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Li C, Zhang Q, Huang W, Huang L, Long Q, Lei Y, Jia D, Yang S, Yang Y, Zhang X, Sun Q. Discovery of a Hidden Pocket beneath the NES Groove by Novel Noncovalent CRM1 Inhibitors. J Med Chem 2023; 66:17044-17058. [PMID: 38105606 DOI: 10.1021/acs.jmedchem.3c01867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Protein localization is frequently manipulated to favor tumor initiation and progression. In cancer cells, the nuclear export factor CRM1 is often overexpressed and aberrantly localizes many tumor suppressors via protein-protein interactions. Although targeting protein-protein interactions is usually challenging, covalent inhibitors, including the FDA-approved drug KPT-330 (selinexor), were successfully developed. The development of noncovalent CRM1 inhibitors remains scarce. Here, by shifting the side chain of two methionine residues and virtually screening against a large compound library, we successfully identified a series of noncovalent CRM1 inhibitors with a stable scaffold. Crystal structures of inhibitor-protein complexes revealed that one of the compounds, B28, utilized a deeply hidden protein interior cavity for binding. SAR analysis guided the development of several B28 derivatives with enhanced inhibition on nuclear export and growth of multiple cancer cell lines. This work may benefit the development of new CRM1-targeted therapies.
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Affiliation(s)
- Cong Li
- Department of Pathology, State Key Laboratory of Biotherapy, and Collaborative Innovation Centre of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
- Department of Pulmonary and Critical Care Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology, Chengdu 610032, China
| | - Qian Zhang
- Department of Pathology, State Key Laboratory of Biotherapy, and Collaborative Innovation Centre of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
- Sichuan Institute of Edible Fungi, Chengdu 610066, China
| | - Wenxin Huang
- Department of Pathology, State Key Laboratory of Biotherapy, and Collaborative Innovation Centre of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
- Department of Pulmonary and Critical Care Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology, Chengdu 610032, China
| | - Luyi Huang
- Department of Pathology, State Key Laboratory of Biotherapy, and Collaborative Innovation Centre of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing 400010, China
| | - Qing Long
- Department of Pathology, State Key Laboratory of Biotherapy, and Collaborative Innovation Centre of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yuqin Lei
- Department of Pathology, State Key Laboratory of Biotherapy, and Collaborative Innovation Centre of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Da Jia
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Pediatrics, Division of Neurology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Shengyong Yang
- Department of Pathology, State Key Laboratory of Biotherapy, and Collaborative Innovation Centre of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yang Yang
- Department of Pulmonary and Critical Care Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology, Chengdu 610032, China
| | - Xia Zhang
- Department of Pathology, State Key Laboratory of Biotherapy, and Collaborative Innovation Centre of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qingxiang Sun
- Department of Pathology, State Key Laboratory of Biotherapy, and Collaborative Innovation Centre of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
- Department of Pulmonary and Critical Care Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology, Chengdu 610032, China
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Jian L, Zscherp R, Beutling U, Shen X, Xu S, Zhang X, Brönstrup M, Klahn P, Sun Q. Discovery of Aminoratjadone Derivatives as Potent Noncovalent CRM1 Inhibitors. J Med Chem 2023; 66:11940-11950. [PMID: 37595020 DOI: 10.1021/acs.jmedchem.3c00549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
Abstract
Cancer cells frequently utilize elevated nuclear export to escape tumor suppression and gain proliferative advantage. Chromosome Region Maintenance 1 (CRM1/XPO1) mediates macromolecule nuclear export and plays an important role in tumorigenesis and progression. The clinical approval of its covalent inhibitor KPT-330 (Selinexor) validates the feasibility of targeting CRM1 to treat cancers. Here, we synthesized four aminoratjadone derivatives and found that two of them, KL1 and KL2, are noncovalent CRM1 inhibitors. The two compounds underwent spontaneous hydrolysis in aqueous buffers, and the resulting products were more active against CRM1. High-resolution crystal structures revealed the CRM1-binding mode of these compounds and explained the observed structure-activity relationships. In cells, KL1 and KL2 localized CRM1 in the nuclear periphery and led to depletion of nuclear CRM1, thereby inhibiting the nuclear export and growth of colorectal cancer cells at submicromolar concentrations. This work lays the foundation for further development of aminoratjadone-based noncovalent CRM1 inhibitors.
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Affiliation(s)
- Lunan Jian
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
- Department of Pulmonary and Critical Care Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610056, China
| | - Robert Zscherp
- NaconLabs─A Technology Transfer Center of iTUBS mbH, Wilhelmsgarten 3, Braunschweig 38100, Germany
| | - Ulrike Beutling
- Department of Chemical Biology, Helmholtz Centre for Infection Research (HZI), Braunschweig 38124, Germany
| | - Xiaofei Shen
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
| | - Shiyang Xu
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
| | - Xia Zhang
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
| | - Mark Brönstrup
- Department of Chemical Biology, Helmholtz Centre for Infection Research (HZI), Braunschweig 38124, Germany
| | - Philipp Klahn
- NaconLabs─A Technology Transfer Center of iTUBS mbH, Wilhelmsgarten 3, Braunschweig 38100, Germany
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemigården 4, Göteborg 412 96, Sweden
| | - Qingxiang Sun
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
- Department of Pulmonary and Critical Care Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610056, China
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Huang L, Tam KS, Xie W. Structural and Biochemical Studies of the Novel Hexameric Endoribonuclease YicC. ACS Chem Biol 2023; 18:1738-1747. [PMID: 37535940 DOI: 10.1021/acschembio.3c00091] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
The decay of mRNA is an essential process to bacteria. The newly identified E. coli protein YicC is a founding member of the UPF0701 family, and biochemical studies indicated that it is an RNase involved in mRNA degradation. However, its biochemical properties and catalytic mechanism are poorly understood. Here, we report the crystal structure of YicC, which shows an extended shape consisting of modular domains. While the backbone trace of the monomer forms a unique, nearly closed loop, the three monomers present in the asymmetric unit make a "shoulder-by-shoulder" trimer. In vitro RNA cleavage assays indicated that this endoribonuclease mainly recognizes the consensus GUG motif, with a preference for an extended CGUG sequence. Additionally, the active enzyme exists as a hexamer in solution and assumes a funnel shape. Structural analysis indicated that the hexamer interface is mainly formed by the hexamerization domain consisting of D71-D124 and that the disruption of the oligomeric form greatly diminished the enzymatic activity. By studying the surface charge potential and the sequence conservation, we identified a series of residues that play critical functional roles, which helps to reveal the catalytic mechanism of this divalent metal-ion-dependent RNase. Last but not least, we discovered that the catalytic domain of YicC did not share similarity with any known nuclease fold, suggesting that the enzyme adopts a novel fold to perform its catalysis and in vivo functions. In summary, our investigations into YicC provide an in-depth understanding of the functions of the UPF0701 protein family and the DUF1732 domain in general.
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Affiliation(s)
- Lin Huang
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory for Biocontrol, School of Life Sciences, The Sun Yat-Sen University, Guangzhou, Guangdong 510006, People's Republic of China
| | - King Sing Tam
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory for Biocontrol, School of Life Sciences, The Sun Yat-Sen University, Guangzhou, Guangdong 510006, People's Republic of China
| | - Wei Xie
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory for Biocontrol, School of Life Sciences, The Sun Yat-Sen University, Guangzhou, Guangdong 510006, People's Republic of China
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Wang C, Liu C, Zhu X, Peng Q, Ma Q. Catalytic site flexibility facilitates the substrate and catalytic promiscuity of Vibrio dual lipase/transferase. Nat Commun 2023; 14:4795. [PMID: 37558668 PMCID: PMC10412561 DOI: 10.1038/s41467-023-40455-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 07/27/2023] [Indexed: 08/11/2023] Open
Abstract
Although enzyme catalysis is typified by high specificity, enzymes can catalyze various substrates (substrate promiscuity) and/or different reaction types (catalytic promiscuity) using a single active site. This interesting phenomenon is widely distributed in enzyme catalysis, with both fundamental and applied importance. To date, the mechanistic understanding of enzyme promiscuity is very limited. Herein, we report the structural mechanism underlying the substrate and catalytic promiscuity of Vibrio dual lipase/transferase (VDLT). Crystal structures of the VDLT from Vibrio alginolyticus (ValDLT) and its fatty acid complexes were solved, revealing prominent structural flexibility. In particular, the "Ser-His-Asp" catalytic triad machinery of ValDLT contains an intrinsically flexible oxyanion hole. Analysis of ligand-bound structures and mutagenesis showed that the flexible oxyanion hole and other binding residues can undergo distinct conformational changes to facilitate substrate and catalytic promiscuity. Our study reveals a previously unknown flexible form of the famous catalytic triad machinery and proposes a "catalytic site tuning" mechanism to expand the mechanistic paradigm of enzyme promiscuity.
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Affiliation(s)
- Chongyang Wang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Changshui Liu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiaochuan Zhu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Quancai Peng
- Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Qingjun Ma
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
- University of Chinese Academy of Sciences, Beijing, China.
- Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.
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5
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Si Z, Cai Y, Zhao L, Han L, Wang F, Yang X, Gao X, Lu M, Liu W. Structure and function characterization of the α-L-arabinofuranosidase from the white-rot fungus Trametes hirsuta. Appl Microbiol Biotechnol 2023:10.1007/s00253-023-12561-w. [PMID: 37178306 DOI: 10.1007/s00253-023-12561-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/17/2023] [Accepted: 04/19/2023] [Indexed: 05/15/2023]
Abstract
α-L-Arabinofuranosidases (Abfs) play a crucial role in the degradation of hemicelluloses, especially arabinoxylans (AX). Most of the available characterized Abfs are from bacteria, while fungi, as natural decomposers, contain Abfs with little attention given. An arabinofuranosidase (ThAbf1), belonging to the glycoside hydrolase 51 (GH51) family, from the genome of the white-rot fungus Trametes hirsuta, was recombinantly expressed, characterized, and functionally determined. The general biochemical properties showed that the optimal conditions for ThAbf1 were pH 6.0 and 50°C. In substrate kinetics assays, ThAbf1 preferred small fragment arabinoxylo-oligosaccharides (AXOS) and could surprisingly hydrolyze di-substituted 23,33-di-L-arabinofuranosyl-xylotriose (A2,3XX). It also synergized with commercial xylanase (XYL) and increased the saccharification efficiency of arabinoxylan. The crystal structure of ThAbf1 indicated the presence of an adjacent cavity next to the catalytic pocket which led to the ability of ThAbf1 to degrade di-substituted AXOS. The narrow binding pocket prevents ThAbf1 from binding larger substrates. These findings have strengthened our understanding of the catalytic mechanism of GH51 family Abfs and provided a theoretical foundation for the development of more efficient and versatile Abfs to accelerate the degradation and biotransformation of hemicellulose in biomass. KEY POINTS: • ThAbf1 from Trametes hirsuta degraded di-substituted arabinoxylo-oligosaccharide. • ThAbf1 performed detailed biochemical characterization and kinetics. • ThAbf1 structure has been obtained to illustrate the substrate specificity.
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Affiliation(s)
- Zhenyuan Si
- Jiangsu Key Laboratory of Druggability of Biopharmaceuticals, State Key Laboratory of Natural Medicines, College of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Yang Cai
- Jiangsu Key Laboratory of Druggability of Biopharmaceuticals, State Key Laboratory of Natural Medicines, College of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Lang Zhao
- Jiangsu Key Laboratory of Druggability of Biopharmaceuticals, State Key Laboratory of Natural Medicines, College of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Lu Han
- Jiangsu Key Laboratory of Druggability of Biopharmaceuticals, State Key Laboratory of Natural Medicines, College of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Feng Wang
- Simcere Pharmaceutical Group Limited, Nanjing, 210042, PR China
| | - Xiaobing Yang
- Biology and Medicine Department, Jiangsu Industrial Technology Research Institute, Nanjing, 210031, PR China
| | - Xiangdong Gao
- Jiangsu Key Laboratory of Druggability of Biopharmaceuticals, State Key Laboratory of Natural Medicines, College of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, PR China.
| | - Meiling Lu
- Jiangsu Key Laboratory of Druggability of Biopharmaceuticals, State Key Laboratory of Natural Medicines, College of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, PR China.
| | - Wei Liu
- Jiangsu Key Laboratory of Druggability of Biopharmaceuticals, State Key Laboratory of Natural Medicines, College of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, PR China.
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6
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Gong X, Wang Y, Tang Y, Wang Y, Zhang M, Li M, Zhang Y, Pan L. ATG16L1 adopts a dual-binding site mode to interact with WIPI2b in autophagy. SCIENCE ADVANCES 2023; 9:eadf0824. [PMID: 36857448 PMCID: PMC9977175 DOI: 10.1126/sciadv.adf0824] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
Macroautophagy plays crucial roles in the regulation of cellular physiology and requires de novo synthesis of double-membrane autophagosomes, which relies on a specific interaction between autophagy-related 16L1 (ATG16L1) and WD repeat domain phosphoinositide-interacting protein 2b (WIPI2b). However, the molecular mechanism governing the interaction of ATG16L1 with WIPI2b remains elusive. Here, we find that ATG16L1 has two distinct binding sites for interacting with WIPI2b, the previously reported WIPI2b-binding site (WBS1) and the previously unidentified site (WBS2). We determine the crystal structures of WIPI2b with ATG16L1 WBS1 and WBS2, respectively, and elucidate the molecular mechanism underpinning the recruitment of ATG16L1 by WIPI2b. Moreover, we uncover that ATG16L1 WBS2 and its binding mode with WIPI2b is well conserved from yeast to mammals, unlike ATG16L1 WBS1. Last, our cell-based functional assays demonstrate that both ATG16L1 WBS1 and WBS2 are required for the effective autophagic flux. In conclusion, our findings provide mechanistic insights into the key ATG16L1/WIPI2b interaction in autophagy.
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Affiliation(s)
- Xinyu Gong
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yingli Wang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yubin Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yaru Wang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Mingfang Zhang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Miao Li
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
| | - Yuchao Zhang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Lifeng Pan
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
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Bai X, Lan J, He S, Bu T, Zhang J, Wang L, Jin X, Mao Y, Guan W, Zhang L, Lu M, Piao H, Jo I, Quan C, Nam KH, Xu Y. Structural and Biochemical Analyses of the Butanol Dehydrogenase from Fusobacterium nucleatum. Int J Mol Sci 2023; 24:ijms24032994. [PMID: 36769315 PMCID: PMC9917632 DOI: 10.3390/ijms24032994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/19/2023] [Accepted: 02/01/2023] [Indexed: 02/05/2023] Open
Abstract
Butanol dehydrogenase (BDH) plays a significant role in the biosynthesis of butanol in bacteria by catalyzing butanal conversion to butanol at the expense of the NAD(P)H cofactor. BDH is an attractive enzyme for industrial application in butanol production; however, its molecular function remains largely uncharacterized. In this study, we found that Fusobacterium nucleatum YqdH (FnYqdH) converts aldehyde into alcohol by utilizing NAD(P)H, with broad substrate specificity toward aldehydes but not alcohols. An in vitro metal ion substitution experiment showed that FnYqdH has higher enzyme activity in the presence of Co2+. Crystal structures of FnYqdH, in its apo and complexed forms (with NAD and Co2+), were determined at 1.98 and 2.72 Å resolution, respectively. The crystal structure of apo- and cofactor-binding states of FnYqdH showed an open conformation between the nucleotide binding and catalytic domain. Key residues involved in the catalytic and cofactor-binding sites of FnYqdH were identified by mutagenesis and microscale thermophoresis assays. The structural conformation and preferred optimal metal ion of FnYqdH differed from that of TmBDH (homolog protein of FnYqdH). Overall, we proposed an alternative model for putative proton relay in FnYqdH, thereby providing better insight into the molecular function of BDH.
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Affiliation(s)
- Xue Bai
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Jing Lan
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Shanru He
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Tingting Bu
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Jie Zhang
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Lulu Wang
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
- School of Life Science and Biotechnology, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China
| | - Xiaoling Jin
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Yuanchao Mao
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Wanting Guan
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Liying Zhang
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Ming Lu
- Shandong Provincial Key Laboratory of Energy Genetics, Key Laboratory of Biofuel, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Hailong Piao
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Inseong Jo
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Chunshan Quan
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Ki Hyun Nam
- Department of Life Science, Pohang University of Science and Technology, Pohang 35398, Republic of Korea
- POSTECH Biotech Center, Pohang University of Science and Technology, Pohang 35398, Republic of Korea
- Correspondence: (K.H.N.); (Y.X.)
| | - Yongbin Xu
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, China
- Correspondence: (K.H.N.); (Y.X.)
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8
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Huang W, Wang JX, Shen X, Lei Y, Chen X, Jia D, Zhang X, Sun Q. Searching for Novel Noncovalent Nuclear Export Inhibitors through a Drug Repurposing Approach. J Med Chem 2023; 66:1574-1582. [PMID: 36622814 DOI: 10.1021/acs.jmedchem.2c01772] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Chromosomal region maintenance protein 1 (CRM1) is a validated anticancer drug target, and its covalent inhibitor KPT-330 has been approved for marketing. However, the development of CRM1 inhibitors, especially the noncovalent ones, is still very limited. Drug repurposing is an effective strategy to develop drug leads for new targets. In this work, we virtually screened a library of marketed drugs and identified zafirlukast as a new CRM1 inhibitor. Biochemical and structural analysis revealed that zafirlukast was a noncovalent CRM1 inhibitor that bound to four subpockets in the nuclear-export-signal (NES) groove. Methylation of the sulfonamide group rendered zafirlukast completely inactive against CRM1. Zafirlukast inhibited the growth of a variety of cancer cells and worked synergistically with the drug doxorubicin. Taken together, these works laid a solid foundation for reshaping zafirlukast as a valuable lead compound for further design of noncovalent, specific, and potent CRM1 inhibitors toward the treatment of various cancers.
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Affiliation(s)
- Wenxin Huang
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Collaborative Innovation Centre of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Jia-Xi Wang
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Collaborative Innovation Centre of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Xiaofei Shen
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
| | - Yuqin Lei
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Collaborative Innovation Centre of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Xueqin Chen
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Collaborative Innovation Centre of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Da Jia
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Pediatrics, Division of Neurology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Xia Zhang
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Collaborative Innovation Centre of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Qingxiang Sun
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Collaborative Innovation Centre of Biotherapy, Sichuan University, Chengdu 610041, China
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9
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Zhang J, Jiang X, Gao H, Zhang F, Zhang X, Zhou A, Xu T, Cai H. Structural Basis of a Novel Agonistic Anti-OX40 Antibody. Biomolecules 2022; 12:biom12091209. [PMID: 36139048 PMCID: PMC9496217 DOI: 10.3390/biom12091209] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/23/2022] [Accepted: 08/26/2022] [Indexed: 11/24/2022] Open
Abstract
Agonistic antibodies targeting co-stimulating receptor OX40 on T cells are considered as important as (or complementary to) the immune checkpoint blockers in cancer treatment. However, none of these agonistic antibodies have reached the late stage of clinical development partially due to the lack of intrinsic potency with the correlation between binding epitope and activity of the antibody not well understood. Here, we identified a novel anti-OX40 agonistic antibody DF004, which stimulated the proliferation of human CD4+ T cells in vitro and inhibited tumor growth in a mouse model. Our crystallography structural studies showed that DF004 binds to the CRD2 region of OX40 while RG7888, an OX40 agonist antibody developed by Roche, binds to CRD3 of OX40 to the diametrically opposite position of DF004. This suggests that the agonistic activities of the antibodies are not necessarily epitope dependent. As their agonistic activities critically depend on clustering or cross-linking, our structural modeling indicates that the agonistic activity requires the optimal positioning of three Fc receptor/antibody/OX40 complexes on the cell membrane to facilitate the formation of one intracellular hexameric TRAF complex for downstream signal transduction, which is relatively inefficient. This may explain the lack of sufficient potency of these OX40 antibodies in a therapeutic setting and sheds light on the development of cross-linking-independent agonistic antibodies.
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Affiliation(s)
- Jing Zhang
- Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Xiaoyong Jiang
- Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Han Gao
- Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Fei Zhang
- Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Xin Zhang
- Dingfu Biotarget Co., Ltd., Suzhou 215126, China
| | - Aiwu Zhou
- Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
- Correspondence: (A.Z.); (T.X.); (H.C.)
| | - Ting Xu
- Dingfu Biotarget Co., Ltd., Suzhou 215126, China
- Correspondence: (A.Z.); (T.X.); (H.C.)
| | - Haiyan Cai
- Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
- Correspondence: (A.Z.); (T.X.); (H.C.)
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10
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Determination of oligosaccharide product distributions of PL7 alginate lyases by their structural elements. Commun Biol 2022; 5:782. [PMID: 35918517 PMCID: PMC9345997 DOI: 10.1038/s42003-022-03721-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 07/14/2022] [Indexed: 11/17/2022] Open
Abstract
Alginate lyases can be used to produce well-defined alginate oligosaccharides (AOSs) because of their specificities for AOS products. A large number of alginate lyases have been recorded in the CAZy database; however, the majority are annotated-only alginate lyases that include little information on their products, thus limiting their applications. Here, we establish a simple and experiment-saving approach to predict product distributions for PL7 alginate lyases through extensive structural biology, bioinformatics and biochemical studies. Structural study on several PL7 alginate lyases reveals that two loops around the substrate binding cleft determine product distribution. Furthermore, a database containing the loop information of all annotated-only single-domain PL7 alginate lyases is constructed, enabling systematic exploration of the association between loop and product distribution. Based on these results, a simplified loop/product distribution relationship is proposed, giving us information on product distribution directly from the amino acid sequence. Characterization of PL7 alginate lyase structure and products enables a bioinformatics approach to predict product distribution from the amino acid sequence.
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11
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Selenourea for Experimental Phasing of Membrane Protein Crystals Grown in Lipid Cubic Phase. CRYSTALS 2022. [DOI: 10.3390/cryst12070976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Heavy-atom soaking has been a major method for experimental phasing, but it has been difficult for membrane proteins, partly owing to the lack of available sites in the scarce soluble domain for non-invasive heavy-metal binding. The lipid cubic phase (LCP) has proven to be a successful method for membrane protein crystallization, but experimental phasing with LCP-grown crystals remains difficult, and so far, only 68 such structures were phased experimentally. Here, the selenourea was tested as a soaking reagent for the single-wavelength anomalous dispersion (SAD) phasing of crystals grown in LCP. Using a single crystal, the structure of the glycerol 3-phosphate acyltransferase (PlsY, ~21 kDa), a very hydrophobic enzyme with 80% membrane-embedded residues, was solved. Remarkably, a total of 15 Se sites were found in the two monomers of PlsY, translating to one selenourea-binding site per every six residues in the accessible extramembrane protein. Structure analysis reveals that surface-exposed selenourea sites are mostly contributed by mainchain amides and carbonyls. This low-specificity binding pattern may explain its high loading ratio. Importantly, both the crystal diffraction quality and the LCP integrity were unaffected by selenourea soaking. Taken together, selenourea presents a promising and generally useful reagent for heavy-atom soaking of membrane protein crystals grown in LCP.
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12
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Zhang N, Wu J, Zhang S, Yuan M, Xu H, Li J, Zhang P, Wang M, Kempher ML, Tao X, Zhang LQ, Ge H, He YX. Molecular basis for coordinating secondary metabolite production by bacterial and plant signaling molecules. J Biol Chem 2022; 298:102027. [PMID: 35568198 PMCID: PMC9163588 DOI: 10.1016/j.jbc.2022.102027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/03/2022] [Accepted: 05/05/2022] [Indexed: 11/28/2022] Open
Abstract
The production of secondary metabolites is a major mechanism used by beneficial rhizobacteria to antagonize plant pathogens. These bacteria have evolved to coordinate the production of different secondary metabolites due to the heavy metabolic burden imposed by secondary metabolism. However, for most secondary metabolites produced by bacteria, it is not known how their biosynthesis is coordinated. Here, we showed that PhlH from the rhizobacterium Pseudomonas fluorescens is a TetR-family regulator coordinating the expression of enzymes related to the biosynthesis of several secondary metabolites, including 2,4-diacetylphloroglucinol (2,4-DAPG), mupirocin, and pyoverdine. We present structures of PhlH in both its apo form and 2,4-DAPG-bound form and elucidate its ligand-recognizing and allosteric switching mechanisms. Moreover, we found that dissociation of 2,4-DAPG from the ligand-binding domain of PhlH was sufficient to allosterically trigger a pendulum-like movement of the DNA-binding domains within the PhlH dimer, leading to a closed-to-open conformational transition. Finally, molecular dynamics simulations confirmed that two distinct conformational states were stabilized by specific hydrogen bonding interactions and that disruption of these hydrogen bonds had profound effects on the conformational transition. Our findings not only reveal a well-conserved route of allosteric signal transduction in TetR-family regulators but also provide novel mechanistic insights into bacterial metabolic coregulation.
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Affiliation(s)
- Nannan Zhang
- School of Life Sciences, Anhui University, Hefei 230601, P.R. China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China.
| | - Jin Wu
- School of Life Sciences, Anhui University, Hefei 230601, P.R. China; Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Material Science and Information Technology, Anhui University, Hefei 230601, P.R. China
| | - Siping Zhang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Maoran Yuan
- School of Life Sciences, Anhui University, Hefei 230601, P.R. China; Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Material Science and Information Technology, Anhui University, Hefei 230601, P.R. China
| | - Hang Xu
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Jie Li
- School of Life Sciences, Anhui University, Hefei 230601, P.R. China; Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Material Science and Information Technology, Anhui University, Hefei 230601, P.R. China
| | - Pingping Zhang
- School of Life Sciences, Anhui University, Hefei 230601, P.R. China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China
| | - Mingzhu Wang
- School of Life Sciences, Anhui University, Hefei 230601, P.R. China; Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Material Science and Information Technology, Anhui University, Hefei 230601, P.R. China
| | - Megan L Kempher
- Institute for Environmental Genomics, Department of Microbiology and Plant Biology, and School of Civil Engineering and Environmental Sciences, University of Oklahoma, Norman, Ok, USA
| | - Xuanyu Tao
- Institute for Environmental Genomics, Department of Microbiology and Plant Biology, and School of Civil Engineering and Environmental Sciences, University of Oklahoma, Norman, Ok, USA
| | - Li-Qun Zhang
- College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Honghua Ge
- School of Life Sciences, Anhui University, Hefei 230601, P.R. China; Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Material Science and Information Technology, Anhui University, Hefei 230601, P.R. China.
| | - Yong-Xing He
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China.
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13
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Sun L, Miao Y, Wang Z, Chen H, Dong P, Zhang H, Wu L, Jiang M, Chen L, Yang W, Lin P, Jing D, Luo Z, Zhang Y, Jung Y, Wu X, Qian Y, Wu Y. Structural insight into African Swine Fever Virus I73R protein reveals it as a Z‐DNA binding protein. Transbound Emerg Dis 2022; 69:e1923-e1935. [DOI: 10.1111/tbed.14527] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 03/04/2022] [Accepted: 03/15/2022] [Indexed: 11/26/2022]
Affiliation(s)
- Lifang Sun
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
| | - Yurun Miao
- MOE Joint International Research Laboratory of Animal Health and Food Safety College of Veterinary Medicine, Nanjing Agricultural University Nanjing Jiangsu China
| | - Zhenzhong Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety College of Veterinary Medicine, Nanjing Agricultural University Nanjing Jiangsu China
- China Animal Health and Epidemiology Center Qingdao China
| | - Huan Chen
- MOE Joint International Research Laboratory of Animal Health and Food Safety College of Veterinary Medicine, Nanjing Agricultural University Nanjing Jiangsu China
| | - Panpan Dong
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
| | - Hong Zhang
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
| | - Linjiao Wu
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
| | - Meiqin Jiang
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
| | - Lifei Chen
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
| | - Wendi Yang
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
| | - Pingdong Lin
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
| | - Dingding Jing
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
| | - Zhipu Luo
- Institute of Molecular Enzymology School of Biology and Basic Medical Sciences Soochow University Suzhou Jiangsu China
| | | | - Yong‐Sam Jung
- MOE Joint International Research Laboratory of Animal Health and Food Safety College of Veterinary Medicine, Nanjing Agricultural University Nanjing Jiangsu China
| | - Xiaodong Wu
- China Animal Health and Epidemiology Center Qingdao China
| | - Yingjuan Qian
- MOE Joint International Research Laboratory of Animal Health and Food Safety College of Veterinary Medicine, Nanjing Agricultural University Nanjing Jiangsu China
- Jiangsu Agri‐animal Husbandry Vocational College Veterinary Bio‐pharmaceutical Jiangsu Key Laboratory for High‐Tech Research and Development of Veterinary Biopharmaceuticals Taizhou Jiangsu China
| | - Yunkun Wu
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation College of Life Science Fujian Normal University Fuzhou 350117 China
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14
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Zhang Z, Guo Z, Xu X, Cao D, Yang H, Li Y, Shi Q, Du Z, Guo X, Wang X, Chen D, Zhang Y, Chen L, Zhou K, Li J, Geng M, Huang X, Xiong B. Structure-Based Discovery of Potent CARM1 Inhibitors for Solid Tumor and Cancer Immunology Therapy. J Med Chem 2021; 64:16650-16674. [PMID: 34781683 DOI: 10.1021/acs.jmedchem.1c01308] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
CARM1 is a protein arginine methyltransferase and acts as a transcriptional coactivator regulating multiple biological processes. Aberrant expression of CARM1 has been related to the progression of multiple types of cancers, and therefore CARM1 was considered as a promising drug target. In the present work, we report the structure-based discovery of a series of N1-(3-(pyrimidin-2-yl)benzyl)ethane-1,2-diamines as potent CARM1 inhibitors, in which compound 43 displays high potency and selectivity. With the advantage of excellent tissue distribution, compound 43 demonstrated good in vivo efficacy for solid tumors. Furthermore, from the detailed immuno-oncology study with MC38 C57BL/6J xenograft model, we confirmed that this chemical probe 43 has profound effects in tumor immunity, which paves the way for future studies on the modulation of arginine post-translational modification that could be utilized in solid tumor treatment and cancer immunotherapy.
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Affiliation(s)
- Zhuqing Zhang
- Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China.,University of Chinese Academy of Sciences, NO.19A Yuquan Road, Beijing 100049, P. R. China
| | - Zuhao Guo
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China.,University of Chinese Academy of Sciences, NO.19A Yuquan Road, Beijing 100049, P. R. China
| | - Xiaowei Xu
- Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China.,University of Chinese Academy of Sciences, NO.19A Yuquan Road, Beijing 100049, P. R. China
| | - Danyan Cao
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Hong Yang
- Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Yanlian Li
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Qiongyu Shi
- Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Zhiyan Du
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Xiaobin Guo
- Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Xin Wang
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Danqi Chen
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Ying Zhang
- Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China.,University of Chinese Academy of Sciences, NO.19A Yuquan Road, Beijing 100049, P. R. China
| | - Lin Chen
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Kaixin Zhou
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Jian Li
- College of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Meiyu Geng
- Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China.,University of Chinese Academy of Sciences, NO.19A Yuquan Road, Beijing 100049, P. R. China.,Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, P. R. China
| | - Xun Huang
- Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China.,University of Chinese Academy of Sciences, NO.19A Yuquan Road, Beijing 100049, P. R. China.,Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, P. R. China
| | - Bing Xiong
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China.,University of Chinese Academy of Sciences, NO.19A Yuquan Road, Beijing 100049, P. R. China
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15
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Fu T, Zhang M, Zhou Z, Wu P, Peng C, Wang Y, Gong X, Li Y, Wang Y, Xu X, Li M, Shen L, Pan L. Structural and biochemical advances on the recruitment of the autophagy-initiating ULK and TBK1 complexes by autophagy receptor NDP52. SCIENCE ADVANCES 2021; 7:7/33/eabi6582. [PMID: 34389544 PMCID: PMC8363153 DOI: 10.1126/sciadv.abi6582] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 06/23/2021] [Indexed: 05/30/2023]
Abstract
The recruitment of Unc-51-like kinase and TANK-binding kinase 1 complexes is essential for Nuclear dot protein 52-mediated selective autophagy and relies on the specific association of NDP52, RB1-inducible coiled-coil protein 1, and Nak-associated protein 1 (5-azacytidine-induced protein 2, AZI2). However, the underlying molecular mechanism remains elusive. Here, we find that except for the NDP52 SKIP carboxyl homology (SKICH)/RB1CC1 coiled-coil interaction, the LC3-interacting region of NDP52 can directly interact with the RB1CC1 Claw domain, as that of NAP1 FIP200-binding region (FIR). The determined crystal structures of NDP52 SKICH/RB1CC1 complex, NAP1 FIR/RB1CC1 complex, and the related NAP1 FIR/Gamma-aminobutyric acid receptor-associated protein complex not only elucidate the molecular bases underpinning the interactions of RB1CC1 with NDP52 and NAP1 but also reveal that RB1CC1 Claw and Autophagy-related protein 8 family proteins are competitive in binding to NAP1 and NDP52. Overall, our findings provide mechanistic insights into the interactions of NDP52, NAP1 with RB1CC1 and ATG8 family proteins.
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Affiliation(s)
- Tao Fu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Mingfang Zhang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Zixuan Zhou
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Ping Wu
- National Facility for Protein Science in Shanghai, Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201210, China
| | - Chao Peng
- National Facility for Protein Science in Shanghai, Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201210, China
| | - Yingli Wang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Xinyu Gong
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Ying Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yaru Wang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Xiaolong Xu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Miao Li
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
| | - Liqiang Shen
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
| | - Lifeng Pan
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China.
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
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16
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Liu F, Su Z, Chen P, Tian X, Wu L, Tang DJ, Li P, Deng H, Ding P, Fu Q, Tang JL, Ming Z. Structural basis for zinc-induced activation of a zinc uptake transcriptional regulator. Nucleic Acids Res 2021; 49:6511-6528. [PMID: 34048589 PMCID: PMC8216289 DOI: 10.1093/nar/gkab432] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 04/29/2021] [Accepted: 05/06/2021] [Indexed: 11/18/2022] Open
Abstract
The zinc uptake regulator (Zur) is a member of the Fur (ferric uptake regulator) family transcriptional regulators that plays important roles in zinc homeostasis and virulence of bacteria. Upon zinc perception, Zur binds to the promoters of zinc responsive genes and controls their transcription. However, the mechanism underlying zinc-mediated Zur activation remains unclear. Here we report a 2.2-Å crystal structure of apo Zur from the phytopathogen Xanthomonas campestris pv. campestris (XcZur), which reveals the molecular mechanism that XcZur exists in a closed inactive state before regulatory zinc binding. Subsequently, we present a 1.9-Å crystal structure of holo XcZur, which, by contrast, adopts an open state that has enough capacity to bind DNA. Structural comparison and hydrogen deuterium exchange mass spectrometry (HDX-MS) analyses uncover that binding of a zinc atom in the regulatory site, formed by the hinge region, the dimerization domain and the DNA binding domain, drives a closed-to-open conformational change that is essential for XcZur activation. Moreover, key residues responsible for DNA recognition are identified by site-directed mutagenesis. This work provides important insights into zinc-induced XcZur activation and valuable discussions on the mechanism of DNA recognition.
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Affiliation(s)
- Fenmei Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi Key Laboratory for Sugarcane Biology, Guangxi University, Nanning 530004, China
| | - Zihui Su
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi Key Laboratory for Sugarcane Biology, Guangxi University, Nanning 530004, China
| | - Peng Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi Key Laboratory for Sugarcane Biology, Guangxi University, Nanning 530004, China
| | - Xiaolin Tian
- Protein Chemistry and Proteomics Facility, Protein Research Technology Center, Tsinghua University, Beijing 100084, China
| | - Lijie Wu
- iHuman Institute, ShanghaiTech University, Shanghai 201210, China
| | - Dong-Jie Tang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi Key Laboratory for Sugarcane Biology, Guangxi University, Nanning 530004, China
| | - Peifang Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi Key Laboratory for Sugarcane Biology, Guangxi University, Nanning 530004, China
| | - Haiteng Deng
- Protein Chemistry and Proteomics Facility, Protein Research Technology Center, Tsinghua University, Beijing 100084, China
| | - Pengfei Ding
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, MD 21250, USA
| | - Qiang Fu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi Key Laboratory for Sugarcane Biology, Guangxi University, Nanning 530004, China
| | - Ji-Liang Tang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi Key Laboratory for Sugarcane Biology, Guangxi University, Nanning 530004, China
| | - Zhenhua Ming
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi Key Laboratory for Sugarcane Biology, Guangxi University, Nanning 530004, China
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17
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Lei Y, Li Y, Tan Y, Qian Z, Zhou Q, Jia D, Sun Q. Novel Mechanistic Observations and NES-Binding Groove Features Revealed by the CRM1 Inhibitors Plumbagin and Oridonin. JOURNAL OF NATURAL PRODUCTS 2021; 84:1478-1488. [PMID: 33890470 DOI: 10.1021/acs.jnatprod.0c01231] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The protein chromosome region maintenance 1 (CRM1) is an important nuclear export factor and drug target in diseases such as cancer and viral infections. Several plant-derived CRM1 inhibitors including plumbagin and oridonin possess potent antitumor activities. However, their modes of CRM1 inhibition remain unclear. Here, a multimutant CRM1 was engineered to enable crystallization of these two small molecules in its NES groove. Plumbagin and oridonin share the same three conjugation sites in CRM1. In solution, these two inhibitors targeted more CRM1 sites and inhibited its activity through promoting its aggregation, in addition to directly targeting the NES groove. While the plumbagin-bound NES groove resembles the NES-bound groove state, the oridonin complex reveals for the first time a more open NES groove. The observed greater NES groove dynamics may improve cargo loading through a "capture-and-tighten" mechanism. This work thus provides new insights on the mechanism of CRM1 inhibition by two natural products and a structural basis for further development of these or other CRM1 inhibitors.
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Affiliation(s)
- Yuqin Lei
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, People's Republic of China
| | - Yuling Li
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, People's Republic of China
| | - Yuping Tan
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, People's Republic of China
| | - Zhiyong Qian
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, People's Republic of China
| | - Qiao Zhou
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, People's Republic of China
| | - Da Jia
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Pediatrics, Division of Neurology, West China Second University Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Qingxiang Sun
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, People's Republic of China
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18
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Lei Y, An Q, Shen XF, Sui M, Li C, Jia D, Luo Y, Sun Q. Structure-Guided Design of the First Noncovalent Small-Molecule Inhibitor of CRM1. J Med Chem 2021; 64:6596-6607. [PMID: 33974430 DOI: 10.1021/acs.jmedchem.0c01675] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nuclear export factor chromosome region maintenance 1 (CRM1) is an attractive anticancer and antiviral drug target that spurred several research efforts to develop its inhibitor. Noncovalent CRM1 inhibitors are desirable, but none is reported to date. Here, we present the crystal structure of yeast CRM1 in complex with S109, a substructure of CBS9106 (under clinical test). Superimposition with the LFS-829 (another covalent CRM1 inhibitor) complex inspired the design of a noncovalent CRM1 inhibitor. Among nine synthesized compounds, noncovalent CRM1 inhibitor 1 (NCI-1) showed a high affinity to human and yeast CRM1 in the absence or presence of GST-bound Ras-related nuclear protein (RanGTP). Unlike covalent inhibitors, the crystal structure showed that NCI-1 is bound in the "open" nuclear export signal (NES) groove of CRM1, simultaneously occupying two hydrophobic pockets. NCI-1 additionally inhibited the nuclear export and proliferation of cells harboring the human CRM1-C528S mutant. Our work opens up the avenue of noncovalent CRM1 inhibitor development toward a more potent, less toxic, and broad-spectrum anticancer/antiviral therapy.
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Affiliation(s)
- Yuqin Lei
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
| | - Qi An
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
| | - Xiao-Fei Shen
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Paediatrics, Division of Neurology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Min Sui
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
| | - Chungen Li
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
| | - Da Jia
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Paediatrics, Division of Neurology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Youfu Luo
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
| | - Qingxiang Sun
- Department of Pathology, State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University and Collaborative Innovation Centre of Biotherapy, Chengdu 610041, China
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19
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Kazantsev D, Duman R, Wagner A, Mykhaylyk V, Wanelik K, Basham M, Wadeson N. X-ray tomographic reconstruction and segmentation pipeline for the long-wavelength macromolecular crystallography beamline at Diamond Light Source. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:889-901. [PMID: 33949996 PMCID: PMC8127374 DOI: 10.1107/s1600577521003453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 03/31/2021] [Indexed: 06/12/2023]
Abstract
In this paper a practical solution for the reconstruction and segmentation of low-contrast X-ray tomographic data of protein crystals from the long-wavelength macromolecular crystallography beamline I23 at Diamond Light Source is provided. The resulting segmented data will provide the path lengths through both diffracting and non-diffracting materials as basis for analytical absorption corrections for X-ray diffraction data taken in the same sample environment ahead of the tomography experiment. X-ray tomography data from protein crystals can be difficult to analyse due to very low or absent contrast between the different materials: the crystal, the sample holder and the surrounding mother liquor. The proposed data processing pipeline consists of two major sequential operations: model-based iterative reconstruction to improve contrast and minimize the influence of noise and artefacts, followed by segmentation. The segmentation aims to partition the reconstructed data into four phases: the crystal, mother liquor, loop and vacuum. In this study three different semi-automated segmentation methods are experimented with by using Gaussian mixture models, geodesic distance thresholding and a novel morphological method, RegionGrow, implemented specifically for the task. The complete reconstruction-segmentation pipeline is integrated into the MPI-based data analysis and reconstruction framework Savu, which is used to reduce computation time through parallelization across a computing cluster and makes the developed methods easily accessible.
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Affiliation(s)
- Daniil Kazantsev
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Fermi Avenue, Didcot OX11 0DE United Kingdom
| | - Ramona Duman
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Fermi Avenue, Didcot OX11 0DE United Kingdom
| | - Armin Wagner
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Fermi Avenue, Didcot OX11 0DE United Kingdom
| | - Vitaliy Mykhaylyk
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Fermi Avenue, Didcot OX11 0DE United Kingdom
| | - Kazimir Wanelik
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Fermi Avenue, Didcot OX11 0DE United Kingdom
| | - Mark Basham
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Fermi Avenue, Didcot OX11 0DE United Kingdom
- Rosalind Franklin Institute, Rosalind Franklin Institute Hub, Harwell Campus, Didcot OX11 0FA, United Kingdom
| | - Nicola Wadeson
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Fermi Avenue, Didcot OX11 0DE United Kingdom
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20
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Sui M, Xiong M, Li Y, Zhou Q, Shen X, Jia D, Gou M, Sun Q. Cancer Therapy with Nanoparticle-Medicated Intracellular Expression of Peptide CRM1-Inhibitor. Int J Nanomedicine 2021; 16:2833-2847. [PMID: 33883894 PMCID: PMC8054660 DOI: 10.2147/ijn.s266398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 09/29/2020] [Indexed: 02/05/2023] Open
Abstract
INTRODUCTION Peptides can be rationally designed as non-covalent inhibitors for molecularly targeted therapy. However, it remains challenging to efficiently deliver the peptides into the targeted cells, which often severely affects their therapeutic efficiency. METHODS Herein, we created a novel non-covalent peptide inhibitor against nuclear export factor CRM1 by a structure-guided drug design method and targetedly delivered the peptide into cancer cells by a nanoparticle-mediated gene expression system for use as a cancer therapy. RESULTS The nuclear export signal (NES)-optimized CRM1 peptide inhibitor colocalized with CRM1 to the nuclear envelope and inhibited nuclear export in cancer cell lines in vitro. The crystal structures of the inhibitors complexed with CRM1 were solved. In contrast to the covalent inhibitors, the peptides were similarly effective against cells harboring the CRM1 C528S mutation. Moreover, a plasmid encoding the peptides was delivered by a iRGD-modified nanoparticle to efficiently target and transfect the cancer cells in vivo after intravenous administration. The peptides could be selectively expressed in the tumor, resulting in the efficient inhibition of subcutaneous melanoma xenografts without obvious systemic toxicity. DISCUSSION This work provides an effective strategy to design peptide-based molecularly targeted therapeutics, which could lead to the development of future targeted therapy.
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Affiliation(s)
- Min Sui
- Department of Pathology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, and Collaborative Innovation Centre for Biotherapy, Chengdu, 610041, People’s Republic of China
| | - Meimei Xiong
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, People’s Republic of China
| | - Yuling Li
- Department of Pathology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, and Collaborative Innovation Centre for Biotherapy, Chengdu, 610041, People’s Republic of China
| | - Qiao Zhou
- Department of Pathology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, and Collaborative Innovation Centre for Biotherapy, Chengdu, 610041, People’s Republic of China
| | - Xiaofei Shen
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Pediatrics, Division of Neurology, West China Second University Hospital, Sichuan University, Chengdu, 610041, People’s Republic of China
| | - Da Jia
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Pediatrics, Division of Neurology, West China Second University Hospital, Sichuan University, Chengdu, 610041, People’s Republic of China
| | - Maling Gou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, People’s Republic of China
| | - Qingxiang Sun
- Department of Pathology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, and Collaborative Innovation Centre for Biotherapy, Chengdu, 610041, People’s Republic of China
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21
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Phosphorylation regulates the binding of autophagy receptors to FIP200 Claw domain for selective autophagy initiation. Nat Commun 2021; 12:1570. [PMID: 33692357 PMCID: PMC7946963 DOI: 10.1038/s41467-021-21874-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 02/17/2021] [Indexed: 12/20/2022] Open
Abstract
The ULK complex initiates the autophagosome formation, and has recently been implicated in selective autophagy by interacting with autophagy receptors through its FIP200 subunit. However, the structural mechanism underlying the interactions of autophagy receptors with FIP200 and the relevant regulatory mechanism remain elusive. Here, we discover that the interactions of FIP200 Claw domain with autophagy receptors CCPG1 and Optineurin can be regulated by the phosphorylation in their respective FIP200-binding regions. We determine the crystal structures of FIP200 Claw in complex with the phosphorylated CCPG1 and Optineurin, and elucidate the detailed molecular mechanism governing the interactions of FIP200 Claw with CCPG1 and Optineurin as well as their potential regulations by kinase-mediated phosphorylation. In addition, we define the consensus FIP200 Claw-binding motif, and find other autophagy receptors that contain this motif within their conventional LC3-interacting regions. In all, our findings uncover a general and phosphoregulatable binding mode shared by many autophagy receptors to interact with FIP200 Claw for autophagosome biogenesis, and are valuable for further understanding the molecular mechanism of selective autophagy.
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22
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Zhang Q, Cao HY, Wei L, Lu D, Du M, Yuan M, Shi D, Chen X, Wang P, Chen XL, Chi L, Zhang YZ, Li F. Discovery of exolytic heparinases and their catalytic mechanism and potential application. Nat Commun 2021; 12:1263. [PMID: 33627653 PMCID: PMC7904915 DOI: 10.1038/s41467-021-21441-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 01/25/2021] [Indexed: 01/31/2023] Open
Abstract
Heparinases (Hepases) are critical tools for the studies of highly heterogeneous heparin (HP)/heparan sulfate (HS). However, exolytic heparinases urgently needed for the sequencing of HP/HS chains remain undiscovered. Herein, a type of exolytic heparinases (exoHepases) is identified from the genomes of different bacteria. These exoHepases share almost no homology with known Hepases and prefer to digest HP rather than HS chains by sequentially releasing unsaturated disaccharides from their reducing ends. The structural study of an exoHepase (BIexoHep) shows that an N-terminal conserved DUF4962 superfamily domain is essential to the enzyme activities of these exoHepases, which is involved in the formation of a unique L-shaped catalytic cavity controlling the sequential digestion of substrates through electrostatic interactions. Further, several HP octasaccharides have been preliminarily sequenced by using BIexoHep. Overall, this study fills the research gap of exoHepases and provides urgently needed tools for the structural and functional studies of HP/HS chains.
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Affiliation(s)
- Qingdong Zhang
- grid.27255.370000 0004 1761 1174National Glycoengineering Research Center and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
| | - Hai-Yan Cao
- grid.27255.370000 0004 1761 1174State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China ,grid.4422.00000 0001 2152 3263College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China ,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Lin Wei
- grid.27255.370000 0004 1761 1174National Glycoengineering Research Center and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
| | - Danrong Lu
- grid.27255.370000 0004 1761 1174National Glycoengineering Research Center and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
| | - Min Du
- grid.27255.370000 0004 1761 1174National Glycoengineering Research Center and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
| | - Min Yuan
- grid.27255.370000 0004 1761 1174National Glycoengineering Research Center and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
| | - Deling Shi
- grid.27255.370000 0004 1761 1174National Glycoengineering Research Center and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
| | | | - Peng Wang
- grid.4422.00000 0001 2152 3263College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China ,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Xiu-Lan Chen
- grid.27255.370000 0004 1761 1174State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China ,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Lianli Chi
- grid.27255.370000 0004 1761 1174National Glycoengineering Research Center and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
| | - Yu-Zhong Zhang
- grid.4422.00000 0001 2152 3263College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China ,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Fuchuan Li
- grid.27255.370000 0004 1761 1174National Glycoengineering Research Center and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao, China
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23
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Zhang K, Liu T, Liu W, Lyu Q. Structural insights into the substrate-binding cleft of AlyF reveal the first long-chain alginate-binding mode. ACTA CRYSTALLOGRAPHICA SECTION D-STRUCTURAL BIOLOGY 2021; 77:336-346. [PMID: 33645537 DOI: 10.1107/s205979832100005x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 01/03/2021] [Indexed: 11/10/2022]
Abstract
The products of alginate degradation, alginate oligosaccharides (AOS), have potential applications in many areas, including functional foods and marine drugs. Enzyme-based approaches using alginate lyases have advantages in the preparation of well defined AOS and have attracted much attention in recent years. However, a lack of structural insight into the whole substrate-binding cleft for most known alginate lyases severely hampers their application in the industrial generation of well defined AOS. To solve this issue, AlyF was co-crystallized with the long alginate oligosaccharide G6 (L-hexaguluronic acid hexasodium salt), which is the longest bound substrate in all solved alginate lyase complex structures. AlyF formed interactions with G6 from subsites -3 to +3 without additional substrate-binding site interactions, suggesting that the substrate-binding cleft of AlyF was fully occupied by six sugars, which was further confirmed by isothermal titration calorimetry and differential scanning calorimetry analyses. More importantly, a combination of structural comparisons and mutagenetic analyses determined that three key loops (loop 1, Lys215-Glu236; loop 2, Gln402-Ile416; loop 3, Arg334-Gly348) mainly function in binding long substrates (degree of polymerization of >4). The potential flexibility of loop 1 and loop 2 might enable the substrate to continue to enter the cleft after binding to subsites +1 to +3; loop 3 stabilizes and orients the substrate at subsites -2 and -3. Taken together, these results provide the first possible alginate lyase-substrate binding profile for long-chain alginates, facilitating the rational design of new enzymes for industrial purposes.
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Affiliation(s)
- Keke Zhang
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Tao Liu
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Weizhi Liu
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Qianqian Lyu
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, People's Republic of China
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24
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Wang X, Ma Q. Wzb of Vibrio vulnificus represents a new group of low-molecular-weight protein tyrosine phosphatases with a unique insertion in the W-loop. J Biol Chem 2021; 296:100280. [PMID: 33450227 PMCID: PMC7948962 DOI: 10.1016/j.jbc.2021.100280] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/28/2020] [Accepted: 01/08/2021] [Indexed: 12/23/2022] Open
Abstract
Protein tyrosine phosphorylation regulates the production of capsular polysaccharide, an essential virulence factor of the deadly pathogen Vibrio vulnificus. The process requires the protein tyrosine kinase Wzc and its cognate phosphatase Wzb, both of which are largely uncharacterized. Herein, we report the structures of Wzb of V. vulnificus (VvWzb) in free and ligand-bound forms. VvWzb belongs to the low-molecular-weight protein tyrosine phosphatase (LMWPTP) family. Interestingly, it contains an extra four-residue insertion in the W-loop, distinct from all known LMWPTPs. The W-loop of VvWzb protrudes from the protein body in the free structure, but undergoes significant conformational changes to fold toward the active site upon ligand binding. Deleting the four-residue insertion from the W-loop severely impaired the enzymatic activity of VvWzb, indicating its importance for optimal catalysis. However, mutating individual residues or even substituting the whole insertion with four alanine residues only modestly decreased the enzymatic activity, suggesting that the contribution of the insertion to catalysis is not determined by the sequence specificity. Furthermore, inserting the four residues into Escherichia coli Wzb at the corresponding position enhanced its activity as well, indicating that the four-residue insertion in the W-loop can act as a general activity enhancing element for other LMWPTPs. The novel W-loop type and phylogenetic analysis suggested that VvWzb and its homologs should be classified into a new group of LMWPTPs. Our study sheds new insight into the catalytic mechanism and structural diversity of the LMWPTP family and promotes the understanding of the protein tyrosine phosphorylation system in prokaryotes.
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Affiliation(s)
- Xin Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China
| | - Qingjun Ma
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China.
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25
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Xu X, Liu J, Wang Y, Wang Y, Gong X, Pan L. Mechanistic Insights into the Interactions of Ras Subfamily
GTPases
with the
SPN
Domain of Autism‐associated
SHANK3
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaolong Xu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Jianping Liu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yingli Wang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yaru Wang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Xinyu Gong
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Lifeng Pan
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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26
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Xu F, Chen XL, Sun XH, Dong F, Li CY, Li PY, Ding H, Chen Y, Zhang YZ, Wang P. Structural and molecular basis for the substrate positioning mechanism of a new PL7 subfamily alginate lyase from the arctic. J Biol Chem 2020; 295:16380-16392. [PMID: 32967968 PMCID: PMC7705320 DOI: 10.1074/jbc.ra120.015106] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 09/13/2020] [Indexed: 11/06/2022] Open
Abstract
Alginate lyases play important roles in alginate degradation in the ocean. Although a large number of alginate lyases have been characterized, little is yet known about those in extremely cold polar environments, which may have unique mechanisms for environmental adaptation and for alginate degradation. Here, we report the characterization of a novel PL7 alginate lyase AlyC3 from Psychromonas sp. C-3 isolated from the Arctic brown alga Laminaria, including its phylogenetic classification, catalytic properties, and structure. We propose the establishment of a new PM-specific subfamily of PL7 (subfamily 6) represented by AlyC3 based on phylogenetic analysis and enzymatic properties. Structural and biochemical analyses showed that AlyC3 is a dimer, representing the first dimeric endo-alginate lyase structure. AlyC3 is activated by NaCl and adopts a novel salt-activated mechanism; that is, salinity adjusts the enzymatic activity by affecting its aggregation states. We further solved the structure of an inactive mutant H127A/Y244A in complex with a dimannuronate molecule and proposed the catalytic process of AlyC3 based on structural and biochemical analyses. We show that Arg82 and Tyr190 at the two ends of the catalytic canyon help the positioning of the repeated units of the substrate and that His127, Tyr244, Arg78, and Gln125 mediate the catalytic reaction. Our study uncovers, for the first time, the amino acid residues for alginate positioning in an alginate lyase and demonstrates that such residues involved in alginate positioning are conserved in other alginate lyases. This study provides a better understanding of the mechanisms of alginate degradation by alginate lyases.
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Affiliation(s)
- Fei Xu
- State Key Laboratory of Microbial Technology, and Marine Biotechnology Research Center, Shandong University, Qingdao, China
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, and Marine Biotechnology Research Center, Shandong University, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiao-Hui Sun
- State Key Laboratory of Microbial Technology, and Marine Biotechnology Research Center, Shandong University, Qingdao, China
| | - Fang Dong
- State Key Laboratory of Microbial Technology, and Marine Biotechnology Research Center, Shandong University, Qingdao, China
| | - Chun-Yang Li
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China; College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China
| | - Ping-Yi Li
- State Key Laboratory of Microbial Technology, and Marine Biotechnology Research Center, Shandong University, Qingdao, China
| | - Haitao Ding
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai, China
| | - Yin Chen
- College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China; School of Life Sciences, University of Warwick, Warwick, Coventry, United Kingdom
| | - Yu-Zhong Zhang
- State Key Laboratory of Microbial Technology, and Marine Biotechnology Research Center, Shandong University, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China; College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China
| | - Peng Wang
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China; College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China.
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27
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Zhou Y, Wang W, Salauddin NM, Lin L, You M, You S, Yuchi Z. Crystal structure of the N-terminal domain of ryanodine receptor from the honeybee, Apis mellifera. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2020; 125:103454. [PMID: 32781205 DOI: 10.1016/j.ibmb.2020.103454] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/24/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Ryanodine receptors (RyRs) are the molecular target of diamides, a new chemical class of insecticides. Diamide insecticides are used to control lepidopteran pests and were considered relatively safe for mammals and non-targeted beneficial insects, including honey bees. However, recent studies showed that exposure to diamides could cause long-lasting locomotor deficits of bees. Here we report the crystal structure of RyR N-terminal domain A (NTD-A) from the honeybee, Apis mellifera, at 2.5 Å resolution. It shows a similar overall fold as the RyR NTD-A from mammals and the diamondback moth (DBM), Plutella xylostella, and still several loops located at the inter-domain interfaces show insect-specific or bee-specific structural features. A potential insecticide-binding pocket formed by loop9 and loop13 is conserved in lepidopteran but different in both mammals and bees, making it a good candidate targeting site for the development of pest-selective insecticides. Furthermore, a conserved intra-domain disulfide bond was observed in both DBM and bee RyR NTD-A crystal structures, which explains their higher thermal stability compared to mammalian RyR NTD-A. This work provides a basis for the development of novel insecticides with better selectivity between pests and bees by targeting a distinct site on pest RyRs, which would be a promising strategy to overcome the current toxicity problem.
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Affiliation(s)
- Yuanyuan Zhou
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, China; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, 350002, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, 350002, China
| | - Wenlan Wang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, China
| | - Nahiyan Mohammad Salauddin
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, China
| | - Lianyun Lin
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, China
| | - Minsheng You
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, 350002, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, 350002, China
| | - Shijun You
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, 350002, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, 350002, China.
| | - Zhiguang Yuchi
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, China; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
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Decoding three distinct states of the Syntaxin17 SNARE motif in mediating autophagosome-lysosome fusion. Proc Natl Acad Sci U S A 2020; 117:21391-21402. [PMID: 32817423 DOI: 10.1073/pnas.2006997117] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Syntaxin17, a key autophagosomal N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) protein, can associate with ATG8 family proteins SNAP29 and VAMP8 to facilitate the membrane fusion process between the double-membraned autophagosome and single-membraned lysosome in mammalian macroautophagy. However, the inherent properties of Syntaxin17 and the mechanistic basis underlying the interactions of Syntaxin17 with its binding proteins remain largely unknown. Here, using biochemical, NMR, and structural approaches, we systemically characterized Syntaxin17 as well as its interactions with ATG8 family proteins, SNAP29 and VAMP8. We discovered that Syntaxin17 alone adopts an autoinhibited conformation mediated by a direct interaction between its Habc domain and the Qa-SNARE motif. In addition, we revealed that the Qa-SNARE region of Syntaxin17 contains one LC3-interacting region (LIR) motif, which preferentially binds to GABARAP subfamily members. Importantly, the GABARAP binding of Syntaxin17 can release its autoinhibited state. The determined crystal structure of the Syntaxin17 LIR-GABARAP complex not only provides mechanistic insights into the interaction between Syntaxin17 and GABARAP but also reveals an unconventional LIR motif with a C-terminally extended 310 helix for selectively binding to ATG8 family proteins. Finally, we also elucidated structural arrangements of the autophagic Syntaxin17-SNAP29-VAMP8 SNARE core complex, and uncovered its conserved biochemical and structural characteristics common to all other SNAREs. In all, our findings reveal three distinct states of Syntaxin17, and provide mechanistic insights into the Syntaxin17-mediated autophagosome-lysosome fusion process.
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Yan F, Huang C, Wang X, Tan J, Cheng S, Wan M, Wang Z, Wang S, Luo S, Li A, Guo X, Feng M, Liu X, Zhu Y, Zhou Y. Threonine ADP-Ribosylation of Ubiquitin by a Bacterial Effector Family Blocks Host Ubiquitination. Mol Cell 2020; 78:641-652.e9. [PMID: 32330457 DOI: 10.1016/j.molcel.2020.03.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 01/10/2020] [Accepted: 03/10/2020] [Indexed: 12/16/2022]
Abstract
Ubiquitination is essential for numerous eukaryotic cellular processes. Here, we show that the type III effector CteC from Chromobacterium violaceum functions as an adenosine diphosphate (ADP)-ribosyltransferase that specifically modifies ubiquitin via threonine ADP-ribosylation on residue T66. The covalent modification prevents the transfer of ubiquitin from ubiquitin-activating enzyme E1 to ubiquitin-conjugating enzyme E2, which inhibits subsequent ubiquitin activation by E2 and E3 enzymes in the ubiquitination cascade and leads to the shutdown of polyubiquitin synthesis in host cells. This unique modification also causes dysfunction of polyubiquitin chains in cells, thereby blocking host ubiquitin signaling. The disruption of host ubiquitination by CteC plays a crucial role in C. violaceum colonization in mice during infection. CteC represents a family of effector proteins in pathogens of hosts from different kingdoms. All the members of this family specifically ADP-ribosylate ubiquitin. The action of CteC reveals a new mechanism for interfering with host ubiquitination by pathogens.
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Affiliation(s)
- Fujie Yan
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Chunfeng Huang
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xiaofei Wang
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Jiaxing Tan
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Sen Cheng
- Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Muyang Wan
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Zhao Wang
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Shuangyu Wang
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Shuhui Luo
- Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Arong Li
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xing Guo
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Mingguang Feng
- Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xiaoyun Liu
- Department of Microbiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Yongqun Zhu
- MOE Key Laboratory for Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, China.
| | - Yan Zhou
- Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China.
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30
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Qu X, Song X, Zhang N, Ma J, Ge H. The phospholipase A effector PlaA from Legionella pneumophila: expression, purification and crystallization. Acta Crystallogr F Struct Biol Commun 2020; 76:138-144. [DOI: 10.1107/s2053230x20002149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 02/14/2020] [Indexed: 11/10/2022] Open
Abstract
Legionella pneumophila encodes an extracellular secreted phospholipase A named PlaA that is translocated by the type II secretion system. It plays an essential role in maintaining the integrity of Legionella-containing vacuoles in L. pneumophila pathogenesis. Here, it is shown that PlaA has a main lysophospholipase activity to hydrolyze fatty-acyl groups in lysophospholipids. Although it has a very low phospholipase A activity to catalyze the hydrolysis of fatty-acyl groups in phospholipids, PlaA can bind phospholipids such as 1,2-dipalmitoylphosphatidylcholine with a dissociation constant of 11.1 µM. Sequence-alignment analysis combined with activity assays revealed that PlaA contains a distinct substrate-binding site among the known structures of the phospholipase A family, implying that PlaA may present a novel mechanism for substrate recognition. Native PlaA and its selenomethionine (SeMet)-substituted form were purified and crystallized by vapour diffusion in hanging drops at 296 K. Diffraction data were collected to a resolution of 2.0 Å for native PlaA protein and to a resolution of 2.7 Å for SeMet-substituted PlaA protein. The crystals of native PlaA belonged to the monoclinic space group P21, while the crystals of SeMet-substituted PlaA belonged to the primitive orthorhombic space group P212121. Initial phases for PlaA were obtained from SeMet SAD data sets.
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31
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Hu S, Guo Y, Wang Y, Li Y, Fu T, Zhou Z, Wang Y, Liu J, Pan L. Structure of Myosin VI/Tom1 complex reveals a cargo recognition mode of Myosin VI for tethering. Nat Commun 2019; 10:3459. [PMID: 31371777 PMCID: PMC6673701 DOI: 10.1038/s41467-019-11481-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 07/16/2019] [Indexed: 12/31/2022] Open
Abstract
Myosin VI plays crucial roles in diverse cellular processes. In autophagy, Myosin VI can facilitate the maturation of autophagosomes through interactions with Tom1 and the autophagy receptors, Optineurin, NDP52 and TAX1BP1. Here, we report the high-resolution crystal structure of the C-terminal cargo-binding domain (CBD) of Myosin VI in complex with Tom1, which elucidates the mechanistic basis underpinning the specific interaction between Myosin VI and Tom1, and uncovers that the C-terminal CBD of Myosin VI adopts a unique cargo recognition mode to interact with Tom1 for tethering. Furthermore, we show that Myosin VI can serve as a bridging adaptor to simultaneously interact with Tom1 and autophagy receptors through two distinct interfaces. In all, our findings provide mechanistic insights into the interactions of Myosin VI with Tom1 and relevant autophagy receptors, and are valuable for further understanding the functions of these proteins in autophagy and the cargo recognition modes of Myosin VI. Myosin VI can facilitate the maturation of autophagosomes in autophagy through interactions with Tom1 and autophagy receptors. Here authors report the structure of the cargobinding domain of Myosin VI in complex with Tom1, which provides insights into Myosin IV’s cargo recognition modes.
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Affiliation(s)
- Shichen Hu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Yujiao Guo
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Yingli Wang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Ying Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Tao Fu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Zixuan Zhou
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Yaru Wang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Jianping Liu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Lifeng Pan
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200032, Shanghai, China.
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32
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Zhou H, Chen Y, Zhang S, Niu P, Qin K, Jia W, Huang B, Zhang S, Lan J, Zhang L, Tan W, Wang X. Structural definition of a neutralization epitope on the N-terminal domain of MERS-CoV spike glycoprotein. Nat Commun 2019; 10:3068. [PMID: 31296843 PMCID: PMC6624210 DOI: 10.1038/s41467-019-10897-4] [Citation(s) in RCA: 103] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 06/05/2019] [Indexed: 02/05/2023] Open
Abstract
Most neutralizing antibodies against Middle East respiratory syndrome coronavirus (MERS-CoV) target the receptor-binding domain (RBD) of the spike glycoprotein and block its binding to the cellular receptor dipeptidyl peptidase 4 (DPP4). The epitopes and mechanisms of mAbs targeting non-RBD regions have not been well characterized yet. Here we report the monoclonal antibody 7D10 that binds to the N-terminal domain (NTD) of the spike glycoprotein and inhibits the cell entry of MERS-CoV with high potency. Structure determination and mutagenesis experiments reveal the epitope and critical residues on the NTD for 7D10 binding and neutralization. Further experiments indicate that the neutralization by 7D10 is not solely dependent on the inhibition of DPP4 binding, but also acts after viral cell attachment, inhibiting the pre-fusion to post-fusion conformational change of the spike. These properties give 7D10 a wide neutralization breadth and help explain its synergistic effects with several RBD-targeting antibodies. Antibodies that target the N-terminal domain (NTD) of the MERS-CoV spike remain poorly characterized. Here, Zhou et al. report the structural and functional analysis of the NTD-targeting mAb 7D10 and show that it synergizes with antibodies targeting the receptor-binding domain against different MERS-CoV strains.
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Affiliation(s)
- Haixia Zhou
- The Ministry of Education Key Laboratory of Protein Science, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, Collaborative Innovation Center for Biotherapy, School of Life Sciences, Tsinghua University, 100084, Beijing, China
| | - Yingzhu Chen
- Key Laboratory of Medical Virology, National Health and Family Planning Commission, National Institute for Viral Disease Control and Prevention, China CDC, 102206, Beijing, China.,Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Clinical Laboratory, Peking University Cancer Hospital & Institute, 100142, Beijing, China
| | - Shuyuan Zhang
- The Ministry of Education Key Laboratory of Protein Science, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, Collaborative Innovation Center for Biotherapy, School of Life Sciences, Tsinghua University, 100084, Beijing, China
| | - Peihua Niu
- Key Laboratory of Medical Virology, National Health and Family Planning Commission, National Institute for Viral Disease Control and Prevention, China CDC, 102206, Beijing, China
| | - Kun Qin
- Key Laboratory of Medical Virology, National Health and Family Planning Commission, National Institute for Viral Disease Control and Prevention, China CDC, 102206, Beijing, China
| | - Wenxu Jia
- Comprehensive AIDS Research Center, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, 100084, Beijing, China
| | - Baoying Huang
- Key Laboratory of Medical Virology, National Health and Family Planning Commission, National Institute for Viral Disease Control and Prevention, China CDC, 102206, Beijing, China
| | - Senyan Zhang
- The Ministry of Education Key Laboratory of Protein Science, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, Collaborative Innovation Center for Biotherapy, School of Life Sciences, Tsinghua University, 100084, Beijing, China
| | - Jun Lan
- The Ministry of Education Key Laboratory of Protein Science, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, Collaborative Innovation Center for Biotherapy, School of Life Sciences, Tsinghua University, 100084, Beijing, China
| | - Linqi Zhang
- Comprehensive AIDS Research Center, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, 100084, Beijing, China
| | - Wenjie Tan
- Key Laboratory of Medical Virology, National Health and Family Planning Commission, National Institute for Viral Disease Control and Prevention, China CDC, 102206, Beijing, China.
| | - Xinquan Wang
- The Ministry of Education Key Laboratory of Protein Science, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, Collaborative Innovation Center for Biotherapy, School of Life Sciences, Tsinghua University, 100084, Beijing, China. .,Collaborative Innovation Center for Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, 610065, Chengdu, China.
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33
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A bacterial effector deubiquitinase specifically hydrolyses linear ubiquitin chains to inhibit host inflammatory signalling. Nat Microbiol 2019; 4:1282-1293. [PMID: 31110362 DOI: 10.1038/s41564-019-0454-1] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 04/11/2019] [Indexed: 02/07/2023]
Abstract
Linear ubiquitin (Ub) chains regulate many cellular processes, including NF-κB immune signalling. Pathogenic bacteria have evolved to secrete effector proteins that harbour deubiquitinase activity into host cells to disrupt host ubiquitination signalling. All previously identified effector deubiquitinases hydrolyse isopeptide-linked polyubiquitin (polyUb). It has been a long-standing question whether bacterial pathogens have evolved an effector deubiquitinase to directly cleave linear Ub chains. In this study, we performed extensive screening of bacterial pathogens and found that Legionella pneumophila-the causative agent of human Legionnaire's disease-encodes an effector protein, RavD, which harbours deubiquitinase activity exquisitely specific for linear Ub chains. RavD hydrolyses linear Ub chains but not any type of isopeptide-linked polyUb. The crystal structure of RavD with linear diubiquitin reveals that RavD adopts a papain-like fold with a Cys-His-Ser catalytic triad. The Ub-binding surface and specific interacting residues in RavD determine its specificity for Met1 linkages. RavD prevents the accumulation of linear Ub chains on Legionella-containing vacuoles established by the pathogen in host cells to inhibit the NF-κB pathway during infection. This study identified a unique linear Ub chain-specific effector deubiquitinase and indicates its potential application as a tool to dissect linear polyUb-mediated signalling in mammalian cells.
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34
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Wan Y, Liu C, Ma Q. Structural analysis of a Vibrio phospholipase reveals an unusual Ser-His-chloride catalytic triad. J Biol Chem 2019; 294:11391-11401. [PMID: 31073025 DOI: 10.1074/jbc.ra119.008280] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 04/30/2019] [Indexed: 12/22/2022] Open
Abstract
Phospholipases can disrupt host membranes and are important virulence factors in many pathogens. VvPlpA is a phospholipase A2 secreted by Vibrio vulnificus and essential for virulence. Its homologs, termed thermolabile hemolysins (TLHs), are widely distributed in Vibrio bacteria, but no structural information for this virulence factor class is available. Herein, we report the crystal structure of VvPlpA to 1.4-Å resolution, revealing that VvPlpA contains an N-terminal domain of unknown function and a C-terminal phospholipase domain and that these two domains are packed closely together. The phospholipase domain adopts a typical SGNH hydrolase fold, containing the four conserved catalytic residues Ser, Gly, Asn, and His. Interestingly, the structure also disclosed that the phospholipase domain accommodates a chloride ion near the catalytic His residue. The chloride is five-coordinated in a distorted bipyramid geometry, accepting hydrogen bonds from a water molecule and the amino groups of surrounding residues. This chloride substitutes for the most common Asp/Glu residue and forms an unusual Ser-His-chloride catalytic triad in VvPlpA. The chloride may orient the catalytic His and stabilize the charge on its imidazole ring during catalysis. Indeed, VvPlpA activity depended on chloride concentration, confirming the important role of chloride in catalysis. The VvPlpA structure also revealed a large hydrophobic substrate-binding pocket that is capable of accommodating a long-chain acyl group. Our results provide the first structure of the TLH family and uncover an unusual Ser-His-chloride catalytic triad, expanding our knowledge on the biological role of chloride.
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Affiliation(s)
- Ye Wan
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Changshui Liu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Qingjun Ma
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China .,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.,University of Chinese Academy of Sciences, Beijing 100049, China.,Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
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35
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Guo Q, Liao S, Kwiatkowski S, Tomaka W, Yu H, Wu G, Tu X, Min J, Drozak J, Xu C. Structural insights into SETD3-mediated histidine methylation on β-actin. eLife 2019; 8:43676. [PMID: 30785395 PMCID: PMC6400499 DOI: 10.7554/elife.43676] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 02/19/2019] [Indexed: 01/01/2023] Open
Abstract
SETD3 is a member of the SET (Su(var)3–9, Enhancer of zeste, and Trithorax) domain protein superfamily and plays important roles in hypoxic pulmonary hypertension, muscle differentiation, and carcinogenesis. Previously, we identified SETD3 as the actin-specific methyltransferase that methylates the N3 of His73 on β-actin (Kwiatkowski et al., 2018). Here, we present two structures of S-adenosyl-L-homocysteine-bound SETD3 in complex with either an unmodified β-actin peptide or its His-methylated variant. Structural analyses, supported by biochemical experiments and enzyme activity assays, indicate that the recognition and methylation of β-actin by SETD3 are highly sequence specific, and that both SETD3 and β-actin adopt pronounced conformational changes upon binding to each other. In conclusion, this study is the first to show a catalytic mechanism of SETD3-mediated histidine methylation on β-actin, which not only throws light on the protein histidine methylation phenomenon but also facilitates the design of small molecule inhibitors of SETD3.
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Affiliation(s)
- Qiong Guo
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Shanhui Liao
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Sebastian Kwiatkowski
- Department of Metabolic Regulation, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Weronika Tomaka
- Department of Metabolic Regulation, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Huijuan Yu
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Gao Wu
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Xiaoming Tu
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Jinrong Min
- Structural Genomics Consortium, University of Toronto, Toronto, Canada.,Department of Physiology, University of Toronto, Toronto, Canada
| | - Jakub Drozak
- Department of Metabolic Regulation, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Chao Xu
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
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36
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Cao HY, Wang P, Peng M, Shao X, Chen XL, Li CY. Crystal structure of the dimethylsulfide monooxygenase DmoA from Hyphomicrobium sulfonivorans. Acta Crystallogr F Struct Biol Commun 2018; 74:781-786. [PMID: 30511672 PMCID: PMC6277965 DOI: 10.1107/s2053230x18015844] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 11/07/2018] [Indexed: 11/10/2022] Open
Abstract
DmoA is a monooxygenase which uses dioxygen (O2) and reduced flavin mononucleotide (FMNH2) to catalyze the oxidation of dimethylsulfide (DMS). Although it has been characterized, the structure of DmoA remains unknown. Here, the crystal structure of DmoA was determined to a resolution of 2.28 Å and was compared with those of its homologues LadA and BdsA. The results showed that their overall structures are similar: they all share a conserved TIM-barrel fold which is composed of eight α-helices and eight β-strands. In addition, they all have five additional insertions. Detailed comparison showed that the structures have notable differences despite their high sequence similarity. The substrate-binding pocket of DmoA is smaller compared with those of LadA and BdsA.
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Affiliation(s)
- Hai-Yan Cao
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People’s Republic of China
| | - Peng Wang
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People’s Republic of China
| | - Ming Peng
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People’s Republic of China
| | - Xuan Shao
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People’s Republic of China
| | - Xiu-Lan Chen
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People’s Republic of China
| | - Chun-Yang Li
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People’s Republic of China
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, People’s Republic of China
- Suzhou Institute of Shandong University, Suzhou 215123, People’s Republic of China
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Chen J, Shang F, Wang L, Zou L, Bu T, Jin L, Dong Y, Ha NC, Quan C, Nam KH, Xu Y. Structural and Biochemical Analysis of the Citrate-Responsive Mechanism of the Regulatory Domain of Catabolite Control Protein E from Staphylococcus aureus. Biochemistry 2018; 57:6054-6060. [PMID: 30252448 DOI: 10.1021/acs.biochem.8b00671] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catabolite control protein E (CcpE) is a LysR-type transcriptional regulator that positively regulates the transcription of the first two enzymes of the TCA cycle, namely, citZ and citB, by sensing accumulated intracellular citrate. CcpE comprises an N-terminal DNA-binding domain and a C-terminal regulatory domain (RD) and senses citrate with conserved arginine residues in the RD. Although the crystal structure of the apo SaCcpE-RD has been reported, the citrate-responsive and DNA-binding mechanisms by which CcpE regulates TCA activity remain unclear. Here, we report the crystal structure of the apo and citrate-bound SaCcpE-RDs. The SaCcpE-RD exhibits conformational changes between the two subdomains via hinge motion of the central β4 and β10 strands. The citrate molecule is located in a positively charged cavity between the two subdomains and interacts with the highly conserved Ser98, Leu100, Arg145, and Arg256 residues. Compared with that of the apo SaCcpE-RD, the distance between the two subdomains of the citrate-bound SaCcpE-RD is more than ∼3 Å due to the binding of the citrate molecule, and this form exhibits a closed structure. The SaCcpE-RD exhibits various citrate-binding-independent conformational changes at the contacting interface. The SaCcpE-RD prefers the dimeric state in solution, whereas the SaCcpE-FL prefers the tetrameric state. Our results provide insight into the molecular function of SaCcpE.
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Affiliation(s)
- Jinli Chen
- Department of Bioengineering, College of Life Science , Dalian Minzu University , Dalian 116600 , Liaoning , China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education , China
| | - Fei Shang
- Department of Bioengineering, College of Life Science , Dalian Minzu University , Dalian 116600 , Liaoning , China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education , China
| | - Lulu Wang
- Department of Bioengineering, College of Life Science , Dalian Minzu University , Dalian 116600 , Liaoning , China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education , China.,School of Life Science and Biotechnology , Dalian University of Technology , No. 2 Linggong Road , Dalian 116024 , Liaoning , China
| | - Linhai Zou
- Department of Bioengineering, College of Life Science , Dalian Minzu University , Dalian 116600 , Liaoning , China
| | - Tingting Bu
- Department of Bioengineering, College of Life Science , Dalian Minzu University , Dalian 116600 , Liaoning , China
| | - Liming Jin
- Department of Bioengineering, College of Life Science , Dalian Minzu University , Dalian 116600 , Liaoning , China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education , China
| | - Yuesheng Dong
- School of Life Science and Biotechnology , Dalian University of Technology , No. 2 Linggong Road , Dalian 116024 , Liaoning , China
| | - Nam-Chul Ha
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences , Seoul National University , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Chunshan Quan
- Department of Bioengineering, College of Life Science , Dalian Minzu University , Dalian 116600 , Liaoning , China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education , China
| | - Ki Hyun Nam
- Division of Biotechnology, College of Life Sciences and Biotechnology , Korea University , Seoul 02841 , Republic of Korea.,Institute of Life Science and Natural Resources , Korea University , Seoul 02841 , Republic of Korea
| | - Yongbin Xu
- Department of Bioengineering, College of Life Science , Dalian Minzu University , Dalian 116600 , Liaoning , China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education , China
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38
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Shang F, Chen J, Wang L, Jin L, Zou L, Bu T, Dong Y, Ha NC, Nam KH, Quan C, Xu Y. Crystal structure of the nicotinamidase/pyrazinamidase PncA from Bacillus subtilis. Biochem Biophys Res Commun 2018; 503:2906-2911. [PMID: 30107912 DOI: 10.1016/j.bbrc.2018.08.067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 08/07/2018] [Indexed: 11/30/2022]
Abstract
The nicotinamidase/pyrazinamidase PncA is a member of a large family of hydrolase enzymes that catalyze the deamination of nicotinamide to nicotinic acid. PncA also functions as a pyrazinamidase in a wide variety of eubacteria and is an essential coenzyme in many cellular redox reactions in living systems. We report the crystal structure of substrate-free PncA from Bacillus subtilis (BsPncA) at 2.0 Å resolution to improve our understanding of the PncA family. The structure of BsPncA consists of an α/β domain and a subdomain. The subdomain of BsPncA has a different conformation than that of PncA enzymes from other organisms. The B-factor analysis revealed a rigid structure of the α/β domain, while the subdomain is highly flexible. Both dimers and tetramers were observed in BsPncA protein crystals, but only dimers were observed in solution. Our results provide useful information that will further enhance our understanding of the molecular functions of PncA family members.
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Affiliation(s)
- Fei Shang
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian, 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China
| | - Jinli Chen
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian, 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China
| | - Lulu Wang
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian, 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China; School of Life Science and Biotechnology, Dalian University of Technology, No 2 Linggong Road, Dalian, 116024, Liaoning, China
| | - Liming Jin
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian, 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China
| | - Linhai Zou
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian, 116600, Liaoning, China
| | - Tingting Bu
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian, 116600, Liaoning, China
| | - Yuesheng Dong
- School of Life Science and Biotechnology, Dalian University of Technology, No 2 Linggong Road, Dalian, 116024, Liaoning, China
| | - Nam-Chul Ha
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Ki Hyun Nam
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea; Institute of Life Science and Natural Resources, Korea University, Seoul, 02841, Republic of Korea.
| | - Chunshan Quan
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian, 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China.
| | - Yongbin Xu
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian, 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China.
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Wang F, He Q, Yin J, Xu S, Hu W, Gu L. BrlR from Pseudomonas aeruginosa is a receptor for both cyclic di-GMP and pyocyanin. Nat Commun 2018; 9:2563. [PMID: 29967320 PMCID: PMC6028453 DOI: 10.1038/s41467-018-05004-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Accepted: 06/07/2018] [Indexed: 01/10/2023] Open
Abstract
The virulence factor pyocyanin and the intracellular second messenger cyclic diguanylate monophosphate (c-di-GMP) play key roles in regulating biofilm formation and multi-drug efflux pump expression in Pseudomonas aeruginosa. However, the crosstalk between these two signaling pathways remains unclear. Here we show that BrlR (PA4878), previously identified as a c-di-GMP responsive transcriptional regulator, acts also as a receptor for pyocyanin. Crystal structures of free BrlR and c-di-GMP-bound BrlR reveal that the DNA-binding domain of BrlR contains two separate c-di-GMP binding sites, both of which are involved in promoting brlR expression. In addition, we identify a pyocyanin-binding site on the C-terminal multidrug-binding domain based on the structure of the BrlR-C domain in complex with a pyocyanin analog. Biochemical analysis indicates that pyocyanin enhances BrlR-DNA binding and brlR expression in a concentration-dependent manner. The virulence factor pyocyanin and the second messenger c-di-GMP regulate biofilm formation and antibiotic tolerance in Pseudomonas aeruginosa. Here, the authors perform structural and biochemical analyses to show that a transcriptional regulator, BrlR, acts as a receptor for both pyocyanin and c-di-GMP.
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Affiliation(s)
- Feng Wang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100, Shandong, China
| | - Qing He
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100, Shandong, China
| | - Jia Yin
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100, Shandong, China
| | - Sujuan Xu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100, Shandong, China
| | - Wei Hu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100, Shandong, China.
| | - Lichuan Gu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100, Shandong, China.
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40
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Structural Delineation of the Neck Linker of Kinesin-3 for Processive Movement. J Mol Biol 2018; 430:2030-2041. [PMID: 29752968 DOI: 10.1016/j.jmb.2018.05.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/27/2018] [Accepted: 05/07/2018] [Indexed: 12/17/2022]
Abstract
Processive kinesin motors contain a neck linker (NL) that mediates the chemo-mechanical coupling and controls the directionality and processivity. However, kinesin-3 NL remains poorly determined due to the lack of the structural information of the junction with the following neck coil (NC). Here, we determined the structure of the motor domain (MD)-NL-NCNT tandem of KIF13B that defines the junction between NL and NC and delineates kinesin-3 NL. Unexpectedly, the length of kinesin-3 NL is much shorter than the previously predicted one. In the MD-NL-NCNT structure, NL docks onto the MD with a conventional mode but the interaction between NL and the MD is relatively weak due to the shorter N-terminal cover strand of the MD. The optimal short NL and its weak interaction with the MD would generate the tight inter-head strain and facilitate the NL undocking, which may contribute to the fast and superprocessive motility of kinesin-3.
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41
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Yu M, Dou C, Gu Y, Cheng W. Crystallization and structure analysis of the core motif of the Pks13 acyltransferase domain from Mycobacterium tuberculosis. PeerJ 2018; 6:e4728. [PMID: 29761048 PMCID: PMC5944431 DOI: 10.7717/peerj.4728] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 04/17/2018] [Indexed: 02/05/2023] Open
Abstract
Type I polyketide synthase 13 (Pks13) is involved in the final step of the biosynthesis of mycolic acid in Mycobacterium tuberculosis. Recent articles have reported that Pks13 is an essential enzyme in the mycolic acid biosynthesis pathway, and it has been deeply studied as a drug target in Tuberculosis. We report a high-resolution structure of the acyltransferase (AT) domain of Pks13 at 2.59 Å resolution. Structural comparison with the full-length AT domain (PDB code, 3TZW, and 3TZZ) reveals a different orientation of the C-terminal helix and rearrangement of some conserved residues.
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Affiliation(s)
- Mingjing Yu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Chao Dou
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Yijun Gu
- National Center for Protein Science, Shanghai, People's Republic of China
| | - Wei Cheng
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China
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42
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Chen J, Wang L, Shang F, Dong Y, Ha NC, Nam KH, Quan C, Xu Y. Crystal structure of E. coli ZinT with one zinc-binding mode and complexed with citrate. Biochem Biophys Res Commun 2018; 500:139-144. [PMID: 29596824 DOI: 10.1016/j.bbrc.2018.03.192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 03/25/2018] [Indexed: 12/31/2022]
Abstract
The ZnuABC ATP-binding cassette transporter found in gram-negative bacteria has been implicated in ensuring adequate zinc import into Zn(II)-poor environments. ZinT is an essential component of ZnuABC and contributes to metal transport by transferring metals to ZnuA, which delivers them to ZnuB in periplasmic zinc recruitment. Although several structures of E. coli ZinT have been reported, its zinc-binding sites and oligomeric state have not been clearly identified. Here, we report the crystal structure of E. coli ZinT at 1.76 Å resolution. This structure contains one zinc ion in its calycin-like domain, and this ion is coordinated by three highly conserved histidine residues (His167, His176 and His178). Moreover, three oxygen atoms (O1, O6 and O7) from the citrate molecule interact with zinc, giving the zinc ion stable octahedral coordination. Our EcZinT structure shows the fewest zinc ions bound of all reported EcZinT structures. Crystallographic packing and size exclusion chromatography suggest that EcZinT prefers to form monomers in solution. Our results provide insights into the molecular function of ZinT.
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Affiliation(s)
- Jinli Chen
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China
| | - Lulu Wang
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China; School of Life Science and Biotechnology, Dalian University of Technology, No 2 Linggong Road, Dalian 116024, Liaoning, China
| | - Fei Shang
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China
| | - Yuesheng Dong
- School of Life Science and Biotechnology, Dalian University of Technology, No 2 Linggong Road, Dalian 116024, Liaoning, China
| | - Nam-Chul Ha
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Ki Hyun Nam
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea; Institute of Life Science and Natural Resources, Korea University, Seoul 02841, Republic of Korea.
| | - Chunshan Quan
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China.
| | - Yongbin Xu
- Department of Bioengineering, College of Life Science, Dalian Minzu University, Dalian 116600, Liaoning, China; Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, China.
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Mechanism of inhibition of retromer transport by the bacterial effector RidL. Proc Natl Acad Sci U S A 2018; 115:E1446-E1454. [PMID: 29386389 DOI: 10.1073/pnas.1717383115] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Retrograde vesicle trafficking pathways are responsible for returning membrane-associated components from endosomes to the Golgi apparatus and the endoplasmic reticulum (ER), and they are critical for maintaining organelle identity, lipid homeostasis, and many other cellular functions. The retrograde transport pathway has emerged as an important target for intravacuolar bacterial pathogens. The opportunistic pathogen Legionella pneumophila exploits both the secretory and recycling branches of the vesicle transport pathway for intracellular bacterial proliferation. Its Dot/Icm effector RidL inhibits the activity of the retromer by directly engaging retromer components. However, the mechanism underlying such inhibition remains unknown. Here we present the crystal structure of RidL in complex with VPS29, a subunit of the retromer. Our results demonstrate that RidL binds to a highly conserved hydrophobic pocket of VPS29. This interaction is critical for endosomal recruitment of RidL and for its inhibitory effects. RidL inhibits retromer activity by direct competition, in which it occupies the VPS29-binding site of the essential retromer regulator TBC1d5. The mechanism of retromer inhibition by RidL reveals a hotspot on VPS29 critical for recognition by its regulators that is also exploited by pathogens, and provides a structural basis for the development of small molecule inhibitors against the retromer.
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44
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Cao HY, Wang P, Xu F, Li PY, Xie BB, Qin QL, Zhang YZ, Li CY, Chen XL. Molecular Insight into the Acryloyl-CoA Hydration by AcuH for Acrylate Detoxification in Dimethylsulfoniopropionate-Catabolizing Bacteria. Front Microbiol 2017; 8:2034. [PMID: 29089943 PMCID: PMC5651017 DOI: 10.3389/fmicb.2017.02034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 10/05/2017] [Indexed: 11/13/2022] Open
Abstract
Microbial cleavage of dimethylsulfoniopropionate (DMSP) producing dimethyl sulfide (DMS) and acrylate is an important step in global sulfur cycling. Acrylate is toxic for cells, and thus should be metabolized effectively for detoxification. There are two proposed pathways for acrylate metabolism in DMSP-catabolizing bacteria, the AcuN-AcuK pathway and the PrpE-AcuI pathway. AcuH is an acryloyl-CoA hydratase in DMSP-catabolizing bacteria and can catalyze the hydration of toxic acryloyl-CoA to produce 3-hydroxypropionyl-CoA (3-HP-CoA) in both the AcuN-AcuK pathway and the side path of the PrpE-AcuI pathway. However, the structure and catalytic mechanism of AcuH remain unknown. Here, we cloned a putative acuH gene from Roseovarius nubinhibens ISM, a typical DMSP-catabolizing bacterium, and expressed it (RdAcuH) in Escherichia coli. The activity of RdAcuH toward acryloyl-CoA was detected by liquid chromatography-mass spectrometry (LC-MS), which suggests that RdAcuH is a functional acryloyl-CoA hydratase. Then we solved the crystal structure of RdAcuH. Each asymmetric unit in the crystal of RdAcuH contains a dimer of trimers and each RdAcuH monomer contains an N-terminal domain (NTD) and a C-terminal domain (CTD). There are three active centers in each trimer and each active center is located between the NTD of a subunit and the CTD of the neighboring subunit. Site-directed mutagenesis analysis indicates that two highly conserved glutamates, Glu112 and Glu132, in the active center are essential for catalysis. Based on our results and previous research, we analyzed the catalytic mechanism of AcuH to hydrate acryloyl-CoA, in which Glu132 acts as the catalytic base. This study sheds light on the mechanism of acrylate detoxification in DMSP-catabolizing bacteria.
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Affiliation(s)
- Hai-Yan Cao
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Institute of Marine Science and Technology, Shandong University, Jinan, China
| | - Peng Wang
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Institute of Marine Science and Technology, Shandong University, Jinan, China
| | - Fei Xu
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Institute of Marine Science and Technology, Shandong University, Jinan, China
| | - Ping-Yi Li
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Institute of Marine Science and Technology, Shandong University, Jinan, China
| | - Bin-Bin Xie
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Institute of Marine Science and Technology, Shandong University, Jinan, China
| | - Qi-Long Qin
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Institute of Marine Science and Technology, Shandong University, Jinan, China
| | - Yu-Zhong Zhang
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Institute of Marine Science and Technology, Shandong University, Jinan, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Chun-Yang Li
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Institute of Marine Science and Technology, Shandong University, Jinan, China
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Institute of Marine Science and Technology, Shandong University, Jinan, China
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Xu Y, Wang L, Chen J, Zhao J, Fan S, Dong Y, Ha NC, Quan C. Structural and Functional Analyses of Periplasmic 5'-Methylthioadenosine/S-Adenosylhomocysteine Nucleosidase from Aeromonas hydrophila. Biochemistry 2017; 56:5347-5355. [PMID: 28862845 DOI: 10.1021/acs.biochem.7b00691] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Gram-negative, rod-shaped bacterium Aeromonas hydrophila has two multifunctional 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase (MTAN) enzymes, MtaN-1 and MtaN-2, that differ from those in other bacteria. These proteins are essential for several metabolic pathways, including biological methylation, polyamine biosynthesis, methionine recycling, and bacterial quorum sensing. To gain insight into how these two proteins function, we determined four high-resolution crystal structures of MtaN-1 in its apo form and in complex with the substrates S-adenosyl-l-homocysteine, 5'-methylthioadenosine, and 5'-deoxyadenosine. We found that the domain structures were generally similar, although slight differences were evident. The crystal structure demonstrates that AhMtaN-1 has an extension of the binding pocket and revealed that a tryptophan in the active site (Trp199) may play a major role in substrate binding, unlike in other MTAN proteins. Mutation of the Trp199 residue completely abolished the enzyme activity. Trp199 was identified as an active site residue that is essential for catalysis. Furthermore, biochemical characterization of AhMtaN-1 and AhMtaN-2 demonstrated that AhMtaN-1 exhibits inherent trypsin resistance that is higher than that of AhMtaN-2. Additionally, the thermally unfolded AhMtaN-2 protein is capable of refolding into active forms, whereas the thermally unfolded AhMtaN-1 protein does not have this ability. Examining the different biochemical characteristics related to the functional roles of AhMtaN-1 and AhMtaN-2 would be interesting. Indeed, the biochemical characterization of these structural features would provide a structural basis for the design of new antibiotics against A. hydrophila.
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Affiliation(s)
- Yongbin Xu
- Department of Bioengineering, College of Life Science, Dalian Minzu University , Dalian 116600, Liaoning, China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education, Dalian, China
| | - Lulu Wang
- School of Life Science and Biotechnology, Dalian University of Technology , No. 2 Linggong Road, Dalian 116024, Liaoning, China
| | - Jinli Chen
- Department of Bioengineering, College of Life Science, Dalian Minzu University , Dalian 116600, Liaoning, China
| | - Jing Zhao
- Department of Bioengineering, College of Life Science, Dalian Minzu University , Dalian 116600, Liaoning, China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education, Dalian, China
| | - Shengdi Fan
- Department of Bioengineering, College of Life Science, Dalian Minzu University , Dalian 116600, Liaoning, China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education, Dalian, China
| | - Yuesheng Dong
- School of Life Science and Biotechnology, Dalian University of Technology , No. 2 Linggong Road, Dalian 116024, Liaoning, China
| | - Nam-Chul Ha
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University , Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Chunshan Quan
- Department of Bioengineering, College of Life Science, Dalian Minzu University , Dalian 116600, Liaoning, China.,Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University) , Ministry of Education, Dalian, China
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46
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Zhang N, Yin S, Zhang W, Gong X, Zhang N, Fang K, Ge H. Crystal Structure and Biochemical Characterization of an Aminopeptidase LapB from Legionella pneumophila. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7569-7578. [PMID: 28776986 DOI: 10.1021/acs.jafc.7b02849] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Aminopeptidases are a group of exopeptidases that catalyze the removal of a wide range of N-terminal amino acid residues from peptides and proteins. They have many important commercial applications in the food industry. We determined the crystal structure of an aminopeptidase LapB from Legionella pneumophila. The overall structure reveals that the N-terminal protease-associated (PA) domain presents a new fold and shields the active site cavity of the conserved C-terminal peptidase domain. The steady-state kinetic analysis of LapB and the PA domain deletion mutant indicate that the PA domain inhibited enzyme activity of the peptidase domain. Interestingly, the activity of LapB was largely increased by various organic solvents such as ethanol, propanol, and methanol at the concentration of 60% (v/v). CD analysis provided evidence that organic solvents induce the PA domain conformational changes that eliminate the inhibition role. The unique properties indicate the application potential of LapB in the food processing industry.
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Affiliation(s)
- Nannan Zhang
- Institute of Health Sciences, School of Life Sciences, Anhui University , Hefei, Anhui 230601, China
| | - Shiyan Yin
- Institute of Health Sciences, School of Life Sciences, Anhui University , Hefei, Anhui 230601, China
| | - Wei Zhang
- Institute of Health Sciences, School of Life Sciences, Anhui University , Hefei, Anhui 230601, China
| | - Xiaojian Gong
- Institute of Health Sciences, School of Life Sciences, Anhui University , Hefei, Anhui 230601, China
| | - Na Zhang
- Institute of Health Sciences, School of Life Sciences, Anhui University , Hefei, Anhui 230601, China
| | - Kai Fang
- Institute of Health Sciences, School of Life Sciences, Anhui University , Hefei, Anhui 230601, China
| | - Honghua Ge
- Institute of Health Sciences, School of Life Sciences, Anhui University , Hefei, Anhui 230601, China
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Zhang N, Yin S, Liu S, Sun A, Zhou M, Gong X, Ge H. Crystal structure of lpg1832, a VirK family protein from Legionella pneumophila, reveals a novel fold for bacterial VirK proteins. FEBS Lett 2017; 591:2929-2935. [PMID: 28771688 DOI: 10.1002/1873-3468.12773] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Revised: 07/25/2017] [Accepted: 07/29/2017] [Indexed: 11/10/2022]
Abstract
VirK family [Pfam06903] consists of 14 bacterial VirK proteins of around 145 residues in length. The function of this family is unknown. Herein, using single-wavelength anomalous diffraction, we determined the crystal structure of lpg1832, a VirK family protein from Legionella pneumophila, at 2.0 Å resolution. This is the first structural determination of a VirK domain-containing protein. Lpg1832 is a type II secretion system-dependent extracellular protein that folds into a novel barrel-shaped structure. It is found to adopt a quaternary assembly comprising a homotetramer. The three-dimensional structure of lpg1832 provides the first structural information pertaining to the VirK family and allows us to possibly identify its functionally important regions.
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Affiliation(s)
- Nannan Zhang
- Institute of Health Sciences, School of Life Sciences, Anhui University, Hefei, China
| | - Shiyan Yin
- Institute of Health Sciences, School of Life Sciences, Anhui University, Hefei, China
| | - Shan Liu
- Institute of Health Sciences, School of Life Sciences, Anhui University, Hefei, China
| | - Aihong Sun
- Institute of Health Sciences, School of Life Sciences, Anhui University, Hefei, China
| | - Mingxue Zhou
- Institute of Health Sciences, School of Life Sciences, Anhui University, Hefei, China
| | - Xiaojian Gong
- Institute of Health Sciences, School of Life Sciences, Anhui University, Hefei, China
| | - Honghua Ge
- Institute of Health Sciences, School of Life Sciences, Anhui University, Hefei, China
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48
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Shen Q, Tan H, Xing GW, Zheng J, Jia Z. A new method to investigate the catalytic mechanism of YhdE pyrophosphatase by using a pyrophosphate fluorescence probe. Sci Rep 2017; 7:8169. [PMID: 28811554 PMCID: PMC5557916 DOI: 10.1038/s41598-017-08368-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 07/11/2017] [Indexed: 01/27/2023] Open
Abstract
YhdE is a Maf (multicopy associated filamentation) proteins from Escherichia coli which exhibits pyrophosphatase activity towards selected nucleotides, although its catalytic mechanism remains unclear. Herein we used a novel fluorescence probe (4-isoACBA–Zn(II) complex) to characterize the enzymatic properties of YhdE and its mutant, establishing a new method for assaying pyrophosphatase catalytic function. Our results reveal for the first time that the new fluorescence sensor confers high sensitivity and specificity and pyrophosphate (PPi) is the direct catalytic product of YhdE. Crystal structures of a mutant in the active-site loop (YhdE_E33A) show conformational flexibility implicated in the catalytic mechanism of YhdE. ITC experiments and computational docking further reveal that Asp70 and substrate dTTP coordinate Mn2+. Quantum mechanics calculations indicate that YhdE hydrolysis appears to follow a stepwise pathway in which a water molecule first attacks the α-phosphorus atom in the substrate, followed by the release of PPi from the pentavalent intermediate.
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Affiliation(s)
- Qingya Shen
- College of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Hongwei Tan
- College of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Guo-Wen Xing
- College of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Jimin Zheng
- College of Chemistry, Beijing Normal University, Beijing, 100875, China.
| | - Zongchao Jia
- Department of Biochemical and Molecular Science, Queen's University, Kingston, Ontario, K7L 3N6, Canada.
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49
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Wang P, Cao HY, Chen XL, Li CY, Li PY, Zhang XY, Qin QL, Todd JD, Zhang YZ. Mechanistic insight into acrylate metabolism and detoxification in marine dimethylsulfoniopropionate-catabolizing bacteria. Mol Microbiol 2017; 105:674-688. [PMID: 28598523 DOI: 10.1111/mmi.13727] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/07/2017] [Indexed: 12/24/2022]
Abstract
Dimethylsulfoniopropionate (DMSP) cleavage, yielding dimethyl sulfide (DMS) and acrylate, provides vital carbon sources to marine bacteria, is a key component of the global sulfur cycle and effects atmospheric chemistry and potentially climate. Acrylate and its metabolite acryloyl-CoA are toxic if allowed to accumulate within cells. Thus, organisms cleaving DMSP require effective systems for both the utilization and detoxification of acrylate. Here, we examine the mechanism of acrylate utilization and detoxification in Roseobacters. We propose propionate-CoA ligase (PrpE) and acryloyl-CoA reductase (AcuI) as the key enzymes involved and through structural and mutagenesis analyses, provide explanations of their catalytic mechanisms. In most cases, DMSP lyases and DMSP demethylases (DmdAs) have low substrate affinities, but AcuIs have very high substrate affinities, suggesting that an effective detoxification system for acylate catabolism exists in DMSP-catabolizing Roseobacters. This study provides insight on acrylate metabolism and detoxification and a possible explanation for the high Km values that have been noted for some DMSP lyases. Since acrylate/acryloyl-CoA is probably produced by other metabolism, and AcuI and PrpE are conserved in many organisms across all domains of life, the detoxification system is likely relevant to many metabolic processes and environments beyond DMSP catabolism.
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Affiliation(s)
- Peng Wang
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan 250100, China
| | - Hai-Yan Cao
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan 250100, China
| | - Xiu-Lan Chen
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan 250100, China
| | - Chun-Yang Li
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan 250100, China
| | - Ping-Yi Li
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan 250100, China
| | - Xi-Ying Zhang
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan 250100, China
| | - Qi-Long Qin
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan 250100, China
| | - Jonathan D Todd
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Yu-Zhong Zhang
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan 250100, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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50
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Sun Q, Yong X, Sun X, Yang F, Dai Z, Gong Y, Zhou L, Zhang X, Niu D, Dai L, Liu JJ, Jia D. Structural and functional insights into sorting nexin 5/6 interaction with bacterial effector IncE. Signal Transduct Target Ther 2017; 2:17030. [PMID: 29263922 PMCID: PMC5661634 DOI: 10.1038/sigtrans.2017.30] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 04/11/2017] [Accepted: 04/27/2017] [Indexed: 02/05/2023] Open
Abstract
The endosomal trafficking pathways are essential for many cellular activities. They are also important targets by many intracellular pathogens. Key regulators of the endosomal trafficking include the retromer complex and sorting nexins (SNXs). Chlamydia trachomatis effector protein IncE directly targets the retromer components SNX5 and SNX6 and suppresses retromer-mediated transport, but the exact mechanism has remained unclear. We present the crystal structure of the PX domain of SNX5 in complex with IncE, showing that IncE binds to a highly conserved hydrophobic groove of SNX5. The unique helical hairpin of SNX5/6 is essential for binding, explaining the specificity of SNX5/6 for IncE. The SNX5/6–IncE interaction is required for cellular localization of IncE and its inhibitory function. Mechanistically, IncE inhibits the association of CI-MPR cargo with retromer-containing endosomal subdomains. Our study provides new insights into the regulation of retromer-mediated transport and illustrates the intricate competition between host and pathogens in controlling cellular trafficking.
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Affiliation(s)
- Qingxiang Sun
- Department of Pathology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China
| | - Xin Yong
- Department of Pathology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE, Department of Paediatrics, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Xiaodong Sun
- Department of Pharmacology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Fan Yang
- Department of Pathology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE, Department of Paediatrics, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Zhonghua Dai
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yanqiu Gong
- Department of Pathology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China
| | - Liming Zhou
- Department of Pharmacology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Xia Zhang
- Department of Pathology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China
| | - Dawen Niu
- Department of Pathology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China
| | - Lunzhi Dai
- Department of Pathology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China
| | - Jia-Jia Liu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Da Jia
- Department of Pathology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE, Department of Paediatrics, West China Second University Hospital, Sichuan University, Chengdu, China
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