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Zhang S, Zhang L, Greule A, Tailhades J, Marschall E, Prasongpholchai P, Leng DJ, Zhang J, Zhu J, Kaczmarski JA, Schittenhelm RB, Einsle O, Jackson CJ, Alberti F, Bechthold A, Zhang Y, Tosin M, Si T, Cryle MJ. P450-mediated dehydrotyrosine formation during WS9326 biosynthesis proceeds via dehydrogenation of a specific acylated dipeptide substrate. Acta Pharm Sin B 2023; 13:3561-3574. [PMID: 37655329 PMCID: PMC10465960 DOI: 10.1016/j.apsb.2023.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/16/2023] [Accepted: 03/16/2023] [Indexed: 03/31/2023] Open
Abstract
WS9326A is a peptide antibiotic containing a highly unusual N-methyl-E-2-3-dehydrotyrosine (NMet-Dht) residue that is incorporated during peptide assembly on a non-ribosomal peptide synthetase (NRPS). The cytochrome P450 encoded by sas16 (P450Sas) has been shown to be essential for the formation of the alkene moiety in NMet-Dht, but the timing and mechanism of the P450Sas-mediated α,β-dehydrogenation of Dht remained unclear. Here, we show that the substrate of P450Sas is the NRPS-associated peptidyl carrier protein (PCP)-bound dipeptide intermediate (Z)-2-pent-1'-enyl-cinnamoyl-Thr-N-Me-Tyr. We demonstrate that P450Sas-mediated incorporation of the double bond follows N-methylation of the Tyr by the N-methyl transferase domain found within the NRPS, and further that P450Sas appears to be specific for substrates containing the (Z)-2-pent-1'-enyl-cinnamoyl group. A crystal structure of P450Sas reveals differences between P450Sas and other P450s involved in the modification of NRPS-associated substrates, including the substitution of the canonical active site alcohol residue with a phenylalanine (F250), which in turn is critical to P450Sas activity and WS9326A biosynthesis. Together, our results suggest that P450Sas catalyses the direct dehydrogenation of the NRPS-bound dipeptide substrate, thus expanding the repertoire of P450 enzymes that can be used to produce biologically active peptides.
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Affiliation(s)
- Songya Zhang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Lin Zhang
- Institut für Biochemie, Albert-Ludwigs-Universität Freiburg, Freiburg 79104, Germany
| | - Anja Greule
- Department of Biochemistry and Molecular Biology, the Monash Biomedicine Discovery Institute, Monash University, Clayton 3800, VIC, Australia
| | - Julien Tailhades
- Department of Biochemistry and Molecular Biology, the Monash Biomedicine Discovery Institute, Monash University, Clayton 3800, VIC, Australia
- EMBL Australia, Monash University, Clayton 3800, VIC, Australia
- ARC Centre of Excellence for Innovations in Peptide and Protein Science, Clayton 3800, VIC, Australia
| | - Edward Marschall
- Department of Biochemistry and Molecular Biology, the Monash Biomedicine Discovery Institute, Monash University, Clayton 3800, VIC, Australia
- EMBL Australia, Monash University, Clayton 3800, VIC, Australia
- ARC Centre of Excellence for Innovations in Peptide and Protein Science, Clayton 3800, VIC, Australia
| | | | - Daniel J. Leng
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Jingfan Zhang
- School of Life Sciences, University of Warwick, Gibbet Hill Campus, Coventry CV4 7AL, UK
| | - Jing Zhu
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Joe A. Kaczmarski
- Research School of Chemistry, the Australian National University, Acton 2601, ACT, Australia
| | - Ralf B. Schittenhelm
- Department of Biochemistry and Molecular Biology, the Monash Biomedicine Discovery Institute, Monash University, Clayton 3800, VIC, Australia
- Monash Proteomics and Metabolomics Facility, Monash University, Clayton 3800, VIC, Australia
| | - Oliver Einsle
- Institut für Biochemie, Albert-Ludwigs-Universität Freiburg, Freiburg 79104, Germany
| | - Colin J. Jackson
- ARC Centre of Excellence for Innovations in Peptide and Protein Science, Clayton 3800, VIC, Australia
- Research School of Chemistry, the Australian National University, Acton 2601, ACT, Australia
| | - Fabrizio Alberti
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
- School of Life Sciences, University of Warwick, Gibbet Hill Campus, Coventry CV4 7AL, UK
| | - Andreas Bechthold
- Institute of Pharmaceutical Sciences, Albert-Ludwigs-Universität Freiburg 79104, Germany
| | - Youming Zhang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Manuela Tosin
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Tong Si
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Max J. Cryle
- Department of Biochemistry and Molecular Biology, the Monash Biomedicine Discovery Institute, Monash University, Clayton 3800, VIC, Australia
- EMBL Australia, Monash University, Clayton 3800, VIC, Australia
- ARC Centre of Excellence for Innovations in Peptide and Protein Science, Clayton 3800, VIC, Australia
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Liu L, Wang W, Chen M, Zhang Y, Mao H, Wang D, Chen Y, Li P. Characterization of three succinyl-CoA acyltransferases involved in polyketide chain assembly. Appl Microbiol Biotechnol 2023; 107:2403-2412. [PMID: 36929192 DOI: 10.1007/s00253-023-12481-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 03/02/2023] [Accepted: 03/07/2023] [Indexed: 03/18/2023]
Abstract
Polyketides are a class of natural products with astonishing structural diversities, fascinating biological activities, and a versatile of applications. In polyketides biosynthesis, acyltransferases (ATs) are the 'gatekeeping' enzymes selecting the specific CoA-activated acyl groups as building blocks and transferring them onto the phosphopantetheine arm of acyl carrier proteins (ACPs) to enable the following condensation reactions to assemble the polyketide chain. Herein, the Art2 protein from aurantinins, a group of the antibacterial polyketides, is characterized in vitro as an AT that can load a CoA-activated succinyl unit onto the first ACP domain of Art17 (ACPArt17-1). In addition, another two proteins, GbnB and EtnB, involved in the biosynthesis of gladiolin and etnangien respectively, were traced by literature mining, homologous searching, and product structure analysis and then identified as functional succinyl-CoA ATs by the ACPArt17-1 assays. Taken together, by the assay method employing ACPArt17-1 as an acyl acceptor, we identified three ATs that can introduce a succinyl unit into the polyketide assembly line, which enriches the toolbox of polyketide biosynthetic enzymes and sets a stage for incorporating a succinyl unit into polyketide backbones in synthetic biological manners. KEY POINTS: • Three acyltransferases that are able to load ACP with a succinyl unit were characterized in vitro. • ACPArt17-1 can be used as an acceptor to assay succinyl-CoA AT from different polyketides. • The succinyl unit can be incorporated into polyketides assembly process.
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Affiliation(s)
- Lilu Liu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenzhao Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Meng Chen
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuwei Zhang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Huijin Mao
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dacheng Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yihua Chen
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Pengwei Li
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
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Zhang H, Zhang S, Zhang J, Qi H, Wang H, Zhang L, Huang J, Wang J. Acyltransferase Domain Swapping for the Production of Tenvermectin B Metabolites in Genetically Engineered Strain Streptomyces avermitilis HU02. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:11994-12003. [PMID: 36121904 DOI: 10.1021/acs.jafc.2c04482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Tenvermectins A and B (TVMs A and B) are hybrid natural compounds of avermectins and milbemycins with enhanced insecticidal activity. Aiming at obtaining a strain for the production of the higher activity metabolite-TVM-B as a major constituent, a recombinant strain Streptomyces avermitilis HU02 was constructed by a domain swapping strategy in which milA1-AT0 gene in S. avermitilis MHJ1011 was replaced by eryA1-AT0 gene from Saccharopolyspora erythraea ATCC 40137. Chemical investigation on the culture of S. avermitilis HU02 led to the isolation of a large amount of TVM-B and trace amounts of five new TVM-B analogues. The structures of new metabolites were elucidated by extensive spectroscopic analysis including 1D and 2D nuclear magnetic resonance and high-resolution electrospray ionization mass spectrometry data. The bioassay test indicated that five new TVM-B analogues exhibited potent insecticidal activity against Tetranychus cinnabarinus and Bursaphelenchus xylophilus. This study provided a feasible route to the low-cost production of TVM-B and enriched the structural diversity of TVM-B metabolites.
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Affiliation(s)
- Hui Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
- Institute of Natural Active Substances Research and Utilization, School of Agriculture and Bioengineering, Taizhou Vocational College of Science and Technology, Taizhou 318020, China
- Life Science and Biotechnology Research Center, School of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Shaoyong Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
| | - Ji Zhang
- Life Science and Biotechnology Research Center, School of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Huan Qi
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
| | - Han Wang
- Life Science and Biotechnology Research Center, School of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Liqin Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
| | - Jun Huang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
- Zhejiang Makohs Biotech Co., Ltd, Taizhou 318000, P.R. China
| | - Jidong Wang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
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Tan H, Yang X, Dai Q, Deng Z, Qu X. Unravelling the Biosynthetic Flexibility of UK-2A Enables Enzymatic Synthesis of Its Structural Variants. ACS Synth Biol 2019; 8:2659-2665. [PMID: 31747253 DOI: 10.1021/acssynbio.9b00387] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Emerging antimicrobial resistant fungal pathogens are a growing threat, and fungicides with novel modes of action are urgently needed to prevent critical failures in global food security. Fenpicoxamid, the prodrug of UK-2A, is a member of a new class of antifungal agents that displays no cross-resistance to other fungicides. Rational engineering of its structure using a biosynthetic approach is a promising avenue for developing more potent fungicides. Herein, through in vitro enzymatic reconstitution, we elucidate the biosynthetic pathway of UK-2A. Its biosynthesis involves a flexible AMP-binding protein and dilactone formation assembly enzymes that are able to select and incorporate highly diverse substituted salicylic acids into the dilactone scaffold. By introducing diverse salicylic acids into the in vitro biosynthetic pathway, we successfully generate 14 novel deacyl UK-2A analogues. This study reveals the flexibility of the biosynthetic pathway of UK-2A and provides an effective solution to rationally engineer its crucial C3 moiety.
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Affiliation(s)
- Hongqun Tan
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Xuejun Yang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Qi Dai
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Zixin Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Xudong Qu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- State Key Laboratory of Microbial Metabolism and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
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