1
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Zoltsman G, Dang TL, Kuchersky M, Faust O, Silva MS, Ilani T, Wentink AS, Bukau B, Rosenzweig R. A unique chaperoning mechanism in class A JDPs recognizes and stabilizes mutant p53. Mol Cell 2024; 84:1512-1526.e9. [PMID: 38508184 DOI: 10.1016/j.molcel.2024.02.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 12/14/2023] [Accepted: 02/20/2024] [Indexed: 03/22/2024]
Abstract
J-domain proteins (JDPs) constitute a large family of molecular chaperones that bind a broad spectrum of substrates, targeting them to Hsp70, thus determining the specificity of and activating the entire chaperone functional cycle. The malfunction of JDPs is therefore inextricably linked to myriad human disorders. Here, we uncover a unique mechanism by which chaperones recognize misfolded clients, present in human class A JDPs. Through a newly identified β-hairpin site, these chaperones detect changes in protein dynamics at the initial stages of misfolding, prior to exposure of hydrophobic regions or large structural rearrangements. The JDPs then sequester misfolding-prone proteins into large oligomeric assemblies, protecting them from aggregation. Through this mechanism, class A JDPs bind destabilized p53 mutants, preventing clearance of these oncoproteins by Hsp70-mediated degradation, thus promoting cancer progression. Removal of the β-hairpin abrogates this protective activity while minimally affecting other chaperoning functions. This suggests the class A JDP β-hairpin as a highly specific target for cancer therapeutics.
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Affiliation(s)
- Guy Zoltsman
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 761000, Israel
| | - Thi Lieu Dang
- Center for Molecular Biology of Heidelberg University (ZMBH) and German Cancer Research Center (DKFZ), DKFZ-ZMBH-Alliance, Im Neuenheimer Feld 282, Heidelberg 69120, Germany
| | - Miriam Kuchersky
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 761000, Israel
| | - Ofrah Faust
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 761000, Israel
| | - Micael S Silva
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 761000, Israel
| | - Tal Ilani
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 761000, Israel
| | - Anne S Wentink
- Center for Molecular Biology of Heidelberg University (ZMBH) and German Cancer Research Center (DKFZ), DKFZ-ZMBH-Alliance, Im Neuenheimer Feld 282, Heidelberg 69120, Germany; Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333CC Leiden, the Netherlands
| | - Bernd Bukau
- Center for Molecular Biology of Heidelberg University (ZMBH) and German Cancer Research Center (DKFZ), DKFZ-ZMBH-Alliance, Im Neuenheimer Feld 282, Heidelberg 69120, Germany.
| | - Rina Rosenzweig
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 761000, Israel.
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2
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He C, Gu J, Wang D, Wang K, Wang Y, You Q, Wang L. Small molecules targeting molecular chaperones for tau regulation: Achievements and challenges. Eur J Med Chem 2023; 261:115859. [PMID: 37839344 DOI: 10.1016/j.ejmech.2023.115859] [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] [Received: 08/29/2023] [Revised: 09/26/2023] [Accepted: 10/05/2023] [Indexed: 10/17/2023]
Abstract
Abnormal post-translational modification of microtubule-associated protein Tau (MAPT) is a prominent pathological feature in Alzheimer's disease (AD). Previous research has focused on designing small molecules to target Tau modification, aiming to restore microtubule stability and regulate Tau levels in vivo. However, progress has been hindered, and no effective Tau-targeted drugs have been successfully marketed, which urgently requires more strategies. Heat shock proteins (HSPs), especially Hsp90 and Hsp70, have been found to play a crucial role in Tau maturation and degradation. This review explores innovative approaches using small molecules that interact with the chaperone system to regulate Tau levels. We provide a comprehensive overview of the mechanisms involving HSPs and their co-chaperones in the Tau regulation cycle. Additionally, we analyze small molecules targeting these chaperone systems to modulate Tau function. By understanding the characteristics of the molecular chaperone system and its specific impact on Tau, we aim to provide a perspective that seeks to regulate Tau levels through the manipulation of the molecular chaperone system and ultimately develop effective treatments for AD.
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Affiliation(s)
- Chenxi He
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Jinying Gu
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Danni Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Keran Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Yuxuan Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Qidong You
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
| | - Lei Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
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3
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McDonald EF, Meiler J, Plate L. CFTR Folding: From Structure and Proteostasis to Cystic Fibrosis Personalized Medicine. ACS Chem Biol 2023; 18:2128-2143. [PMID: 37730207 PMCID: PMC10595991 DOI: 10.1021/acschembio.3c00310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 08/02/2023] [Indexed: 09/22/2023]
Abstract
Cystic fibrosis (CF) is a lethal genetic disease caused by mutations in the chloride ion channel cystic fibrosis transmembrane conductance regulator (CFTR). Class-II mutants of CFTR lack intermolecular interactions important for CFTR structural stability and lead to misfolding. Misfolded CFTR is detected by a diverse suite of proteostasis factors that preferentially bind and route mutant CFTR toward premature degradation, resulting in reduced plasma membrane CFTR levels and impaired chloride ion conductance associated with CF. CF treatment has been vastly improved over the past decade by the availability of small molecules called correctors. Correctors directly bind CFTR, stabilize its structure by conferring thermodynamically favorable interactions that compensate for mutations, and thereby lead to downstream folding fidelity. However, each of over 100 Class-II CF causing mutations causes unique structural defects and shows a unique response to drug treatment, described as theratype. Understanding CFTR structural defects, the proteostasis factors evaluating those defects, and the stabilizing effects of CFTR correctors will illuminate a path toward personalized medicine for CF. Here, we review recent advances in our understanding of CFTR folding, focusing on structure, corrector binding sites, the mechanisms of proteostasis factors that evaluate CFTR, and the implications for CF personalized medicine.
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Affiliation(s)
- Eli Fritz McDonald
- Department
of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- Center
for Structural Biology, Vanderbilt University, Nashville, Tennessee 37240, United States
| | - Jens Meiler
- Department
of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- Center
for Structural Biology, Vanderbilt University, Nashville, Tennessee 37240, United States
- Department
of Pharmacology, Vanderbilt University, Nashville, Tennessee 37240, United States
- Institute
for Drug Discovery, Leipzig University, Leipzig, SAC 04103, Germany
| | - Lars Plate
- Department
of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- Department
of Biological Sciences, Vanderbilt University, Nashville, Tennessee 37235, United States
- Department
of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
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4
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Nelson B, Soper N, Lupoli TJ. Bacterial J-Domains with C-Terminal Tags Contact the Substrate Binding Domain of DnaK and Sequester Chaperone Activity. Chembiochem 2023; 24:e202300261. [PMID: 37556312 DOI: 10.1002/cbic.202300261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/11/2023]
Abstract
Functional interactions between the molecular chaperone DnaK and cofactor J-proteins (DnaJs), as well as their homologs, are crucial to the maintenance of proteostasis across cell types. In the bacterial pathogen Mycobacterium tuberculosis, DnaK-DnaJ interactions are essential for cell growth and represent potential targets for antibiotic or adjuvant development. While the N-terminal J-domains of J-proteins are known to form important contacts with DnaK, C-terminal domains have varied roles. Here, we have studied the effect of adding C-terminal tags to N-terminal J-domain truncations of mycobacterial DnaJ1 and DnaJ2 to promote additional interactions with DnaK. We found that His6 tags uniquely promote binding to additional sites in the substrate binding domain at the C-terminus of DnaK. Other C-terminal tags attached to J-domains, even peptides known to interact with DnaK, do not produce the same effects. Expression of C-terminally modified DnaJ1 or DnaJ2 J-domains in mycobacterial cells suppresses chaperone activity following proteotoxic stress, which is exaggerated in the presence of a small-molecule DnaK inhibitor. Hence, this work uncovers genetically encodable J-protein variants that may be used to study chaperone-cofactor interactions in other organisms.
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Affiliation(s)
- Brock Nelson
- Department of Chemistry, New York University, New York, 10003, USA
| | - Nathan Soper
- Department of Chemistry, New York University, New York, 10003, USA
| | - Tania J Lupoli
- Department of Chemistry, New York University, New York, 10003, USA
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5
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Velasco-Carneros L, Cuéllar J, Dublang L, Santiago C, Maréchal JD, Martín-Benito J, Maestro M, Fernández-Higuero JÁ, Orozco N, Moro F, Valpuesta JM, Muga A. The self-association equilibrium of DNAJA2 regulates its interaction with unfolded substrate proteins and with Hsc70. Nat Commun 2023; 14:5436. [PMID: 37670029 PMCID: PMC10480186 DOI: 10.1038/s41467-023-41150-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 08/24/2023] [Indexed: 09/07/2023] Open
Abstract
J-domain proteins tune the specificity of Hsp70s, engaging them in precise functions. Despite their essential role, the structure and function of many J-domain proteins remain largely unknown. We explore human DNAJA2, finding that it reversibly forms highly-ordered, tubular structures that can be dissociated by Hsc70, the constitutively expressed Hsp70 isoform. Cryoelectron microscopy and mutational studies reveal that different domains are involved in self-association. Oligomer dissociation into dimers potentiates its interaction with unfolded client proteins. The J-domains are accessible to Hsc70 within the tubular structure. They allow binding of closely spaced Hsc70 molecules that could be transferred to the unfolded substrate for its cooperative remodelling, explaining the efficient recovery of DNAJA2-bound clients. The disordered C-terminal domain, comprising the last 52 residues, regulates its holding activity and productive interaction with Hsc70. These in vitro findings suggest that the association equilibrium of DNAJA2 could regulate its interaction with client proteins and Hsc70.
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Affiliation(s)
- Lorea Velasco-Carneros
- Biofisika Institute (CSIC, UPV/EHU), University of the Basque Country, 48940, Leioa, Spain
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain
| | - Jorge Cuéllar
- Department of Macromolecular Structure, National Centre for Biotechnology (CNB-CSIC), 28049, Madrid, Spain
| | - Leire Dublang
- Biofisika Institute (CSIC, UPV/EHU), University of the Basque Country, 48940, Leioa, Spain
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain
| | - César Santiago
- Department of Macromolecular Structure, National Centre for Biotechnology (CNB-CSIC), 28049, Madrid, Spain
| | - Jean-Didier Maréchal
- Insilichem, Departament de Química, Universitat Autònoma de Barcelona, (UAB), 08193, Bellaterra (Barcelona), Spain
| | - Jaime Martín-Benito
- Department of Macromolecular Structure, National Centre for Biotechnology (CNB-CSIC), 28049, Madrid, Spain
| | - Moisés Maestro
- Department of Macromolecular Structure, National Centre for Biotechnology (CNB-CSIC), 28049, Madrid, Spain
| | - José Ángel Fernández-Higuero
- Biofisika Institute (CSIC, UPV/EHU), University of the Basque Country, 48940, Leioa, Spain
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain
| | - Natalia Orozco
- Biofisika Institute (CSIC, UPV/EHU), University of the Basque Country, 48940, Leioa, Spain
| | - Fernando Moro
- Biofisika Institute (CSIC, UPV/EHU), University of the Basque Country, 48940, Leioa, Spain
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain
| | - José María Valpuesta
- Department of Macromolecular Structure, National Centre for Biotechnology (CNB-CSIC), 28049, Madrid, Spain.
| | - Arturo Muga
- Biofisika Institute (CSIC, UPV/EHU), University of the Basque Country, 48940, Leioa, Spain.
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain.
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6
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Malinverni D, Zamuner S, Rebeaud ME, Barducci A, Nillegoda NB, De Los Rios P. Data-driven large-scale genomic analysis reveals an intricate phylogenetic and functional landscape in J-domain proteins. Proc Natl Acad Sci U S A 2023; 120:e2218217120. [PMID: 37523524 PMCID: PMC10410713 DOI: 10.1073/pnas.2218217120] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 06/23/2023] [Indexed: 08/02/2023] Open
Abstract
The 70-kD heat shock protein (Hsp70) chaperone system is a central hub of the proteostasis network that helps maintain protein homeostasis in all organisms. The recruitment of Hsp70 to perform different and specific cellular functions is regulated by the J-domain protein (JDP) co-chaperone family carrying the small namesake J-domain, required to interact and drive the ATPase cycle of Hsp70s. Besides the J-domain, prokaryotic and eukaryotic JDPs display a staggering diversity in domain architecture, function, and cellular localization. Very little is known about the overall JDP family, despite their essential role in cellular proteostasis, development, and its link to a broad range of human diseases. In this work, we leverage the exponentially increasing number of JDP gene sequences identified across all kingdoms owing to the advancements in sequencing technology and provide a broad overview of the JDP repertoire. Using an automated classification scheme based on artificial neural networks (ANNs), we demonstrate that the sequences of J-domains carry sufficient discriminatory information to reliably recover the phylogeny, localization, and domain composition of the corresponding full-length JDP. By harnessing the interpretability of the ANNs, we find that many of the discriminatory sequence positions match residues that form the interaction interface between the J-domain and Hsp70. This reveals that key residues within the J-domains have coevolved with their obligatory Hsp70 partners to build chaperone circuits for specific functions in cells.
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Affiliation(s)
- Duccio Malinverni
- Department of Structural Biology and Center for Data Driven Discovery, St. Jude Children’s Research Hospital, Memphis, TN38105
| | - Stefano Zamuner
- Institute of Physics, School of Basic Sciences, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
| | - Mathieu E. Rebeaud
- Institute of Physics, School of Basic Sciences, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
| | - Alessandro Barducci
- Centre de Biologie Structurale, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Nadinath B. Nillegoda
- Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC3800, Australia
- Centre for Dementia and Brain Repair at the Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC3800, Australia
| | - Paolo De Los Rios
- Institute of Physics, School of Basic Sciences, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
- Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
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7
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Zhang R, Malinverni D, Cyr DM, Rios PDL, Nillegoda NB. J-domain protein chaperone circuits in proteostasis and disease. Trends Cell Biol 2023; 33:30-47. [PMID: 35729039 PMCID: PMC9759622 DOI: 10.1016/j.tcb.2022.05.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/13/2022] [Accepted: 05/18/2022] [Indexed: 12/27/2022]
Abstract
The J-domain proteins (JDP) form the largest protein family among cellular chaperones. In cooperation with the Hsp70 chaperone system, these co-chaperones orchestrate a plethora of distinct functions, including those that help maintain cellular proteostasis and development. JDPs evolved largely through the fusion of a J-domain with other protein subdomains. The highly conserved J-domain facilitates the binding and activation of Hsp70s. How JDPs (re)wire Hsp70 chaperone circuits and promote functional diversity remains insufficiently explained. Here, we discuss recent advances in our understanding of the JDP family with a focus on the regulation built around J-domains to ensure correct pairing and assembly of JDP-Hsp70 machineries that operate on different clientele under various cellular growth conditions.
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Affiliation(s)
- Ruobing Zhang
- Australian Regenerative Medicine Institute (ARMI), Monash University, Melbourne, Victoria, Australia
| | - Duccio Malinverni
- MRC Laboratory of Molecular Biology, Cambridge, UK; Department of Structural Biology and Center for Data Driven Discovery, St Jude Children's Research Hospital, Memphis, TN, USA
| | - Douglas M Cyr
- Department of Cell Biology and Physiology and the Cystic Fibrosis/Pulmonary Research and Treatment Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Paolo De Los Rios
- Institute of Physics, School of Basic Sciences and Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Nadinath B Nillegoda
- Australian Regenerative Medicine Institute (ARMI), Monash University, Melbourne, Victoria, Australia.
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8
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Wang X, Broce I, Deters KD, Fan CC, Banks SJ. Identification of Sex-Specific Genetic Variants Associated With Tau PET. Neurol Genet 2022; 8:e200043. [PMID: 36530928 PMCID: PMC9756308 DOI: 10.1212/nxg.0000000000200043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/22/2022] [Indexed: 12/13/2022]
Abstract
Background and Objectives Important sex differences exist in tau pathology along the Alzheimer disease (AD) continuum, with women showing enhanced tau deposition compared with men, especially during the mild cognitive impairment (MCI) phase. This study aims to identify specific genetic variants associated with sex differences in regional tau aggregation, as measured with PET. Methods Four hundred ninety-three participants (women, n = 246; men, n = 247) who self-identified as White from the AD Neuroimaging Initiative study, with genotyping data and 18F-Flortaucipir tau PET data, were included irrespective of clinical diagnosis (cognitively normal [CN], MCI, and AD). We focused on the genetic variants within 10 genes previously shown to have sex-dependent effects on AD to reduce the burden of multiple comparisons: BIN1, MS4A6A, DNAJA2, FERMT2, APOC1, APOC1P1, FAM193B, C2orf47, TYW5, and CR1. Multivariate analysis of variance was applied to identify genetic variants associated with tau PET data in 3 regions of interests (composite regions of Braak I, Braak III/IV, and Braak V/VI stages) in women and men separately. We controlled for age, scanner manufacture, amyloid status, APOE ε4 carriership, diagnosis (CN vs MCI vs AD), and the first 10 genetic principal components to adjust for population stratification. Results We identified 3 genetic loci within 3 different genes associated with tau deposits specifically in women: rs79711283 within DNAJA2, rs113357081 within FERMT2, and rs74614106 within TYW5. In men, we also identified 3 loci within CR1 associated with tau deposits: rs115096248, rs113698814, and rs78150633. Discussion Our findings revealed sex-specific genetic variants associated with tau deposition independent of APOE ε4, amyloid status, and clinical diagnosis. These results provide potential molecular targets for understanding the mechanism of sex-specific tau aggregation and developing sex-specific gene-guided precision prevention or therapeutic interventions for AD.
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Affiliation(s)
- Xin Wang
- Department of Neurosciences (X.W., I.B., K.D.D., C.C.F., S.J.B.), University of California; and Center for Multimodal Imaging and Genetics (X.W., I.B., C.C.F., S.J.B.), University of California, San Diego, La Jolla
| | - Iris Broce
- Department of Neurosciences (X.W., I.B., K.D.D., C.C.F., S.J.B.), University of California; and Center for Multimodal Imaging and Genetics (X.W., I.B., C.C.F., S.J.B.), University of California, San Diego, La Jolla
| | - Kacie D Deters
- Department of Neurosciences (X.W., I.B., K.D.D., C.C.F., S.J.B.), University of California; and Center for Multimodal Imaging and Genetics (X.W., I.B., C.C.F., S.J.B.), University of California, San Diego, La Jolla
| | - Chun Chieh Fan
- Department of Neurosciences (X.W., I.B., K.D.D., C.C.F., S.J.B.), University of California; and Center for Multimodal Imaging and Genetics (X.W., I.B., C.C.F., S.J.B.), University of California, San Diego, La Jolla
| | - Sarah Jane Banks
- Department of Neurosciences (X.W., I.B., K.D.D., C.C.F., S.J.B.), University of California; and Center for Multimodal Imaging and Genetics (X.W., I.B., C.C.F., S.J.B.), University of California, San Diego, La Jolla
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9
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Nelson B, Hong SH, Lupoli TJ. Protein Cofactor Mimics Disrupt Essential Chaperone Function in Stressed Mycobacteria. ACS Infect Dis 2022; 8:901-910. [PMID: 35412813 DOI: 10.1021/acsinfecdis.1c00651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bacterial DnaK is an ATP-dependent molecular chaperone important for maintaining cellular proteostasis in concert with cofactor proteins. The cofactor DnaJ delivers non-native client proteins to DnaK and activates its ATPase activity, which is required for protein folding. In the bacterial pathogen Mycobacterium tuberculosis, DnaK is assisted by two DnaJs, DnaJ1 and DnaJ2. Functional protein-protein interactions (PPIs) between DnaK and at least one DnaJ are essential for survival of mycobacteria; hence, these PPIs represent untapped antibacterial targets. Here, we synthesize peptide-based mimetics of DnaJ1 and DnaJ2 N-terminal domains as rational inhibitors of DnaK-cofactor interactions. We find that covalently stabilized DnaJ mimetics are capable of disrupting DnaK-cofactor activity in vitro and prevent mycobacterial recovery from proteotoxic stress in vivo, leading to cell death. Since chaperones and cofactors are highly conserved, we anticipate these results will inform the design of other mimetics to modulate chaperone function across cell types.
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Affiliation(s)
- Brock Nelson
- Department of Chemistry, New York University, New York, New York 10003, United States
| | - Seong Ho Hong
- Department of Chemistry, New York University, New York, New York 10003, United States
| | - Tania J. Lupoli
- Department of Chemistry, New York University, New York, New York 10003, United States
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10
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Ryder BD, Wydorski PM, Hou Z, Joachimiak LA. Chaperoning shape-shifting tau in disease. Trends Biochem Sci 2022; 47:301-313. [PMID: 35045944 DOI: 10.1016/j.tibs.2021.12.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/14/2021] [Accepted: 12/16/2021] [Indexed: 02/07/2023]
Abstract
Many neurodegenerative diseases, including Alzheimer's, originate from the conversion of proteins into pathogenic conformations. The microtubule-associated protein tau converts into β-sheet-rich amyloid conformations, which underlie pathology in over 25 related tauopathies. Structural studies of tau amyloid fibrils isolated from human tauopathy tissues have revealed that tau adopts diverse structural polymorphs, each linked to a different disease. Molecular chaperones play central roles in regulating tau function and amyloid assembly in disease. New data supports the model that chaperones selectively recognize different conformations of tau to limit the accumulation of proteotoxic species. The challenge now is to understand how chaperones influence disease processes across different tauopathies, which will help guide the development of novel conformation-specific diagnostic and therapeutic strategies.
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Affiliation(s)
- Bryan D Ryder
- Molecular Biophysics Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Center for Alzheimer's and Neurodegenerative Diseases, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Pawel M Wydorski
- Molecular Biophysics Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Center for Alzheimer's and Neurodegenerative Diseases, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Zhiqiang Hou
- Center for Alzheimer's and Neurodegenerative Diseases, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Lukasz A Joachimiak
- Center for Alzheimer's and Neurodegenerative Diseases, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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11
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Hosfelt J, Richards A, Zheng M, Adura C, Nelson B, Yang A, Fay A, Resager W, Ueberheide B, Glickman JF, Lupoli TJ. An allosteric inhibitor of bacterial Hsp70 chaperone potentiates antibiotics and mitigates resistance. Cell Chem Biol 2021; 29:854-869.e9. [PMID: 34818532 DOI: 10.1016/j.chembiol.2021.11.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 09/20/2021] [Accepted: 11/02/2021] [Indexed: 12/23/2022]
Abstract
DnaK is the bacterial homolog of Hsp70, an ATP-dependent chaperone that helps cofactor proteins to catalyze nascent protein folding and salvage misfolded proteins. In the pathogen Mycobacterium tuberculosis, the causative agent of tuberculosis (TB), DnaK and its cofactors are proposed antimycobacterial targets, yet few small-molecule inhibitors or probes exist for these families of proteins. Here, we describe the repurposing of a drug called telaprevir that is able to allosterically inhibit the ATPase activity of DnaK and to prevent chaperone function by mimicking peptide substrates. In mycobacterial cells, telaprevir disrupts DnaK- and cofactor-mediated cellular proteostasis, resulting in enhanced efficacy of aminoglycoside antibiotics and reduced resistance to the frontline TB drug rifampin. Hence, this work contributes to a small but growing collection of protein chaperone inhibitors, and it demonstrates that these molecules disrupt bacterial mechanisms of survival in the presence of different antibiotic classes.
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Affiliation(s)
- Jordan Hosfelt
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Aweon Richards
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Meng Zheng
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Carolina Adura
- High-Throughput and Spectroscopy Resource Center, The Rockefeller University, New York, NY 10065, USA
| | - Brock Nelson
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Amy Yang
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Allison Fay
- Immunology Program, Sloan Kettering Insitute, New York, NY 10065, USA
| | - William Resager
- Departments of Biochemistry and Molecular Pharmacology, Neurology and Director Proteomics Lab, Division of Advanced Research Technologies, NYU Grossman School of Medicine, New York, NY 10016, USA
| | - Beatrix Ueberheide
- Departments of Biochemistry and Molecular Pharmacology, Neurology and Director Proteomics Lab, Division of Advanced Research Technologies, NYU Grossman School of Medicine, New York, NY 10016, USA
| | - J Fraser Glickman
- High-Throughput and Spectroscopy Resource Center, The Rockefeller University, New York, NY 10065, USA
| | - Tania J Lupoli
- Department of Chemistry, New York University, New York, NY 10003, USA.
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12
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Gonçalves CC, Sharon I, Schmeing TM, Ramos CHI, Young JC. The chaperone HSPB1 prepares protein aggregates for resolubilization by HSP70. Sci Rep 2021; 11:17139. [PMID: 34429462 PMCID: PMC8384840 DOI: 10.1038/s41598-021-96518-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 08/11/2021] [Indexed: 01/22/2023] Open
Abstract
In human cells under stress conditions, misfolded polypeptides can form potentially cytotoxic insoluble aggregates. To eliminate aggregates, the HSP70 chaperone machinery extracts and resolubilizes polypeptides for triage to refolding or degradation. Yeast and bacterial chaperones of the small heat-shock protein (sHSP) family can bind substrates at early stages of misfolding, during the aggregation process. The co-aggregated sHSPs then facilitate downstream disaggregation by HSP70. Because it is unknown whether a human sHSP has this activity, we investigated the disaggregation role of human HSPB1. HSPB1 co-aggregated with unfolded protein substrates, firefly luciferase and mammalian lactate dehydrogenase. The co-aggregates formed with HSPB1 were smaller and more regularly shaped than those formed in its absence. Importantly, co-aggregation promoted the efficient disaggregation and refolding of the substrates, led by HSP70. HSPB1 itself was also extracted during disaggregation, and its homo-oligomerization ability was not required. Therefore, we propose that a human sHSP is an integral part of the chaperone network for protein disaggregation.
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Affiliation(s)
- Conrado C Gonçalves
- Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Room 900, Montreal, QC, H3G 1Y6, Canada
| | - Itai Sharon
- Department of Biochemistry, McGill University, 3649 Promenade Sir William Osler, Room 457, Montreal, QC, H3G 0B1, Canada
| | - T Martin Schmeing
- Department of Biochemistry, McGill University, 3649 Promenade Sir William Osler, Room 457, Montreal, QC, H3G 0B1, Canada
| | - Carlos H I Ramos
- Institute of Chemistry, University of Campinas (UNICAMP), Campinas, SP, 13083-970, Brazil
| | - Jason C Young
- Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Room 900, Montreal, QC, H3G 1Y6, Canada.
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13
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Structural-functional diversity of malaria parasite's PfHSP70-1 and PfHSP40 chaperone pair gives an edge over human orthologs in chaperone-assisted protein folding. Biochem J 2021; 477:3625-3643. [PMID: 32893851 DOI: 10.1042/bcj20200434] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 09/02/2020] [Accepted: 09/07/2020] [Indexed: 12/13/2022]
Abstract
Plasmodium falciparum, the human malaria parasite harbors a metastable proteome which is vulnerable to proteotoxic stress conditions encountered during its lifecycle. How parasite's chaperone machinery is able to maintain its aggregation-prone proteome in functional state, is poorly understood. As HSP70-40 system forms the central hub in cellular proteostasis, we investigated the protein folding capacity of PfHSP70-1 and PfHSP40 chaperone pair and compared it with human orthologs (HSPA1A and DNAJA1). Despite the structural similarity, we observed that parasite chaperones and their human orthologs exhibit striking differences in conformational dynamics. Comprehensive biochemical investigations revealed that PfHSP70-1 and PfHSP40 chaperone pair has better protein folding, aggregation inhibition, oligomer remodeling and disaggregase activities than their human orthologs. Chaperone-swapping experiments suggest that PfHSP40 can also efficiently cooperate with human HSP70 to facilitate the folding of client-substrate. SPR-derived kinetic parameters reveal that PfHSP40 has higher binding affinity towards unfolded substrate than DNAJA1. Interestingly, the observed slow dissociation rate of PfHSP40-substrate interaction allows PfHSP40 to maintain the substrate in folding-competent state to minimize its misfolding. Structural investigation through small angle x-ray scattering gave insights into the conformational architecture of PfHSP70-1 (monomer), PfHSP40 (dimer) and their complex. Overall, our data suggest that the parasite has evolved functionally diverged and efficient chaperone machinery which allows the human malaria parasite to survive in hostile conditions. The distinct allosteric landscapes and interaction kinetics of plasmodial chaperones open avenues for the exploration of small-molecule based antimalarial interventions.
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14
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Massimino W, Davail S, Secula A, Andrieux C, Bernadet MD, Pioche T, Ricaud K, Gontier K, Morisson M, Collin A, Panserat S, Houssier M. Ontogeny of hepatic metabolism in mule ducks highlights different gene expression profiles between carbohydrate and lipid metabolic pathways. BMC Genomics 2020; 21:742. [PMID: 33109083 PMCID: PMC7590481 DOI: 10.1186/s12864-020-07093-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 09/22/2020] [Indexed: 01/03/2023] Open
Abstract
Background The production of foie gras involves different metabolic pathways in the liver of overfed ducks such as lipid synthesis and carbohydrates catabolism, but the establishment of these pathways has not yet been described with precision during embryogenesis. The early environment can have short- and long-term impacts on the physiology of many animal species and can be used to influence physiological responses that is called programming. This study proposes to describe the basal hepatic metabolism at the level of mRNA in mule duck embryos in order to reveal potential interesting programming windows in the context of foie gras production. To this end, a kinetic study was designed to determine the level of expression of selected genes involved in steatosis-related liver functions throughout embryogenesis. The livers of 20 mule duck embryos were collected every 4 days from the 12th day of embryogenesis (E12) until 4 days after hatching (D4), and gene expression analysis was performed. The expression levels of 50 mRNAs were quantified for these 7 sampling points and classified into 4 major cellular pathways. Results Interestingly, most mRNAs involved in lipid metabolism are overexpressed after hatching (FASN, SCD1, ACOX1), whereas genes implicated in carbohydrate metabolism (HK1, GAPDH, GLUT1) and development (HGF, IGF, FGFR2) are predominantly overexpressed from E12 to E20. Finally, regarding cellular stress, gene expression appears quite stable throughout development, contrasting with strong expression after hatching (CYP2E1, HSBP1, HSP90AA1). Conclusion For the first time we described the kinetics of hepatic ontogenesis at mRNA level in mule ducks and highlighted different expression patterns depending on the cellular pathway. These results could be particularly useful in the design of embryonic programming for the production of foie gras.
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Affiliation(s)
- William Massimino
- Univ Pau & Pays Adour, INRAE, E2S UPPA, UMR 1419, Nutrition, Métabolisme, Aquaculture, F-64310, Saint Pée sur Nivelle, France
| | - Stéphane Davail
- Univ Pau & Pays Adour, INRAE, E2S UPPA, UMR 1419, Nutrition, Métabolisme, Aquaculture, F-64310, Saint Pée sur Nivelle, France
| | - Aurélie Secula
- IHAP, Université de Toulouse, ENVT, INRAE, UMR 1225, 31076, Toulouse, France
| | - Charlotte Andrieux
- Univ Pau & Pays Adour, INRAE, E2S UPPA, UMR 1419, Nutrition, Métabolisme, Aquaculture, F-64310, Saint Pée sur Nivelle, France
| | - Marie-Dominique Bernadet
- INRAE Bordeaux-Aquitaine, UEPFG (Unité Expérimentale Palmipèdes à Foie Gras), Domaine d'Artiguères 1076, route de Haut Mauco, F-40280, Benquet, France
| | - Tracy Pioche
- Univ Pau & Pays Adour, INRAE, E2S UPPA, UMR 1419, Nutrition, Métabolisme, Aquaculture, F-64310, Saint Pée sur Nivelle, France
| | - Karine Ricaud
- Univ Pau & Pays Adour, INRAE, E2S UPPA, UMR 1419, Nutrition, Métabolisme, Aquaculture, F-64310, Saint Pée sur Nivelle, France
| | - Karine Gontier
- Univ Pau & Pays Adour, INRAE, E2S UPPA, UMR 1419, Nutrition, Métabolisme, Aquaculture, F-64310, Saint Pée sur Nivelle, France
| | - Mireille Morisson
- GenPhySE, Université de Toulouse, INRAE, ENVT, F-31326, Castanet Tolosan, France
| | - Anne Collin
- INRAE, Université de Tours, BOA, 37380, Nouzilly, France
| | - Stéphane Panserat
- Univ Pau & Pays Adour, INRAE, E2S UPPA, UMR 1419, Nutrition, Métabolisme, Aquaculture, F-64310, Saint Pée sur Nivelle, France
| | - Marianne Houssier
- Univ Pau & Pays Adour, INRAE, E2S UPPA, UMR 1419, Nutrition, Métabolisme, Aquaculture, F-64310, Saint Pée sur Nivelle, France.
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15
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Gonçalves CDC, Pinheiro GMS, Dahlström KM, Souto DEP, Kubota LT, Barbosa LRS, Ramos CHI. On the structure and function of Sorghum bicolor CHIP (carboxyl terminus of Hsc70-interacting protein): A link between chaperone and proteasome systems. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 296:110506. [PMID: 32540021 DOI: 10.1016/j.plantsci.2020.110506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 04/12/2020] [Accepted: 04/18/2020] [Indexed: 06/11/2023]
Abstract
The co-chaperone CHIP (carboxy terminus of Hsc70 interacting protein) is very important for many cell activities since it regulates the ubiquitination of substrates targeted for proteasomal degradation. However, information on the structure-function relationship of CHIP from plants and how it interacts and ubiquitinates other plant chaperones is still needed. For that, the CHIP ortholog from Sorghum bicolor (SbCHIP) was identified and studied in detail. SbCHIP was purified and produced folded and pure, being capable of keeping its structural conformation up to 42 °C, indicating that cellular function is maintained even in a hot environment. Also, SbCHIP was able to bind plant Hsp70 and Hsp90 with high affinity and interact with E2 enzymes, performing E3 ligase activity. The data allowed to reveal the pattern of plant Hsp70 and Hsp90 ubiquitination and described which plant E2 enzymes are likely involved in SbCHIP-mediated ubiquitination. Aditionally, we obtained information on the SbCHIP conformation, showing that it is a non-globular symmetric dimer and allowing to put forward a model for the interaction of SbCHIP with chaperones and E2 enzymes that suggests a mechanism of ubiquitination. Altogether, the results presented here are useful additions to the study of protein folding and degradation in plants.
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Affiliation(s)
| | - Glaucia M S Pinheiro
- Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP 13083-970, Brazil
| | - Käthe M Dahlström
- Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP 13083-970, Brazil
| | - Dênio E P Souto
- Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP 13083-970, Brazil
| | - Lauro T Kubota
- Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP 13083-970, Brazil
| | - Leandro R S Barbosa
- Institute of Physics, University of São Paulo-USP, São Paulo, SP 05508-090, Brazil
| | - Carlos H I Ramos
- Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP 13083-970, Brazil.
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16
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Baaklini I, Gonçalves CDC, Lukacs GL, Young JC. Selective Binding of HSC70 and its Co-Chaperones to Structural Hotspots on CFTR. Sci Rep 2020; 10:4176. [PMID: 32144307 PMCID: PMC7060200 DOI: 10.1038/s41598-020-61107-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 02/07/2020] [Indexed: 12/17/2022] Open
Abstract
Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) channel cause cystic fibrosis. Chaperones, including HSC70, DNAJA1 and DNAJA2, play key roles in both the folding and degradation of wild-type and mutant CFTR at multiple cellular locations. DNAJA1 and HSC70 promote the folding of newly synthesized CFTR at the endoplasmic reticulum (ER), but are required for the rapid turnover of misfolded channel at the plasma membrane (PM). DNAJA2 and HSC70 are also involved in the ER-associated degradation (ERAD) of misfolded CFTR, while they assist the refolding of destabilized channel at the PM. These outcomes may depend on the binding of chaperones to specific sites within CFTR, which would be exposed in non-native states. A CFTR peptide library was used to identify binding sites for HSC70, DNAJA1 and DNAJA2, validated by competition and functional assays. Each chaperone had a distinct binding pattern, and sites were distributed between the surfaces of the CFTR cytosolic domains, and domain interfaces known to be important for channel assembly. The accessibility of sites to chaperones will depend on the degree of CFTR folding or unfolding. Different folded states may be recognized by unique combinations of HSC70, DNAJA1 and DNAJA2, leading to divergent biological effects.
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Affiliation(s)
- Imad Baaklini
- McGill University, Department of Biochemistry, Montreal, H3G 1Y6, Canada
| | | | - Gergely L Lukacs
- McGill University, Department of Biochemistry, Montreal, H3G 1Y6, Canada.,McGill University, Department of Physiology, Montreal, H3G 1Y6, Canada
| | - Jason C Young
- McGill University, Department of Biochemistry, Montreal, H3G 1Y6, Canada.
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17
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Rosenzweig R, Nillegoda NB, Mayer MP, Bukau B. The Hsp70 chaperone network. Nat Rev Mol Cell Biol 2020; 20:665-680. [PMID: 31253954 DOI: 10.1038/s41580-019-0133-3] [Citation(s) in RCA: 624] [Impact Index Per Article: 156.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The 70-kDa heat shock proteins (Hsp70s) are ubiquitous molecular chaperones that act in a large variety of cellular protein folding and remodelling processes. They function virtually at all stages of the life of proteins from synthesis to degradation and are thus crucial for maintaining protein homeostasis, with direct implications for human health. A large set of co-chaperones comprising J-domain proteins and nucleotide exchange factors regulate the ATPase cycle of Hsp70s, which is allosterically coupled to substrate binding and release. Moreover, Hsp70s cooperate with other cellular chaperone systems including Hsp90, Hsp60 chaperonins, small heat shock proteins and Hsp100 AAA+ disaggregases, together constituting a dynamic and functionally versatile network for protein folding, unfolding, regulation, targeting, aggregation and disaggregation, as well as degradation. In this Review we describe recent advances that have increased our understanding of the molecular mechanisms and working principles of the Hsp70 network. This knowledge showcases how the Hsp70 chaperone system controls diverse cellular functions, and offers new opportunities for the development of chemical compounds that modulate disease-related Hsp70 activities.
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Affiliation(s)
- Rina Rosenzweig
- Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel.
| | - Nadinath B Nillegoda
- Center for Molecular Biology of Heidelberg University (ZMBH), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,DKFZ-ZMBH Alliance, Heidelberg, Germany.,Australian Regenerative Medicine Institute (ARMI), Monash University, Clayton, VIC, Australia
| | - Matthias P Mayer
- Center for Molecular Biology of Heidelberg University (ZMBH), Heidelberg, Germany.,DKFZ-ZMBH Alliance, Heidelberg, Germany
| | - Bernd Bukau
- Center for Molecular Biology of Heidelberg University (ZMBH), Heidelberg, Germany. .,German Cancer Research Center (DKFZ), Heidelberg, Germany. .,DKFZ-ZMBH Alliance, Heidelberg, Germany.
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18
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Dom M, Vanden Berghe W, Van Ostade X. Broad-spectrum antitumor properties of Withaferin A: a proteomic perspective. RSC Med Chem 2020; 11:30-50. [PMID: 33479603 PMCID: PMC7523023 DOI: 10.1039/c9md00296k] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 11/21/2019] [Indexed: 12/11/2022] Open
Abstract
The multifunctional antitumor properties of Withaferin A (WA), the manifold studied bioactive compound of the plant Withania somnifera, have been well established in many different in vitro and in vivo cancer models. This undoubtedly has led to a much better insight in the underlying mechanisms of WAs broad antitumor activity range, but also raises additional challenging questions on how all these antitumor properties could be explained on a molecular level. Therefore, a lot of effort was made to characterize the cellular WA target proteins, since these binding events will lead and initiate the observed downstream effects. Based on a proteomic perspective, this review provides novel insights in the molecular chain of events by which WA potentially exercises its antitumor activities. We illustrate that WA triggers multiple cellular stress pathways such as the NRF2-mediated oxidative stress response, the heat shock response and protein translation events and at the same time inhibits these cellular protection mechanisms, driving stressed cancer cells towards a fatal state of collapse. If cancer cells manage to restore homeostasis and survive, a stress-independent WA antitumor response comes into play. These include the known inhibition of cytoskeleton proteins, NFκB pathway inhibition and cell cycle inhibition, among others. This review therefore provides a comprehensive overview which integrates the numerous WA-protein binding partners to formulate a general WA antitumor mechanism.
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Affiliation(s)
- Martin Dom
- Laboratory of Protein Chemistry , Proteomics and Epigenetic Signalling (PPES) , Department of Biomedical Sciences , University of Antwerp (UA) , Universiteitsplein 1 , 2610 Wilrijk , Belgium . ; Tel: +3232562319
| | - Wim Vanden Berghe
- Laboratory of Protein Chemistry , Proteomics and Epigenetic Signalling (PPES) , Department of Biomedical Sciences , University of Antwerp (UA) , Universiteitsplein 1 , 2610 Wilrijk , Belgium . ; Tel: +3232562319
| | - Xaveer Van Ostade
- Laboratory of Protein Chemistry , Proteomics and Epigenetic Signalling (PPES) , Department of Biomedical Sciences , University of Antwerp (UA) , Universiteitsplein 1 , 2610 Wilrijk , Belgium . ; Tel: +3232562319
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19
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Kim Chiaw P, Hantouche C, Wong MJH, Matthes E, Robert R, Hanrahan JW, Shrier A, Young JC. Hsp70 and DNAJA2 limit CFTR levels through degradation. PLoS One 2019; 14:e0220984. [PMID: 31408507 PMCID: PMC6692068 DOI: 10.1371/journal.pone.0220984] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 07/26/2019] [Indexed: 11/18/2022] Open
Abstract
Cystic Fibrosis is caused by mutations in the CFTR anion channel, many of which cause its misfolding and degradation. CFTR folding depends on the Hsc70 and Hsp70 chaperones and their co-chaperone DNAJA1, but Hsc70/Hsp70 is also involved in CFTR degradation. Here, we address how these opposing functions are balanced. DNAJA2 and DNAJA1 were both important for CFTR folding, however overexpressing DNAJA2 but not DNAJA1 enhanced CFTR degradation at the endoplasmic reticulum by Hsc70/Hsp70 and the E3 ubiquitin ligase CHIP. Excess Hsp70 also promoted CFTR degradation, but this occurred through the lysosomal pathway and required CHIP but not complex formation with HOP and Hsp90. Notably, the Hsp70 inhibitor MKT077 enhanced levels of mature CFTR and the most common disease variant ΔF508-CFTR, by slowing turnover and allowing delayed maturation, respectively. MKT077 also boosted the channel activity of ΔF508-CFTR when combined with the corrector compound VX809. Thus, the Hsp70 system is the major determinant of CFTR degradation, and its modulation can partially relieve the misfolding phenotype.
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Affiliation(s)
- Patrick Kim Chiaw
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec, Canada
| | - Christine Hantouche
- Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec, Canada
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - Michael J. H. Wong
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec, Canada
| | - Elizabeth Matthes
- Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec, Canada
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - Renaud Robert
- Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec, Canada
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - John W. Hanrahan
- Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec, Canada
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - Alvin Shrier
- Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec, Canada
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - Jason C. Young
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec, Canada
- * E-mail:
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20
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Hughes S, Vrinds I, de Roo J, Francke C, Shimeld SM, Woollard A, Sato A. DnaJ chaperones contribute to canalization. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART A, ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY 2019; 331:201-212. [PMID: 30653842 DOI: 10.1002/jez.2254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 12/17/2018] [Accepted: 12/18/2018] [Indexed: 01/04/2023]
Abstract
Canalization, an intrinsic robustness of development to external (environmental) or internal (genetic) perturbations, was first proposed over half a century ago. However, whether the robustness to environmental stress (environmental canalization [EC]) and to genetic variation (genetic canalization) are underpinned by the same molecular basis remains elusive. The recent discovery of the involvement of two endoplasmic reticulum (ER)-associated DnaJ genes in developmental buffering, orthologues of which are conserved across Metazoa, indicates that the role of ER-associated DnaJ genes might be conserved across the animal kingdom. To test this, we surveyed the ER-associated DnaJ chaperones in the nematode Caenorhabditis elegans. We then quantified the phenotype, in the form of variance and mean of seam cell counts, from RNA interference knockdown of DnaJs under three different temperatures. We find that seven out of eight ER-associated DnaJs are involved in either EC or microenvironmental canalization. Moreover, we also found two DnaJ genes not specifically associated with ER (DNAJC2/dnj-11 and DNAJA2/dnj-19) were involved in canalization. Protein expression pattern showed that these DnaJs are upregulated by heat stress, yet not all of them are expressed in the seam cells. Moreover, we found that most of the buffering DnaJs also control lifespan. We therefore concluded that a number of DnaJ chaperones, not limited to those associated with the ER, are involved in canalization as a part of the complex system that underlies development.
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Affiliation(s)
- Samantha Hughes
- HAN BioCentre, HAN University of Applied Science, Isnstitute of Applied Biosciences and Chemistry, Nijmegen, The Netherlands
| | - Inge Vrinds
- HAN BioCentre, HAN University of Applied Science, Isnstitute of Applied Biosciences and Chemistry, Nijmegen, The Netherlands
| | - Joris de Roo
- HAN BioCentre, HAN University of Applied Science, Isnstitute of Applied Biosciences and Chemistry, Nijmegen, The Netherlands
| | - Christof Francke
- HAN BioCentre, HAN University of Applied Science, Isnstitute of Applied Biosciences and Chemistry, Nijmegen, The Netherlands
| | | | - Alison Woollard
- Department of Biochemistry, University of Oxford, Oxford, UK
| | - Atsuko Sato
- Department of Biology, Ochanomizu University, Tokyo, Japan
- Institute for Human Life Innovation, Ochanomizu University, Tokyo, Japan
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21
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Kampinga HH, Andreasson C, Barducci A, Cheetham ME, Cyr D, Emanuelsson C, Genevaux P, Gestwicki JE, Goloubinoff P, Huerta-Cepas J, Kirstein J, Liberek K, Mayer MP, Nagata K, Nillegoda NB, Pulido P, Ramos C, De Los Rios P, Rospert S, Rosenzweig R, Sahi C, Taipale M, Tomiczek B, Ushioda R, Young JC, Zimmermann R, Zylicz A, Zylicz M, Craig EA, Marszalek J. Function, evolution, and structure of J-domain proteins. Cell Stress Chaperones 2019; 24:7-15. [PMID: 30478692 PMCID: PMC6363617 DOI: 10.1007/s12192-018-0948-4] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2018] [Indexed: 01/06/2023] Open
Abstract
Hsp70 chaperone systems are very versatile machines present in nearly all living organisms and in nearly all intracellular compartments. They function in many fundamental processes through their facilitation of protein (re)folding, trafficking, remodeling, disaggregation, and degradation. Hsp70 machines are regulated by co-chaperones. J-domain containing proteins (JDPs) are the largest family of Hsp70 co-chaperones and play a determining role functionally specifying and directing Hsp70 functions. Many features of JDPs are not understood; however, a number of JDP experts gathered at a recent CSSI-sponsored workshop in Gdansk (Poland) to discuss various aspects of J-domain protein function, evolution, and structure. In this report, we present the main findings and the consensus reached to help direct future developments in the field of Hsp70 research.
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Affiliation(s)
- Harm H Kampinga
- Department of Cell Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - Claes Andreasson
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Alessandro Barducci
- Inserm, U1054, CNRS, UMR 5048, Centre de Biochimie Structurale, Universite de Montpellier, Montpellier, France
| | | | - Douglas Cyr
- University of North Carolina, Chapel Hill, NC, USA
| | - Cecilia Emanuelsson
- Center for Molecular Protein Sciences, CMPS, Dept. Biochemistry and Structural Biology, Lund University, Lund, Sweden
| | - Pierre Genevaux
- Laboratoire de Microbiologie et de Génétique Moléculaires, Centre de Biologie Intégrative (CBI), CNRS-Université de Toulouse, 118 route de Narbonne, 31062, Toulouse Cedex 9, France
| | - Jason E Gestwicki
- Institute for Neurodegenerative Diseases, University of California, San Francisco, CA, USA
| | - Pierre Goloubinoff
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | | | - Janine Kirstein
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V. (FMP), Berlin, Germany
| | - Krzysztof Liberek
- Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307, Gdansk, Poland
| | - Matthias P Mayer
- Center for Molecular Biology of Heidelberg University (ZMBH), Heidelberg, Germany
| | - Kazuhiro Nagata
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, 603-8555, Japan
| | - Nadinath B Nillegoda
- Center for Molecular Biology of Heidelberg University (ZMBH), Heidelberg, Germany
- Australian Regenerative Medicine Institute (ARMI), Monash University, 15 Innovative Walk, Wellington Road, Clayton, VIC, 3800, Australia
| | - Pablo Pulido
- Plant Molecular Biology, Faculty of Biology, Ludwig-Maximilians-University, Planegg-Martinsried, 82152, Munich, Germany
| | - Carlos Ramos
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, SP, Brazil
| | - Paolo De Los Rios
- EPFL SB IPHYS LBS BSP 723 (Cubotron UNIL), Rte de la Sorge, CH-1015, Lausanne, Switzerland
| | - Sabine Rospert
- Institut fur Biochemie und Molekularbiologie, Universitat Freiburg, Freiburg, Germany
| | | | - Chandan Sahi
- Indian Institute of Science Education and Research Bhopal, Bhauri Bhopal, Madhya Pradesh, 462 066, India
| | - Mikko Taipale
- Donnelly Centre for Cellular and Biomolecular Research, Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Bratłomiej Tomiczek
- Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307, Gdansk, Poland
| | - Ryo Ushioda
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, 603-8555, Japan
| | - Jason C Young
- Department of Biochemistry, McGill University, Montreal, Canada
| | - Richard Zimmermann
- Medical Biochemistry and Molecular Biology, Saarland University, 66421, Homburg, Germany
| | - Alicja Zylicz
- International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Maciej Zylicz
- International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Elizabeth A Craig
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
| | - Jaroslaw Marszalek
- Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307, Gdansk, Poland
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Ajayi OO, Peters SO, De Donato M, Mujibi FD, Khan WA, Hussain T, Babar ME, Imumorin IG, Thomas BN. Genetic variation in N- and C-terminal regions of bovine DNAJA1 heat shock protein gene in African, Asian and American cattle. J Genomics 2018; 6:1-8. [PMID: 29290829 PMCID: PMC5744232 DOI: 10.7150/jgen.23248] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 11/18/2017] [Indexed: 11/12/2022] Open
Abstract
DNAJA1 or heat shock protein 40 (Hsp40) is associated with heat adaptation in various organisms. We amplified and sequenced a total of 1,142 bp of bovine Hsp40 gene representing the critical N-terminal (NTR) and C-terminal (CTR) regions in representative samples of African, Asian and American cattle breeds. Eleven and 9 different haplotypes were observed in the NTR in Asian and African breeds respectively while in American Brangus, only two mutations were observed resulting in two haplotypes. The CTR appears to be highly conserved between cattle and yak. In-silico functional analysis with PANTHER predicted putative deleterious functional impact of c.161 T>A; p. V54Q while alignment of bovine and human NTR-J domains revealed that p.Q19H, p.E20Q and p. E21X mutations occurred in helix 2 and p.V54Q missense mutation occurred in helix 3 respectively. The 124 bp insertion found in the yak DNAJA1 ortholog may have significant functional relevance warranting further investigation. Our results suggest that these genetic differences may be concomitant with population genetic history and possible functional consequences for climate adaptation in bovidae.
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Affiliation(s)
- Oyeyemi O. Ajayi
- Animal Genetics and Genomics Laboratory, International Programs, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
| | - Sunday O. Peters
- Department of Animal Science, Berry College, Mount Berry, GA 30149
- Department of Animal and Dairy Science, University of Georgia, Athens, GA 30602
| | - Marcos De Donato
- Animal Genetics and Genomics Laboratory, International Programs, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
- Departamento Regional de Bioingenierias, Instituto Tecnologico y de Estudios Superiores de Monterrey, Queretaro, Mexico
| | - F. Denis Mujibi
- Usomi Ltd., PO Box 105086-00101, Ushirika Road, Karen, Nairobi, Kenya
| | - Waqas A. Khan
- Animal Genetics and Genomics Laboratory, International Programs, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
- Department of Biotechnology, University of Sargodha, Sargodha, Pakistan
| | - Tanveer Hussain
- Animal Genetics and Genomics Laboratory, International Programs, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
- Department of Molecular Biology, Virtual University of Pakistan, Lahore, Pakistan
| | - Masroor E. Babar
- African Institute for Biosciences Research and Training, Ibadan, Nigeria
| | - Ikhide G. Imumorin
- Animal Genetics and Genomics Laboratory, International Programs, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332
- African Institute for Biosciences Research and Training, Ibadan, Nigeria
| | - Bolaji N. Thomas
- Department of Biomedical Sciences, Rochester Institute of Technology, Rochester NY, 14623
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23
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Bentley SJ, Boshoff A. Hsp70/J-protein machinery from Glossina morsitans morsitans, vector of African trypanosomiasis. PLoS One 2017; 12:e0183858. [PMID: 28902917 PMCID: PMC5597180 DOI: 10.1371/journal.pone.0183858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 08/11/2017] [Indexed: 11/18/2022] Open
Abstract
Tsetse flies (Glossina spp.) are the sole vectors of the protozoan parasites of the genus Trypanosoma, the causative agents of African Trypanosomiasis. Species of Glossina differ in vector competence and Glossina morsitans morsitans is associated with transmission of Trypanosoma brucei rhodesiense, which causes an acute and often fatal form of African Trypanosomiasis. Heat shock proteins are evolutionarily conserved proteins that play critical roles in proteostasis. The activity of heat shock protein 70 (Hsp70) is regulated by interactions with its J-protein (Hsp40) co-chaperones. Inhibition of these interactions are emerging as potential therapeutic targets. The assembly and annotation of the G. m. morsitans genome provided a platform to identify and characterize the Hsp70s and J-proteins, and carry out an evolutionary comparison to its well-studied eukaryotic counterparts, Drosophila melanogaster and Homo sapiens, as well as Stomoxys calcitrans, a comparator species. In our study, we identified 9 putative Hsp70 proteins and 37 putative J-proteins in G. m. morsitans. Phylogenetic analyses revealed three evolutionarily distinct groups of Hsp70s, with a closer relationship to orthologues from its blood-feeding dipteran relative Stomoxys calcitrans. G. m. morsitans also lacked the high number of heat inducible Hsp70s found in D. melanogaster. The potential localisations, functions, domain organisations and Hsp70/J-protein partnerships were also identified. A greater understanding of the heat shock 70 (Hsp70) and J-protein (Hsp40) families in G. m. morsitans could enhance our understanding of the cell biology of the tsetse fly.
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Affiliation(s)
- Stephen J. Bentley
- Biotechnology Innovation Centre, Rhodes University, Grahamstown, South Africa
| | - Aileen Boshoff
- Biotechnology Innovation Centre, Rhodes University, Grahamstown, South Africa
- * E-mail:
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24
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Chaperones rescue the energetic landscape of mutant CFTR at single molecule and in cell. Nat Commun 2017; 8:398. [PMID: 28855508 PMCID: PMC5577305 DOI: 10.1038/s41467-017-00444-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 06/29/2017] [Indexed: 12/14/2022] Open
Abstract
Molecular chaperones are pivotal in folding and degradation of the cellular proteome but their impact on the conformational dynamics of near-native membrane proteins with disease relevance remains unknown. Here we report the effect of chaperone activity on the functional conformation of the temperature-sensitive mutant cystic fibrosis channel (∆F508-CFTR) at the plasma membrane and after reconstitution into phospholipid bilayer. Thermally induced unfolding at 37 °C and concomitant functional inactivation of ∆F508-CFTR are partially suppressed by constitutive activity of Hsc70 and Hsp90 chaperone/co-chaperone at the plasma membrane and post-endoplasmic reticulum compartments in vivo, and at single-molecule level in vitro, indicated by kinetic and thermodynamic remodeling of the mutant gating energetics toward its wild-type counterpart. Thus, molecular chaperones can contribute to functional maintenance of ∆F508-CFTR by reshaping the conformational energetics of its final fold, a mechanism with implication in the regulation of metastable ABC transporters and other plasma membrane proteins activity in health and diseases. The F508 deletion (F508del) in the cystic fibrosis transmembrane conductance regulator (CFTR) is the most common CF causing mutation. Here the authors show that cytosolic chaperones shift the F508del channel conformation to the native fold by kinetic and thermodynamic remodelling of the gating energetics towards that of wild-type CTFR.
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25
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Hantouche C, Williamson B, Valinsky WC, Solomon J, Shrier A, Young JC. Bag1 Co-chaperone Promotes TRC8 E3 Ligase-dependent Degradation of Misfolded Human Ether a Go-Go-related Gene (hERG) Potassium Channels. J Biol Chem 2016; 292:2287-2300. [PMID: 27998983 DOI: 10.1074/jbc.m116.752618] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 12/02/2016] [Indexed: 11/06/2022] Open
Abstract
Cardiac long QT syndrome type 2 is caused by mutations in the human ether a go-go-related gene (hERG) potassium channel, many of which cause misfolding and degradation at the endoplasmic reticulum instead of normal trafficking to the cell surface. The Hsc70/Hsp70 chaperones assist the folding of the hERG cytosolic domains. Here, we demonstrate that the Hsp70 nucleotide exchange factor Bag1 promotes hERG degradation by the ubiquitin-proteasome system at the endoplasmic reticulum to regulate hERG levels and channel activity. Dissociation of hERG complexes containing Hsp70 and the E3 ubiquitin ligase CHIP requires the interaction of Bag1 with Hsp70, but this does not involve the Bag1 ubiquitin-like domain. The interaction with Bag1 then shifts hERG degradation to the membrane-anchored E3 ligase TRC8 and its E2-conjugating enzyme Ube2g2, as determined by siRNA screening. TRC8 interacts through the transmembrane region with hERG and decreases hERG functional expression. TRC8 also mediates degradation of the misfolded hERG-G601S disease mutant, but pharmacological stabilization of the mutant structure prevents degradation. Our results identify TRC8 as a previously unknown Hsp70-independent quality control E3 ligase for hERG.
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Affiliation(s)
- Christine Hantouche
- From the Departments of Physiology and.,Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec H3G 0B1, Canada
| | - Brittany Williamson
- Biochemistry and.,Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec H3G 0B1, Canada
| | - William C Valinsky
- From the Departments of Physiology and.,Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec H3G 0B1, Canada
| | - Joshua Solomon
- From the Departments of Physiology and.,Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec H3G 0B1, Canada
| | - Alvin Shrier
- From the Departments of Physiology and .,Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec H3G 0B1, Canada
| | - Jason C Young
- Biochemistry and .,Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, Quebec H3G 0B1, Canada
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26
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Reconstitution of a Mycobacterium tuberculosis proteostasis network highlights essential cofactor interactions with chaperone DnaK. Proc Natl Acad Sci U S A 2016; 113:E7947-E7956. [PMID: 27872278 DOI: 10.1073/pnas.1617644113] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
During host infection, Mycobacterium tuberculosis (Mtb) encounters several types of stress that impair protein integrity, including reactive oxygen and nitrogen species and chemotherapy. The resulting protein aggregates can be resolved or degraded by molecular machinery conserved from bacteria to eukaryotes. Eukaryotic Hsp104/Hsp70 and their bacterial homologs ClpB/DnaK are ATP-powered chaperones that restore toxic protein aggregates to a native folded state. DnaK is essential in Mycobacterium smegmatis, and ClpB is involved in asymmetrically distributing damaged proteins during cell division as a mechanism of survival in Mtb, commending both proteins as potential drug targets. However, their molecular partners in protein reactivation have not been characterized in mycobacteria. Here, we reconstituted the activities of the Mtb ClpB/DnaK bichaperone system with the cofactors DnaJ1, DnaJ2, and GrpE and the small heat shock protein Hsp20. We found that DnaJ1 and DnaJ2 activate the ATPase activity of DnaK differently. A point mutation in the highly conserved HPD motif of the DnaJ proteins abrogates their ability to activate DnaK, although the DnaJ2 mutant still binds to DnaK. The purified Mtb ClpB/DnaK system reactivated a heat-denatured model substrate, but the DnaJ HPD mutants inhibited the reaction. Finally, either DnaJ1 or DnaJ2 is required for mycobacterial viability, as is the DnaK-activating activity of a DnaJ protein. These studies lay the groundwork for strategies to target essential chaperone-protein interactions in Mtb, the leading cause of death from a bacterial infection.
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27
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Jiang G, Rowarth NM, Panchakshari S, MacRae TH. ArHsp40, a type 1 J-domain protein, is developmentally regulated and stress inducible in post-diapause Artemia franciscana. Cell Stress Chaperones 2016; 21:1077-1088. [PMID: 27581971 PMCID: PMC5083676 DOI: 10.1007/s12192-016-0732-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 08/12/2016] [Accepted: 08/18/2016] [Indexed: 01/01/2023] Open
Abstract
Upon diapause termination and exposure to favorable environmental conditions, cysts of the crustacean Artemia franciscana reinitiate development, a process dependent on the resumption of metabolic activity and the maintenance of protein homeostasis. The objective of the work described herein was to characterize molecular chaperones during post-diapause growth of A. franciscana. An Hsp40 complementary DNA (cDNA) termed ArHsp40 was cloned and shown to encode a protein with an amino-terminal J-domain containing a conserved histidine, proline, and aspartic acid (HPD) motif. Following the J-domain was a Gly/Phe (G/F) rich domain, a zinc-binding domain which contained a modified CXXCXGXG motif, and the carboxyl-terminal substrate binding region, all characteristics of type I Hsp40. Multiple alignment and protein modeling showed that ArHsp40 is comparable to Hsp40s from other eukaryotes and likely to be functionally similar. qRT-PCR revealed that during post-diapause development, ArHsp40 messenger RNA (mRNA) varied slightly until the E2/E3 stage and decreased significantly upon hatching. The immunoprobing of Western blots demonstrated that ArHsp40 was also relatively constant until E2/E3 and then declined dramatically. The drop in ArHsp40 when metabolism and protein synthesis were increasing was unexpected and demonstrated developmental regulation. The reduction in ArHsp40 at such an active life history stage indicates, as one possibility, that A. franciscana possesses additional Hsp40s, one or more of which replaces ArHsp40 as development progresses. Increased synthesis upon heat shock established that in addition to being developmentally regulated, ArHsp40 is stress inducible and, because it is found in mature cysts, ArHsp40 has the potential to contribute to stress tolerance during diapause.
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Affiliation(s)
- Guojian Jiang
- Department of Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada
- College of Marine Life Sciences, Ocean University of China, No. 5, Yushan, RD, Qingdao, 266003, China
| | - Nathan M Rowarth
- Department of Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | | | - Thomas H MacRae
- Department of Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada.
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28
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Foo B, Williamson B, Young JC, Lukacs G, Shrier A. hERG quality control and the long QT syndrome. J Physiol 2016; 594:2469-81. [PMID: 26718903 DOI: 10.1113/jp270531] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 12/07/2015] [Indexed: 11/08/2022] Open
Abstract
Long-QT syndrome type-2 (LQT2) is characterized by reduced functional expression of the human ether-à-go-go related (hERG) gene product, resulting in impaired cardiac repolarization and predisposition to fatal arrhythmia. Previous studies have implicated abnormal trafficking of misfolded hERG as the primary mechanism of LQT2, with misfolding being caused by mutations in the hERG gene (inherited) or drug treatment (acquired). More generally, environmental and metabolic stresses present a constant challenge to the folding of proteins, including hERG, and must be countered by robust protein quality control (QC) systems. Disposal of partially unfolded yet functional plasma membrane (PM) proteins by protein QC contributes to the loss-of-function phenotype in various conformational diseases including cystic fibrosis (CF) and long-QT syndrome type-2 (LQT2). The prevalent view has been that the loss of PM expression of hERG is attributed to biosynthetic block by endoplasmic reticulum (ER) QC pathways. However, there is a growing appreciation for protein QC pathways acting at post-ER cellular compartments, which may contribute to conformational disease pathogenesis. This article will provide a background on the structure and cellular trafficking of hERG as well as inherited and acquired LQT2. We will review previous work on hERG ER QC and introduce the more novel view that there is a significant peripheral QC at the PM and peripheral cellular compartments. Particular attention is drawn to the unique role of the peripheral QC system in acquired LQT2. Understanding the QC process and players may provide targets for therapeutic intervention in dealing with LQT2.
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Affiliation(s)
- Brian Foo
- Department of Physiology, McGill University, Montréal, Québec, Canada, H3G 1Y6
| | - Brittany Williamson
- Department of Biochemistry, McGill University, Montréal, Québec, Canada, H3G 1Y6
| | - Jason C Young
- Department of Biochemistry, McGill University, Montréal, Québec, Canada, H3G 1Y6
| | - Gergely Lukacs
- Department of Physiology, McGill University, Montréal, Québec, Canada, H3G 1Y6
| | - Alvin Shrier
- Department of Physiology, McGill University, Montréal, Québec, Canada, H3G 1Y6
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29
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Khachatoorian R, French SW. Chaperones in hepatitis C virus infection. World J Hepatol 2016; 8:9-35. [PMID: 26783419 PMCID: PMC4705456 DOI: 10.4254/wjh.v8.i1.9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 10/01/2015] [Accepted: 12/18/2015] [Indexed: 02/06/2023] Open
Abstract
The hepatitis C virus (HCV) infects approximately 3% of the world population or more than 185 million people worldwide. Each year, an estimated 350000-500000 deaths occur worldwide due to HCV-associated diseases including cirrhosis and hepatocellular carcinoma. HCV is the most common indication for liver transplantation in patients with cirrhosis worldwide. HCV is an enveloped RNA virus classified in the genus Hepacivirus in the Flaviviridae family. The HCV viral life cycle in a cell can be divided into six phases: (1) binding and internalization; (2) cytoplasmic release and uncoating; (3) viral polyprotein translation and processing; (4) RNA genome replication; (5) encapsidation (packaging) and assembly; and (6) virus morphogenesis (maturation) and secretion. Many host factors are involved in the HCV life cycle. Chaperones are an important group of host cytoprotective molecules that coordinate numerous cellular processes including protein folding, multimeric protein assembly, protein trafficking, and protein degradation. All phases of the viral life cycle require chaperone activity and the interaction of viral proteins with chaperones. This review will present our current knowledge and understanding of the role of chaperones in the HCV life cycle. Analysis of chaperones in HCV infection will provide further insights into viral/host interactions and potential therapeutic targets for both HCV and other viruses.
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30
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Mahboubi H, Barisé R, Stochaj U. 5′-AMP-activated protein kinase alpha regulates stress granule biogenesis. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2015; 1853:1725-37. [DOI: 10.1016/j.bbamcr.2015.03.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Revised: 03/12/2015] [Accepted: 03/26/2015] [Indexed: 12/22/2022]
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31
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Young JC. The role of the cytosolic HSP70 chaperone system in diseases caused by misfolding and aberrant trafficking of ion channels. Dis Model Mech 2015; 7:319-29. [PMID: 24609033 PMCID: PMC3944492 DOI: 10.1242/dmm.014001] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Protein-folding diseases are an ongoing medical challenge. Many diseases within this group are genetically determined, and have no known cure. Among the examples in which the underlying cellular and molecular mechanisms are well understood are diseases driven by misfolding of transmembrane proteins that normally function as cell-surface ion channels. Wild-type forms are synthesized and integrated into the endoplasmic reticulum (ER) membrane system and, upon correct folding, are trafficked by the secretory pathway to the cell surface. Misfolded mutant forms traffic poorly, if at all, and are instead degraded by the ER-associated proteasomal degradation (ERAD) system. Molecular chaperones can assist the folding of the cytosolic domains of these transmembrane proteins; however, these chaperones are also involved in selecting misfolded forms for ERAD. Given this dual role of chaperones, diseases caused by the misfolding and aberrant trafficking of ion channels (referred to here as ion-channel-misfolding diseases) can be regarded as a consequence of insufficiency of the pro-folding chaperone activity and/or overefficiency of the chaperone ERAD role. An attractive idea is that manipulation of the chaperones might allow increased folding and trafficking of the mutant proteins, and thereby partial restoration of function. This Review outlines the roles of the cytosolic HSP70 chaperone system in the best-studied paradigms of ion-channel-misfolding disease--the CFTR chloride channel in cystic fibrosis and the hERG potassium channel in cardiac long QT syndrome type 2. In addition, other ion channels implicated in ion-channel-misfolding diseases are discussed.
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Affiliation(s)
- Jason C Young
- McGill University, Department of Biochemistry, Groupe de Recherche Axé sur la Structure des Protéines, 3649 Promenade Sir William Osler, Montreal, QC H3G 0B1, Canada
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32
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Zhang KP, Yang BF, Li BX. Translational toxicology and rescue strategies of the hERG channel dysfunction: biochemical and molecular mechanistic aspects. Acta Pharmacol Sin 2014; 35:1473-84. [PMID: 25418379 PMCID: PMC4261120 DOI: 10.1038/aps.2014.101] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 08/20/2014] [Indexed: 01/08/2023] Open
Abstract
The human ether-à-go-go related gene (hERG) potassium channel is an obligatory anti-target for drug development on account of its essential role in cardiac repolarization and its close association with arrhythmia. Diverse drugs have been removed from the market owing to their inhibitory activity on the hERG channel and their contribution to acquired long QT syndrome (LQTS). Moreover, mutations that cause hERG channel dysfunction may induce congenital LQTS. Recently, an increasing number of biochemical and molecular mechanisms underlying hERG-associated LQTS have been reported. In fact, numerous potential biochemical and molecular rescue strategies are hidden within the biogenesis and regulating network. So far, rescue strategies of hERG channel dysfunction and LQTS mainly include activators, blockers, and molecules that interfere with specific links and other mechanisms. The aim of this review is to discuss the rescue strategies based on hERG channel toxicology from the biochemical and molecular perspectives.
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Affiliation(s)
- Kai-ping Zhang
- Department of Pharmacology, Harbin Medical University, Harbin, China
- The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China (Key Laboratory of Cardiovascular Research, Ministry of Education), China
| | - Bao-feng Yang
- Department of Pharmacology, Harbin Medical University, Harbin, China
- The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China (Key Laboratory of Cardiovascular Research, Ministry of Education), China
| | - Bao-xin Li
- Department of Pharmacology, Harbin Medical University, Harbin, China
- The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China (Key Laboratory of Cardiovascular Research, Ministry of Education), China
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33
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Klein RD, Chidawanyika T, Tims HS, Meulia T, Bouchard RA, Pett VB. Chaperone function of two small heat shock proteins from maize. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2014; 221-222:48-58. [PMID: 24656335 DOI: 10.1016/j.plantsci.2014.01.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 01/27/2014] [Accepted: 01/29/2014] [Indexed: 05/22/2023]
Abstract
Small heat shock proteins (sHsps) are molecular chaperones that protect cells from the effect of heat and other stresses. Some sHsps are also expressed at specific stages of development. In plants different classes of sHsps are expressed in the various cellular compartments. While the Class I (cytosolic) sHsps in wheat and pea have been studied extensively, there are fewer experimental data on Class II (cytosolic) sHsps, especially in maize. Here we report the expression and purification of two Class II sHsps from Zea mays ssp. mays L. (cv. Oh43). The two proteins have almost identical sequences, with the significant exception of an additional nine-amino-acid intervening sequence near the beginning of the N-terminus in one of them. Both ZmHsp17.0-CII and ZmHsp17.8-CII oligomerize to form dodecamers at temperatures below heat shock, and we were able to visualize these dodecamers with TEM. There are significant differences between the two sHsps during heat shock at 43°C: ZmHsp17.8-CII dissociates into smaller oligomers than ZmHsp17.0-CII, and ZmHsp17.8-CII is a more efficient chaperone with target protein citrate synthase. Together with the previous observation that ZmHsp17.0-CII but not ZmHsp17.8-CII is expressed during development, we propose different roles in the cell for these two sHsps.
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Affiliation(s)
- Roger D Klein
- Department of Chemistry, The College of Wooster, Wooster, OH 44691, USA.
| | | | - Hannah S Tims
- Department of Chemistry, The College of Wooster, Wooster, OH 44691, USA.
| | - Tea Meulia
- Molecular and Cellular Imaging Center, Ohio Agricultural Research and Development Center, Wooster, OH 44691, USA.
| | - Robert A Bouchard
- Horticulture and Crop Science, Ohio Agricultural Research and Development Center, Wooster, OH 44691, USA.
| | - Virginia B Pett
- Department of Chemistry, The College of Wooster, Wooster, OH 44691, USA.
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Taldone T, Kang Y, Patel HJ, Patel MR, Patel PD, Rodina A, Patel Y, Gozman A, Maharaj R, Clement CC, Lu A, Young JC, Chiosis G. Heat shock protein 70 inhibitors. 2. 2,5'-thiodipyrimidines, 5-(phenylthio)pyrimidines, 2-(pyridin-3-ylthio)pyrimidines, and 3-(phenylthio)pyridines as reversible binders to an allosteric site on heat shock protein 70. J Med Chem 2014; 57:1208-24. [PMID: 24548239 PMCID: PMC3983364 DOI: 10.1021/jm401552y] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
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The
discovery and development of heat shock protein 70 (Hsp70)
inhibitors is currently a hot topic in cancer. In the preceding paper
in this issue (10.1021/jm401551n), we have
described structure–activity relationship studies in the first
Hsp70 inhibitor class rationally designed to bind to a novel allosteric
pocket located in the N-terminal domain of the protein. These ligands
contained an acrylamide to take advantage of an active cysteine embedded
in the allosteric pocket and acted as covalent protein modifiers upon
binding. Here, we perform chemical modifications around the irreversible
inhibitor scaffold to demonstrate that covalent modification is not
a requirement for activity within this class of compounds. The study
identifies derivative 27c, which mimics the biological
effects of the irreversible inhibitors at comparable concentrations.
Collectively, the back-to-back manuscripts describe the first pharmacophores
that favorably and selectively interact with a never explored pocket
in Hsp70 and provide a novel blueprint for a cancer-oriented development
of Hsp70-directed ligands.
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Affiliation(s)
- Tony Taldone
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center , New York, New York 10021, United States
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35
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The large conductance, calcium-activated K+ (BK) channel is regulated by cysteine string protein. Sci Rep 2014; 3:2447. [PMID: 23945775 PMCID: PMC3744087 DOI: 10.1038/srep02447] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 07/26/2013] [Indexed: 11/08/2022] Open
Abstract
Large-conductance, calcium-activated-K(+) (BK) channels are widely distributed throughout the nervous system, where they regulate action potential duration and firing frequency, along with presynaptic neurotransmitter release. Our recent efforts to identify chaperones that target neuronal ion channels have revealed cysteine string protein (CSPα) as a key regulator of BK channel expression and current density. CSPα is a vesicle-associated protein and mutations in CSPα cause the hereditary neurodegenerative disorder, adult-onset autosomal dominant neuronal ceroid lipofuscinosis (ANCL). CSPα null mice show 2.5 fold higher BK channel expression compared to wild type mice, which is not seen with other neuronal channels (i.e. Cav2.2, Kv1.1 and Kv1.2). Furthermore, mutations in either CSPα's J domain or cysteine string region markedly increase BK expression and current amplitude. We conclude that CSPα acts to regulate BK channel expression, and consequently CSPα-associated changes in BK activity may contribute to the pathogenesis of neurodegenerative disorders, such as ANCL.
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36
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Wang Q, Hu W, Lei M, Wang Y, Yan B, Liu J, Zhang R, Jin Y. MiR-17-5p impairs trafficking of H-ERG K+ channel protein by targeting multiple er stress-related chaperones during chronic oxidative stress. PLoS One 2013; 8:e84984. [PMID: 24386440 PMCID: PMC3875566 DOI: 10.1371/journal.pone.0084984] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 11/29/2013] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND To investigate if microRNAs (miRNAs) play a role in regulating h-ERG trafficking in the setting of chronic oxidative stress as a common deleterious factor for many cardiac disorders. METHODS We treated neonatal rat ventricular myocytes and HEK293 cells with stable expression of h-ERG with H2O2 for 12 h and 48 h. Expression of miR-17-5p seed miRNAs was quantified by real-time RT-PCR. Protein levels of chaperones and h-ERG trafficking were measured by Western blot analysis. Luciferase reporter gene assay was used to study miRNA and target interactions. Whole-cell patch-clamp techniques were employed to record h-ERG K(+) current. RESULTS H-ERG trafficking was impaired by H2O2 after 48 h treatment, accompanied by reciprocal changes of expression between miR-17-5p seed miRNAs and several chaperones (Hsp70, Hsc70, CANX, and Golga2), with the former upregulated and the latter downregulated. We established these chaperones as targets for miR-17-5p. Application miR-17-5p inhibitor rescued H2O2-induced impairment of h-ERG trafficking. Upregulation of endogenous by H2O2 or forced miR-17-5p expression either reduced h-ERG current. Sequestration of AP1 by its decoy molecule eliminated the upregulation of miR-17-5p, and ameliorated impairment of h-ERG trafficking. CONCLUSIONS Collectively, deregulation of the miR-17-5p seed family miRNAs can cause severe impairment of h-ERG trafficking through targeting multiple ER stress-related chaperones, and activation of AP1 likely accounts for the deleterious upregulation of these miRNAs, in the setting of prolonged duration of oxidative stress. These findings revealed the role of miRNAs in h-ERG trafficking, which may contribute to the cardiac electrical disturbances associated with oxidative stress.
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Affiliation(s)
- Qi Wang
- The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning Province, P. R. China
| | - Weina Hu
- The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning Province, P. R. China
| | - Mingming Lei
- The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning Province, P. R. China
| | - Yong Wang
- The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning Province, P. R. China
| | - Bing Yan
- The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning Province, P. R. China
| | - Jun Liu
- The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning Province, P. R. China
| | - Ren Zhang
- The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning Province, P. R. China
| | - Yuanzhe Jin
- The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning Province, P. R. China
- * E-mail:
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37
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Rodina A, Patel PD, Kang Y, Patel Y, Baaklini I, Wong MJH, Taldone T, Yan P, Yang C, Maharaj R, Gozman A, Patel MR, Patel HJ, Chirico W, Erdjument-Bromage H, Talele TT, Young JC, Chiosis G. Identification of an allosteric pocket on human hsp70 reveals a mode of inhibition of this therapeutically important protein. ACTA ACUST UNITED AC 2013; 20:1469-80. [PMID: 24239008 DOI: 10.1016/j.chembiol.2013.10.008] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 09/19/2013] [Accepted: 10/10/2013] [Indexed: 12/27/2022]
Abstract
Hsp70s are important cancer chaperones that act upstream of Hsp90 and exhibit independent anti-apoptotic activities. To develop chemical tools for the study of human Hsp70, we developed a homology model that unveils a previously unknown allosteric site located in the nucleotide binding domain of Hsp70. Combining structure-based design and phenotypic testing, we discovered a previously unknown inhibitor of this site, YK5. In cancer cells, this compound is a potent and selective binder of the cytosolic but not the organellar human Hsp70s and has biological activity partly by interfering with the formation of active oncogenic Hsp70/Hsp90/client protein complexes. YK5 is a small molecule inhibitor rationally designed to interact with an allosteric pocket of Hsp70 and represents a previously unknown chemical tool to investigate cellular mechanisms associated with Hsp70.
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Affiliation(s)
- Anna Rodina
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - Pallav D Patel
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA; Department of Pharmaceutical Sciences, College of Pharmacy and Allied Health Professions, St. John's University, 8000 Utopia Parkway, Queens, NY 11439, USA
| | - Yanlong Kang
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - Yogita Patel
- Department of Biochemistry, Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC H3G 0B1, Canada
| | - Imad Baaklini
- Department of Biochemistry, Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC H3G 0B1, Canada
| | - Michael J H Wong
- Department of Biochemistry, Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC H3G 0B1, Canada
| | - Tony Taldone
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - Pengrong Yan
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - Chenghua Yang
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - Ronnie Maharaj
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - Alexander Gozman
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - Maulik R Patel
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - Hardik J Patel
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - William Chirico
- Department of Cell Biology, SUNY Downstate Medical Center, Brooklyn, NY 11203, USA
| | | | - Tanaji T Talele
- Department of Pharmaceutical Sciences, College of Pharmacy and Allied Health Professions, St. John's University, 8000 Utopia Parkway, Queens, NY 11439, USA
| | - Jason C Young
- Department of Biochemistry, Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC H3G 0B1, Canada.
| | - Gabriela Chiosis
- Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
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