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Minas HA, François RMM, Hemmerling F, Fraley AE, Dieterich CL, Rüdisser SH, Meoded RA, Collin S, Weissman KJ, Gruez A, Piel J. Modular Oxime Formation by a trans-AT Polyketide Synthase. Angew Chem Int Ed Engl 2023; 62:e202304481. [PMID: 37216334 DOI: 10.1002/anie.202304481] [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: 03/29/2023] [Revised: 05/16/2023] [Accepted: 05/22/2023] [Indexed: 05/24/2023]
Abstract
Modular trans-acyltransferase polyketide synthases (trans-AT PKSs) are enzymatic assembly lines that biosynthesize complex polyketide natural products. Relative to their better studied cis-AT counterparts, the trans-AT PKSs introduce remarkable chemical diversity into their polyketide products. A notable example is the lobatamide A PKS, which incorporates a methylated oxime. Here we demonstrate biochemically that this functionality is installed on-line by an unusual oxygenase-containing bimodule. Furthermore, analysis of the oxygenase crystal structure coupled with site-directed mutagenesis allows us to propose a model for catalysis, as well as identifying key protein-protein interactions that support this chemistry. Overall, our work adds oxime-forming machinery to the biomolecular toolbox available for trans-AT PKS engineering, opening the way to introducing such masked aldehyde functionalities into diverse polyketides.
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Affiliation(s)
- Hannah A Minas
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Romain M M François
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
- Université de Lorraine, CNRS, IMoPA, 54000, Nancy, France
| | - Franziska Hemmerling
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Amy E Fraley
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Cora L Dieterich
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Simon H Rüdisser
- Institute of Molecular Biology and Biophysics, Biomolecular NMR Spectroscopy Platform, Eidgenössische Technische Hochschule (ETH) Zürich, Hönggerbergring 64, 8093, Zürich, Switzerland
| | - Roy A Meoded
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Sabrina Collin
- Université de Lorraine, CNRS, IMoPA, 54000, Nancy, France
| | | | - Arnaud Gruez
- Université de Lorraine, CNRS, IMoPA, 54000, Nancy, France
| | - Jörn Piel
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
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2
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Gao Y, Birkelbach J, Fu C, Herrmann J, Irschik H, Morgenstern B, Hirschfelder K, Li R, Zhang Y, Jansen R, Müller R. The Disorazole Z Family of Highly Potent Anticancer Natural Products from Sorangium cellulosum: Structure, Bioactivity, Biosynthesis, and Heterologous Expression. Microbiol Spectr 2023; 11:e0073023. [PMID: 37318329 PMCID: PMC10434194 DOI: 10.1128/spectrum.00730-23] [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: 02/16/2023] [Accepted: 03/24/2023] [Indexed: 06/16/2023] Open
Abstract
Myxobacteria serve as a treasure trove of secondary metabolites. During our ongoing search for bioactive natural products, a novel subclass of disorazoles termed disorazole Z was discovered. Ten disorazole Z family members were purified from a large-scale fermentation of the myxobacterium Sorangium cellulosum So ce1875 and characterized by electrospray ionization-high-resolution mass spectrometry (ESI-HRMS), X-ray, nuclear magnetic resonance (NMR), and Mosher ester analysis. Disorazole Z compounds are characterized by the lack of one polyketide extension cycle, resulting in a shortened monomer in comparison to disorazole A, which finally forms a dimer in the bis-lactone core structure. In addition, an unprecedented modification of a geminal dimethyl group takes place to form a carboxylic acid methyl ester. The main component disorazole Z1 shows comparable activity in effectively killing cancer cells to disorazole A1 via binding to tubulin, which we show induces microtubule depolymerization, endoplasmic reticulum delocalization, and eventually apoptosis. The disorazole Z biosynthetic gene cluster (BGC) was identified and characterized from the alternative producer S. cellulosum So ce427 and compared to the known disorazole A BGC, followed by heterologous expression in the host Myxococcus xanthus DK1622. Pathway engineering by promoter substitution and gene deletion paves the way for detailed biosynthesis studies and efficient heterologous production of disorazole Z congeners. IMPORTANCE Microbial secondary metabolites are a prolific reservoir for the discovery of bioactive compounds, which prove to be privileged scaffolds for the development of new drugs such as antibacterial and small-molecule anticancer drugs. Consequently, the continuous discovery of novel bioactive natural products is of great importance for pharmaceutical research. Myxobacteria, especially Sorangium spp., which are known for their large genomes with yet-underexploited biosynthetic potential, are proficient producers of such secondary metabolites. From the fermentation broth of Sorangium cellulosum strain So ce1875, we isolated and characterized a family of natural products named disorazole Z, which showed potent anticancer activity. Further, we report on the biosynthesis and heterologous production of disorazole Z. These results can be stepping stones toward pharmaceutical development of the disorazole family of anticancer natural products for (pre)clinical studies.
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Affiliation(s)
- Yunsheng Gao
- Department of Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmacy at Saarland University, Saarbrücken, Germany
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
- Helmholtz International Lab for Anti-Infectives, Helmholtz Center for Infection Research, Braunschweig, Germany
| | - Joy Birkelbach
- Department of Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmacy at Saarland University, Saarbrücken, Germany
| | - Chengzhang Fu
- Department of Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmacy at Saarland University, Saarbrücken, Germany
- Helmholtz International Lab for Anti-Infectives, Helmholtz Center for Infection Research, Braunschweig, Germany
| | - Jennifer Herrmann
- Department of Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmacy at Saarland University, Saarbrücken, Germany
| | - Herbert Irschik
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Bernd Morgenstern
- Department of Inorganic Chemistry, Saarland University, Saarbrücken, Germany
| | - Kerstin Hirschfelder
- Department of Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmacy at Saarland University, Saarbrücken, Germany
| | - Ruijuan Li
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Youming Zhang
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Rolf Jansen
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Rolf Müller
- Department of Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmacy at Saarland University, Saarbrücken, Germany
- Helmholtz International Lab for Anti-Infectives, Helmholtz Center for Infection Research, Braunschweig, Germany
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3
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Adaikpoh BI, Romanowski SB, Eustáquio AS. Understanding Autologous Spliceostatin Transcriptional Regulation to Derive Parts for Heterologous Expression in a Burkholderia Bacterial Host. ACS Synth Biol 2023; 12:1952-1960. [PMID: 37338297 PMCID: PMC10527236 DOI: 10.1021/acssynbio.3c00228] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Burkholderia β-Proteobacteria are emerging sources of natural products. We are interested in developing Burkholderia sp. FERM BP-3421 into a synthetic biology chassis to facilitate natural product discovery. FERM BP-3421 produces autologous spliceostatins on gram per liter scale. We reasoned that transcription factors and promoters that regulate spliceostatin biosynthesis would provide valuable parts for heterologous expression. Herein we demonstrate that fr9A encodes a pathway-specific transcriptional activator of spliceostatin biosynthesis. In-frame deletion of fr9A abolished spliceostatin production, which was restored by genetic complementation. Using transcriptomics and green fluorescent protein (GFP) reporter assays, we identified four fr9 promoters, three of which are activated by LuxR-type regulator Fr9A. We then constructed an Fr9A-regulated promoter system that was compared to benchmarks and effectively applied for GFP and capistruin lasso peptide expression in an optimized host background. Our findings enrich the genetic toolbox for optimizing heterologous expression and promoting the discovery and development of natural products from Burkholderia bacteria.
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Affiliation(s)
- Barbara I. Adaikpoh
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois, 60607, United States
- Center for Biomolecular Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Sean B. Romanowski
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois, 60607, United States
- Center for Biomolecular Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Alessandra S. Eustáquio
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois, 60607, United States
- Center for Biomolecular Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60607, United States
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4
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Hirabayashi S, Tsuyuguchi Y, Li Y, Ohta N, Yoshikawa Y, Lin B, Fumimoto M, Nunomura K, Suzuki T, Haruta J, Nimura K, Arisawa M. Design and synthesis of 4-acetoxypentanamide derivatives of spliceostatin A and their biological evaluation towards prostate cancer treatment. Bioorg Med Chem Lett 2023; 91:129333. [PMID: 37207846 DOI: 10.1016/j.bmcl.2023.129333] [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: 04/18/2023] [Revised: 05/13/2023] [Accepted: 05/13/2023] [Indexed: 05/21/2023]
Abstract
We designed and synthesized novel 4-acetoxypentanamide derivatives of spliceostatin A, whose 4-acetoxypentenamide moiety is reduced (7), isomerized (8), or substituted with methyl at the α-position (9). The results of biological evaluation against AR-V7 and the docking analysis of each derivative suggest that the geometry of the 4-acetoxypentenamide moiety of spliceostatin A is important for its biological activity.
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Affiliation(s)
- Satoru Hirabayashi
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Yuko Tsuyuguchi
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Yue Li
- Division of Gene Therapy Science, Department of Genome Biology, Graduate School of Medicine, Osaka University, Yamada-oka 2-2, Suita, Osaka 565-0871, Japan
| | - Noriko Ohta
- Division of Gene Therapy Science, Department of Genome Biology, Graduate School of Medicine, Osaka University, Yamada-oka 2-2, Suita, Osaka 565-0871, Japan
| | - Yusuke Yoshikawa
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Bangzhong Lin
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Megumi Fumimoto
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Kazuto Nunomura
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Takeyuki Suzuki
- Comprehensive Analysis Center, Sanken, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Junichi Haruta
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Keisuke Nimura
- Division of Gene Therapy Science, Department of Genome Biology, Graduate School of Medicine, Osaka University, Yamada-oka 2-2, Suita, Osaka 565-0871, Japan; Gunma University Initiative for Advanced Research, Gunma University, Showa-machi 3-39-22, Maebashi, Gunma 371-8511, Japan
| | - Mitsuhiro Arisawa
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan.
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5
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Fraley AE, Dieterich CL, Mabesoone MFJ, Minas HA, Meoded RA, Hemmerling F, Piel J. Structure of a Promiscuous Thioesterase Domain Responsible for Branching Acylation in Polyketide Biosynthesis. Angew Chem Int Ed Engl 2022; 61:e202206385. [DOI: 10.1002/anie.202206385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Amy E. Fraley
- Department of Biology, Institute of Microbiology Eidgenössische Technische Hochschule (ETH) Zurich Vladimir-Prelog-Weg 4 8093 Zurich Switzerland
| | - Cora L. Dieterich
- Department of Biology, Institute of Microbiology Eidgenössische Technische Hochschule (ETH) Zurich Vladimir-Prelog-Weg 4 8093 Zurich Switzerland
| | - Mathijs F. J. Mabesoone
- Department of Biology, Institute of Microbiology Eidgenössische Technische Hochschule (ETH) Zurich Vladimir-Prelog-Weg 4 8093 Zurich Switzerland
| | - Hannah A. Minas
- Department of Biology, Institute of Microbiology Eidgenössische Technische Hochschule (ETH) Zurich Vladimir-Prelog-Weg 4 8093 Zurich Switzerland
| | - Roy A Meoded
- Department of Biology, Institute of Microbiology Eidgenössische Technische Hochschule (ETH) Zurich Vladimir-Prelog-Weg 4 8093 Zurich Switzerland
| | - Franziska Hemmerling
- Department of Biology, Institute of Microbiology Eidgenössische Technische Hochschule (ETH) Zurich Vladimir-Prelog-Weg 4 8093 Zurich Switzerland
| | - Jörn Piel
- Department of Biology, Institute of Microbiology Eidgenössische Technische Hochschule (ETH) Zurich Vladimir-Prelog-Weg 4 8093 Zurich Switzerland
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6
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Fraley AE, Dieterich C, Mabesoone M, Minas HA, Meoded RA, Hemmerling F, Piel J. Structure of a promiscuous thioesterase domain responsible for branching acylation in polyketide biosynthesis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Amy E. Fraley
- Eidgenossische Technische Hochschule Zurich Institute of Microbiology SWITZERLAND
| | - Cora Dieterich
- Eidgenossische Technische Hochschule Zurich Institute of Microbiology SWITZERLAND
| | - Mathijs Mabesoone
- Eidgenossische Technische Hochschule Zurich Institute of Microbiology SWITZERLAND
| | - Hannah A. Minas
- Eidgenossische Technische Hochschule Zurich Institute of Microbiology SWITZERLAND
| | - Roy A. Meoded
- Eidgenossische Technische Hochschule Zurich Institute of Microbiology SWITZERLAND
| | - Franziska Hemmerling
- Eidgenossische Technische Hochschule Zurich Institute of Microbiology SWITZERLAND
| | - Jörn Piel
- ETH Zürich Department of Biology Vladimir-Prelog-Weg 4 8093 Zürich SWITZERLAND
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7
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Hemmerling F, Meoded RA, Fraley AE, Minas HA, Dieterich CL, Rust M, Ueoka R, Jensen K, Helfrich EJN, Bergande C, Biedermann M, Magnus N, Piechulla B, Piel J. Modular Halogenation, α-Hydroxylation, and Acylation by a Remarkably Versatile Polyketide Synthase. Angew Chem Int Ed Engl 2022; 61:e202116614. [PMID: 35020279 DOI: 10.1002/anie.202116614] [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: 12/06/2021] [Indexed: 12/14/2022]
Abstract
Bacterial multimodular polyketide synthases (PKSs) are large enzymatic assembly lines that synthesize many bioactive natural products of therapeutic relevance. While PKS catalysis is mostly based on fatty acid biosynthetic principles, polyketides can be further diversified by post-PKS enzymes. Here, we characterized a remarkably versatile trans-acyltransferase (trans-AT) PKS from Serratia that builds structurally complex macrolides via more than ten functionally distinct PKS modules. In the oocydin PKS, we identified a new oxygenation module that α-hydroxylates polyketide intermediates, a halogenating module catalyzing backbone γ-chlorination, and modular O-acetylation by a thioesterase-like domain. These results from a single biosynthetic assembly line highlight the expansive biochemical repertoire of trans-AT PKSs and provide diverse modular tools for engineered biosynthesis from a close relative of E. coli.
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Affiliation(s)
- Franziska Hemmerling
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
| | - Roy A Meoded
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
| | - Amy E Fraley
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
| | - Hannah A Minas
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
| | - Cora L Dieterich
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
| | - Michael Rust
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
| | - Reiko Ueoka
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland.,School of Marine Bioscience, Kitasato University, 1-15-1, Kitazato, Minami-ku, Sagamirhara-shi Kanagawa, 252-0373, Japan
| | - Katja Jensen
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
| | - Eric J N Helfrich
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland.,Institute of Molecular Bio Science, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438, Frankfurt am Main, Germany.,LOEWE Center for Translational Biodiversity Genomics (TBG), Senckenberganlage 25, 60325, Frankfurt am Main, Germany
| | - Cedric Bergande
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
| | - Maurice Biedermann
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
| | - Nancy Magnus
- Institute for Biological Sciences, University of Rostock, Albert-Einstein-Straße 3, 18059, Rostock, Germany
| | - Birgit Piechulla
- Institute for Biological Sciences, University of Rostock, Albert-Einstein-Straße 3, 18059, Rostock, Germany
| | - Jörn Piel
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland
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8
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Modular Halogenation, α‐Hydroxylation, and Acylation by a Remarkably Versatile Polyketide Synthase. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202116614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Little R, Trottmann F, Preissler M, Hertweck C. An intramodular thioesterase domain catalyses chain release in the biosynthesis of a cytotoxic virulence factor. RSC Chem Biol 2022; 3:1121-1128. [PMID: 36128506 PMCID: PMC9428774 DOI: 10.1039/d2cb00121g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 07/15/2022] [Indexed: 11/21/2022] Open
Abstract
The bimodular PKS-NRPS BurA has two unusual non-C-terminal thioesterase domains. We show that the intramodular TE-B is responsible for the hydrolytic release of gonyol, an intermediate for the biosynthesis of the virulence factor malleicyprol.
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Affiliation(s)
- Rory Little
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology HKI. Beutenbergstr. 11a, 07745 Jena, Germany
| | - Felix Trottmann
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology HKI. Beutenbergstr. 11a, 07745 Jena, Germany
| | - Miriam Preissler
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology HKI. Beutenbergstr. 11a, 07745 Jena, Germany
| | - Christian Hertweck
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology HKI. Beutenbergstr. 11a, 07745 Jena, Germany
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10
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Little RF, Hertweck C. Chain release mechanisms in polyketide and non-ribosomal peptide biosynthesis. Nat Prod Rep 2021; 39:163-205. [PMID: 34622896 DOI: 10.1039/d1np00035g] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Review covering up to mid-2021The structure of polyketide and non-ribosomal peptide natural products is strongly influenced by how they are released from their biosynthetic enzymes. As such, Nature has evolved a diverse range of release mechanisms, leading to the formation of bioactive chemical scaffolds such as lactones, lactams, diketopiperazines, and tetronates. Here, we review the enzymes and mechanisms used for chain release in polyketide and non-ribosomal peptide biosynthesis, how these mechanisms affect natural product structure, and how they could be utilised to introduce structural diversity into the products of engineered biosynthetic pathways.
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Affiliation(s)
- Rory F Little
- Leibniz Institute for Natural Product Research and Infection Biology, HKI, Germany.
| | - Christian Hertweck
- Leibniz Institute for Natural Product Research and Infection Biology, HKI, Germany.
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11
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Yin Z, Dickschat JS. Cis double bond formation in polyketide biosynthesis. Nat Prod Rep 2021; 38:1445-1468. [PMID: 33475122 DOI: 10.1039/d0np00091d] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Covering: up to 2020Polyketides form a large group of bioactive secondary metabolites that usually contain one or more double bonds. Although most of the double bonds found in polyketides are trans or E-configured, several cases are known in which cis or Z-configurations are observed. Double bond formation by polyketide synthases (PKSs) is widely recognised to be catalysed by ketoreduction and subsequent dehydration of the acyl carrier protein (ACP)-tethered 3-ketoacyl intermediate in the PKS biosynthetic assembly line with a specific stereochemical course in which the ketoreduction step determines the usual trans or more rare cis double bond configuration. Occasionally, other mechanisms for the installation of cis double bonds such as double bond formation during chain release or post-PKS modifications including, amongst others, isomerisations or double bond installations by oxidation are observed. This review discusses the peculiar mechanisms of cis double bond formation in polyketide biosynthesis.
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Affiliation(s)
- Zhiyong Yin
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany.
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12
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Hermes C, Richarz R, Wirtz DA, Patt J, Hanke W, Kehraus S, Voß JH, Küppers J, Ohbayashi T, Namasivayam V, Alenfelder J, Inoue A, Mergaert P, Gütschow M, Müller CE, Kostenis E, König GM, Crüsemann M. Thioesterase-mediated side chain transesterification generates potent Gq signaling inhibitor FR900359. Nat Commun 2021; 12:144. [PMID: 33420046 PMCID: PMC7794379 DOI: 10.1038/s41467-020-20418-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 12/01/2020] [Indexed: 12/18/2022] Open
Abstract
The potent and selective Gq protein inhibitor depsipeptide FR900359 (FR), originally discovered as the product of an uncultivable plant endosymbiont, is synthesized by a complex biosynthetic system comprising two nonribosomal peptide synthetase (NRPS) assembly lines. Here we characterize a cultivable bacterial FR producer, enabling detailed investigations into biosynthesis and attachment of the functionally important FR side chain. We reconstitute side chain assembly by the monomodular NRPS FrsA and the non-heme monooxygenase FrsH, and characterize intermolecular side chain transesterification to the final macrocyclic intermediate FR-Core, mediated by the FrsA thioesterase domain. We harness FrsA substrate promiscuity to generate FR analogs with altered side chains and demonstrate indispensability of the FR side chain for efficient Gq inhibition by comparative bioactivity, toxicity and docking studies. Finally, evolution of FR and side chain biosynthesis is discussed based on bioinformatics analyses. Side chain transesterification boosts potency and target affinity of selective Gq inhibitor natural products. FR900359 (FR) is a Gq protein inhibitor depsipeptide isolated from an uncultivable plant endosymbiont and synthesized by non-ribosomal peptide synthetases. Here, the authors discover a cultivable bacterial FR producer and show that FrsA thioesterase domain catalyses intermolecular transesterification of the FR side chain to the depsipeptide core during biosynthesis, improving Gq inhibition properties.
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Affiliation(s)
- Cornelia Hermes
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
| | - René Richarz
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
| | - Daniel A Wirtz
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
| | - Julian Patt
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
| | - Wiebke Hanke
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
| | - Stefan Kehraus
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
| | - Jan Hendrik Voß
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Jim Küppers
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Tsubasa Ohbayashi
- University of Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Avenue de la Terrasse, Gif-sur-Yvette, 91198, France.,Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, 305-8604, Japan
| | - Vigneshwaran Namasivayam
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Judith Alenfelder
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
| | - Asuka Inoue
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, 980-8578, Japan
| | - Peter Mergaert
- University of Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Avenue de la Terrasse, Gif-sur-Yvette, 91198, France
| | - Michael Gütschow
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Christa E Müller
- Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Evi Kostenis
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
| | - Gabriele M König
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
| | - Max Crüsemann
- Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany.
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13
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Motoyama T. Secondary Metabolites of the Rice Blast Fungus Pyricularia oryzae: Biosynthesis and Biological Function. Int J Mol Sci 2020; 21:E8698. [PMID: 33218033 PMCID: PMC7698770 DOI: 10.3390/ijms21228698] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/10/2020] [Accepted: 11/17/2020] [Indexed: 02/07/2023] Open
Abstract
Plant pathogenic fungi produce a wide variety of secondary metabolites with unique and complex structures. However, most fungal secondary metabolism genes are poorly expressed under laboratory conditions. Moreover, the relationship between pathogenicity and secondary metabolites remains unclear. To activate silent gene clusters in fungi, successful approaches such as epigenetic control, promoter exchange, and heterologous expression have been reported. Pyricularia oryzae, a well-characterized plant pathogenic fungus, is the causal pathogen of rice blast disease. P. oryzae is also rich in secondary metabolism genes. However, biosynthetic genes for only four groups of secondary metabolites have been well characterized in this fungus. Biosynthetic genes for two of the four groups of secondary metabolites have been identified by activating secondary metabolism. This review focuses on the biosynthesis and roles of the four groups of secondary metabolites produced by P. oryzae. These secondary metabolites include melanin, a polyketide compound required for rice infection; pyriculols, phytotoxic polyketide compounds; nectriapyrones, antibacterial polyketide compounds produced mainly by symbiotic fungi including endophytes and plant pathogens; and tenuazonic acid, a well-known mycotoxin produced by various plant pathogenic fungi and biosynthesized by a unique NRPS-PKS enzyme.
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Affiliation(s)
- Takayuki Motoyama
- Chemical Biology Research Group, RIKEN CSRS, Wako, Saitama 351-0198, Japan
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14
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Yun CS, Nishimoto K, Motoyama T, Shimizu T, Hino T, Dohmae N, Nagano S, Osada H. Unique features of the ketosynthase domain in a nonribosomal peptide synthetase-polyketide synthase hybrid enzyme, tenuazonic acid synthetase 1. J Biol Chem 2020; 295:11602-11612. [PMID: 32565425 DOI: 10.1074/jbc.ra120.013105] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 06/18/2020] [Indexed: 11/06/2022] Open
Abstract
Many microbial secondary metabolites are produced by multienzyme complexes comprising nonribosomal peptide synthetases (NRPSs) and polyketide synthases (PKSs). The ketosynthase (KS) domains of polyketide synthase normally catalyze the decarboxylative Claisen condensation of acyl and malonyl blocks to extend the polyketide chain. However, the terminal KS domain in tenuazonic acid synthetase 1 (TAS1) from the fungus Pyricularia oryzae conducts substrate cyclization. Here, we report on the unique features of the KS domain in TAS1. We observed that this domain is monomeric, not dimeric as is typical for KSs. Analysis of a 1.68-Å resolution crystal structure suggests that the substrate cyclization is triggered via proton abstraction from the active methylene moiety in the substrate by a catalytic His-322 residue. Additionally, we show that TAS1 KS promiscuously accepts aminoacyl substrates and that this promiscuity can be increased by a single amino acid substitution in the substrate-binding pocket of the enzyme. These findings provide insight into a KS domain that accepts the amino acid-containing substrate in an NRPS-PKS hybrid enzyme and provide hints to the substrate cyclization mechanism performed by the KS domain in the biosynthesis of the mycotoxin tenuazonic acid.
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Affiliation(s)
- Choong-Soo Yun
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako-shi, Saitama, Japan
| | - Kazuki Nishimoto
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Takayuki Motoyama
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako-shi, Saitama, Japan
| | - Takeshi Shimizu
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako-shi, Saitama, Japan
| | - Tomoya Hino
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Naoshi Dohmae
- Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science, Wako-shi, Saitama, Japan
| | - Shingo Nagano
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Hiroyuki Osada
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako-shi, Saitama, Japan
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15
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Bressin RK, Osman S, Pohorilets I, Basu U, Koide K. Total Synthesis of Meayamycin B. J Org Chem 2020; 85:4637-4647. [DOI: 10.1021/acs.joc.9b03370] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Robert K. Bressin
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Sami Osman
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Ivanna Pohorilets
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Upamanyu Basu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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16
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A dual transacylation mechanism for polyketide synthase chain release in enacyloxin antibiotic biosynthesis. Nat Chem 2019; 11:906-912. [PMID: 31548673 PMCID: PMC6774797 DOI: 10.1038/s41557-019-0309-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 07/12/2019] [Indexed: 01/24/2023]
Abstract
Polyketide synthases assemble diverse natural products with numerous important applications. The thioester intermediates in polyketide assembly are covalently tethered to acyl carrier protein domains of the synthase. Several mechanisms for polyketide chain release are known, contributing to natural product structural diversification. Here we report a dual transacylation mechanism for chain release from the enacyloxin polyketide synthase, which assembles an antibiotic with promising activity against Acinetobacter baumannii. A non-elongating ketosynthase domain transfers the polyketide chain from the final acyl carrier protein domain of the synthase to a separate carrier protein and a nonribosomal peptide synthetase condensation domain condenses it with (1S, 3R, 4S)-3, 4-dihydroxycyclohexane carboxylic acid. Molecular dissection of this process reveals that non-elongating ketosynthase domain-mediated transacylation circumvents the inability of the condensation domain to recognize the acyl carrier protein domain. Several 3, 4-dihydroxycyclohexane carboxylic acid analogues can be employed for chain release, suggesting a promising strategy for producing enacyloxin analogues.
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17
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Zhao H, Zhang B, Ma LF, Shi LM, Zhan ZJ. Cytotoxic Spliceostatin Analogs from Pseudomonas sp. Chem Biodivers 2019; 16:e1900266. [PMID: 31298476 DOI: 10.1002/cbdv.201900266] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 07/11/2019] [Indexed: 12/14/2022]
Abstract
Two new spliceostatin analogs, designed as spliceostatins J and K (1 and 2), were isolated and identified from the culture of Pseudomonas sp., along with two known ones, FR901464 (3) and spliceostatin E (4). Their structures were elucidated by detailed interpretation of their spectroscopic data, especially 2D-NMR and HR-ESI-MS. Spliceostatin J (1) represented the first example of spliceostatins bearing an unusual hexahydrofuro[3,4-b]furan moiety. Biological assay showed all the isolated compounds except 1 displayed potent cytotoxic activities against two cancer cell lines (MDA-MB-231 and A-549). Structure-activity-relationship studies revealed that the tetrahydropyran ring in spliceostatin analogs was necessary for their bioactive retention.
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Affiliation(s)
- Hong Zhao
- First Clinical Medicine College, Zhejiang Chinese Medical University, Hangzhou, 310006, P. R. China
| | - Bei Zhang
- First Clinical Medicine College, Zhejiang Chinese Medical University, Hangzhou, 310006, P. R. China
| | - Lie-Feng Ma
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Lin-Mei Shi
- Lishui Technology College, Lishui, 323000, P. R. China
| | - Zha-Jun Zhan
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
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18
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Abstract
Burkholderia bacteria are multifaceted organisms that are ecologically and metabolically diverse. The Burkholderia genus has gained prominence because it includes human pathogens; however, many strains are nonpathogenic and have desirable characteristics such as beneficial plant associations and degradation of pollutants. The diversity of the Burkholderia genus is reflected within the large genomes that feature multiple replicons. Burkholderia genomes encode a plethora of natural products with potential therapeutic relevance and biotechnological applications. This review highlights Burkholderia as an emerging source of natural products. An overview of the taxonomy of the Burkholderia genus, which is currently being revised, is provided. We then present a curated compilation of natural products isolated from Burkholderia sensu lato and analyze their characteristics in terms of biosynthetic class, discovery method, and bioactivity. Finally, we describe and discuss genome characteristics and highlight the biosynthesis of a select number of natural products that are encoded in unusual biosynthetic gene clusters. The availability of >1000 Burkholderia genomes in public databases provides an opportunity to realize the genetic potential of this underexplored taxon for natural product discovery.
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Affiliation(s)
- Sylvia Kunakom
- Department of Medicinal Chemistry and Pharmacognosy and Center for Biomolecular Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Alessandra S. Eustáquio
- Department of Medicinal Chemistry and Pharmacognosy and Center for Biomolecular Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60607, USA
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19
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20
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Al-Dhelaan R, Russo PS, Padden SE, Amaya A, Dong DW, You YO. Condensation-Incompetent Ketosynthase Inhibits trans-Acyltransferase Activity. ACS Chem Biol 2019; 14:304-312. [PMID: 30642162 DOI: 10.1021/acschembio.8b01043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nonelongating modules with condensation-incompetent ketosynthase (KS0) are frequently found in many trans-acyltransferase polyketide synthases ( trans-AT PKS). KS0 catalyzes translocation of carbon chain without decarboxylative condensation. Unlike typical elongating modules where malonylation of acyl carrier protein (ACP) precedes elongation, the malonylation of ACP downstream of KS0 is assumed to be prevented. In this study, the regulation mechanism(s) of ACP malonylation in a non-elongating module of difficidin biosynthase was investigated. In vitro reconstitution, protein mass spectrometry, and enzyme kinetics demonstrated that KS0 controls the pathway by inhibiting the trans-AT activity. Protein-protein interactions of the surrounding domains also contribute to the regulation. Enzyme kinetics further identified the DfnKS05 as an allosteric inhibitor of trans-AT. The principle and knowledge discovered from this study will enhance the understanding of this unusual PKS system.
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Affiliation(s)
- Reham Al-Dhelaan
- Department of Chemistry and Biochemistry , George Mason University , Fairfax , Virginia 22030 , United States
| | | | - Sean E Padden
- Department of Chemistry and Biochemistry , George Mason University , Fairfax , Virginia 22030 , United States
| | - Anthony Amaya
- Department of Chemistry and Biochemistry , George Mason University , Fairfax , Virginia 22030 , United States
| | | | - Young-Ok You
- Department of Chemistry and Biochemistry , George Mason University , Fairfax , Virginia 22030 , United States
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21
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Abstract
Strobilurins from fungi are the inspiration for the creation of the β-methoxyacrylate class of agricultural fungicides. However, molecular details of the biosynthesis of strobilurins have remained cryptic. Here we report the sequence of genomes of two fungi that produce strobilurins and show that each contains a biosynthetic gene cluster, which encodes a highly reducing polyketide synthase with very unusual C-terminal hydrolase and methyltransferase domains. Expression of stpks1 in Aspergillus oryzae leads to the production of prestrobilurin A when the fermentation is supplemented with a benzoyl coenzyme A (CoA) analogue. This enables the discovery of a previously unobserved route to benzoyl CoA. Reconstruction of the gene cluster in A. oryzae leads to the formation of prestrobilurin A, and addition of the gene str9 encoding an FAD-dependent oxygenase leads to the key oxidative rearrangement responsible for the creation of the β-methoxyacrylate toxophore. Finally, two methyltransferases are required to complete the synthesis. Strobilurins are fungal metabolites that inspired the creation of β-methoxyacrylate agricultural fungicides. Here, Nofiani et al. identify the strobilurin biosynthesis gene cluster, encoding a polyketide synthase as well as an FAD-dependent oxygenase for an oxidative rearrangement leading to β-methoxyacrylate formation.
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22
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Shah DD, You YO, Cane DE. Stereospecific Formation of E- and Z-Disubstituted Double Bonds by Dehydratase Domains from Modules 1 and 2 of the Fostriecin Polyketide Synthase. J Am Chem Soc 2017; 139:14322-14330. [PMID: 28902510 DOI: 10.1021/jacs.7b08896] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The dehydratase domain FosDH1 from module 1 of the fostriecin polyketide synthase (PKS) catalyzed the stereospecific interconversion of (3R)-3-hydroxybutyryl-FosACP1 (5) and (E)-2-butenoyl-FosACP1 (11), as established by a combination of direct LC-MS/MS and chiral GC-MS. FosDH1 did not act on either (3S)-3-hydroxybutyryl-FosACP1 (6) or (Z)-2-butenoyl-FosACP1 (12). FosKR2, the ketoreductase from module 2 of the fostriecin PKS that normally provides the natural substrate for FosDH2, was shown to catalyze the NADPH-dependent stereospecific reduction of 3-ketobutyryl-FosACP2 (23) to (3S)-3-hydroxybutyryl-FosACP2 (8). Consistent with this finding, FosDH2 catalyzed the interconversion of the corresponding triketide substrates (3R,4E)-3-hydroxy-4-hexenoyl-FosACP2 (18) and (2Z,4E)-2,4-hexadienoyl-FosACP2 (21). FosDH2 also catalyzed the stereospecific hydration of (Z)-2-butenoyl-FosACP2 (14) to (3S)-3-hydroxybutyryl-FosACP2 (8). Although incubation of FosDH2 with (3S)-3-hydroxybutyryl-FosACP2 (8) did not result in detectable accumulation of (Z)-2-butenoyl-FosACP2 (14), FosDH2 catalyzed the slow exchange of the 3-hydroxy group of 8 with [18O]-water. FosDH2 unexpectedly could also support the stereospecific interconversion of (3R)-3-hydroxybutyryl-FosACP2 (7) and (E)-2-butenoyl-FosACP2 (13).
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Affiliation(s)
- Dhara D Shah
- Department of Chemistry, Brown University , Box H, Providence, Rhode Island 02912-9108, United States
| | - Young-Ok You
- Department of Chemistry, Brown University , Box H, Providence, Rhode Island 02912-9108, United States
| | - David E Cane
- Department of Chemistry, Brown University , Box H, Providence, Rhode Island 02912-9108, United States
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23
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Chisuga T, Miyanaga A, Kudo F, Eguchi T. Structural analysis of the dual-function thioesterase SAV606 unravels the mechanism of Michael addition of glycine to an α,β-unsaturated thioester. J Biol Chem 2017; 292:10926-10937. [PMID: 28522606 PMCID: PMC5491777 DOI: 10.1074/jbc.m117.792549] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 05/11/2017] [Indexed: 01/14/2023] Open
Abstract
Thioesterases catalyze hydrolysis of acyl thioesters to release carboxylic acid or macrocyclization to produce the corresponding macrocycle in the biosynthesis of fatty acids, polyketides, or nonribosomal peptides. Recently, we reported that the thioesterase CmiS1 from Streptomyces sp. MJ635-86F5 catalyzes the Michael addition of glycine to an α,β-unsaturated fatty acyl thioester followed by thioester hydrolysis in the biosynthesis of the macrolactam antibiotic cremimycin. However, the molecular mechanisms of CmiS1-catalyzed reactions are unclear. Here, we report on the functional and structural characterization of the CmiS1 homolog SAV606 from Streptomyces avermitilis MA-4680. In vitro analysis indicated that SAV606 catalyzes the Michael addition of glycine to crotonic acid thioester and subsequent hydrolysis yielding (R)-N-carboxymethyl-3-aminobutyric acid. We also determined the crystal structures of SAV606 both in ligand-free form at 2.4 Å resolution and in complex with (R)-N-carboxymethyl-3-aminobutyric acid at 2.0 Å resolution. We found that SAV606 adopts an α/β hotdog fold and has an active site at the dimeric interface. Examining the complexed structure, we noted that the substrate-binding loop comprising Tyr-53-Asn-61 recognizes the glycine moiety of (R)-N-carboxymethyl-3-aminobutyric acid. Moreover, we found that SAV606 does not contain an acidic residue at the active site, which is distinct from canonical hotdog thioesterases. Site-directed mutagenesis experiments revealed that His-59 plays a crucial role in both the Michael addition and hydrolysis via a water molecule. These results allow us to propose the reaction mechanism of the SAV606-catalyzed Michael addition and thioester hydrolysis and provide new insight into the multiple functions of a thioesterase family enzyme.
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Affiliation(s)
- Taichi Chisuga
- From the Department of Chemistry and Materials Science and
| | - Akimasa Miyanaga
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Fumitaka Kudo
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Tadashi Eguchi
- From the Department of Chemistry and Materials Science and
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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24
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Weissman KJ. Polyketide stereocontrol: a study in chemical biology. Beilstein J Org Chem 2017; 13:348-371. [PMID: 28326145 PMCID: PMC5331325 DOI: 10.3762/bjoc.13.39] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 02/01/2017] [Indexed: 11/23/2022] Open
Abstract
The biosynthesis of reduced polyketides in bacteria by modular polyketide synthases (PKSs) proceeds with exquisite stereocontrol. As the stereochemistry is intimately linked to the strong bioactivity of these molecules, the origins of stereochemical control are of significant interest in attempts to create derivatives of these compounds by genetic engineering. In this review, we discuss the current state of knowledge regarding this key aspect of the biosynthetic pathways. Given that much of this information has been obtained using chemical biology tools, work in this area serves as a showcase for the power of this approach to provide answers to fundamental biological questions.
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Affiliation(s)
- Kira J Weissman
- UMR 7365, Ingénierie Moléculaire et Physiopathologie Articulaire (IMoPA), CNRS-Université de Lorraine, Biopôle de l’Université de Lorraine, Campus Biologie Santé, Avenue de la Forêt de Haye, BP 50184, 54505 Vandœuvre-lès-Nancy Cedex, France
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25
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Droce A, Saei W, Jørgensen SH, Wimmer R, Giese H, Wollenberg RD, Sondergaard TE, Sørensen JL. Functional Analysis of the Fusarielin Biosynthetic Gene Cluster. Molecules 2016; 21:molecules21121710. [PMID: 27983606 PMCID: PMC6274466 DOI: 10.3390/molecules21121710] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 12/05/2016] [Accepted: 12/05/2016] [Indexed: 01/22/2023] Open
Abstract
Fusarielins are polyketides with a decalin core produced by various species of Aspergillus and Fusarium. Although the responsible gene cluster has been identified, the biosynthetic pathway remains to be elucidated. In the present study, members of the gene cluster were deleted individually in a Fusarium graminearum strain overexpressing the local transcription factor. The results suggest that a trans-acting enoyl reductase (FSL5) assists the polyketide synthase FSL1 in biosynthesis of a polyketide product, which is released by hydrolysis by a trans-acting thioesterase (FSL2). Deletion of the epimerase (FSL3) resulted in accumulation of an unstable compound, which could be the released product. A novel compound, named prefusarielin, accumulated in the deletion mutant of the cytochrome P450 monooxygenase FSL4. Unlike the known fusarielins from Fusarium, this compound does not contain oxygenized decalin rings, suggesting that FSL4 is responsible for the oxygenation.
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Affiliation(s)
- Aida Droce
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9220 Aalborg Ø, Denmark.
| | - Wagma Saei
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9220 Aalborg Ø, Denmark.
| | - Simon Hartung Jørgensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9220 Aalborg Ø, Denmark.
| | - Reinhard Wimmer
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9220 Aalborg Ø, Denmark.
| | - Henriette Giese
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9220 Aalborg Ø, Denmark.
| | - Rasmus Dam Wollenberg
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9220 Aalborg Ø, Denmark.
| | - Teis Esben Sondergaard
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9220 Aalborg Ø, Denmark.
| | - Jens Laurids Sørensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9220 Aalborg Ø, Denmark.
- Department of Chemistry and Bioscience, Aalborg University, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark.
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26
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Franke J, Hertweck C. Biomimetic Thioesters as Probes for Enzymatic Assembly Lines: Synthesis, Applications, and Challenges. Cell Chem Biol 2016; 23:1179-1192. [PMID: 27693058 DOI: 10.1016/j.chembiol.2016.08.014] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 08/09/2016] [Accepted: 08/31/2016] [Indexed: 10/20/2022]
Abstract
Thioesters play essential roles in many biosynthetic pathways to fatty acids, esters, polyketides, and non-ribosomal peptides. Coenzyme A (CoA) and related phosphopantetheine thioesters are typically employed as activated acyl units for diverse C-C, C-O, and C-N coupling reactions. To study and control these enzymatic assembly lines in vitro and in vivo structurally simplified analogs such as N-acetylcysteamine (NAC) thioesters have been developed. This review gives an overview on experimental strategies enabled by synthetic NAC thioesters, such as the elucidation of complex biosynthetic pathways and enzyme mechanisms as well as precursor-directed biosynthesis and mutasynthesis. The review also summarizes synthetic protocols and protection group strategies to access these versatile synthetic tools, which are reactive and often unstable compounds. In addition, alternative phosphopantetheine thioester mimics are presented that can be used as protein tags or suicide inhibitors for protein crosslinking and off-loading probes to elucidate polyketide intermediates.
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Affiliation(s)
- Jakob Franke
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Beutenbergstraße 11a, 07745 Jena, Germany
| | - Christian Hertweck
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Beutenbergstraße 11a, 07745 Jena, Germany; Friedrich Schiller University, 07743 Jena, Germany.
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27
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Ray L, Yamanaka K, Moore BS. A Peptidyl-Transesterifying Type I Thioesterase in Salinamide Biosynthesis. Angew Chem Int Ed Engl 2016; 55:364-7. [PMID: 26553755 PMCID: PMC4715598 DOI: 10.1002/anie.201508576] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Indexed: 11/10/2022]
Abstract
Salinamide A belongs to a rare class of bicyclic depsipeptide antibiotics in which the installation of a (4-methylhexa-2,4-dienoyl)glycine handle across a hexadepsipeptide core contributes to its chemical complexity and biological properties. Herein, we report the genetic and biochemical basis for salinamide construction in the marine bacterium Streptomyces sp. CNB-091, which involves a novel intermolecular transesterification reaction catalyzed by a type I thioesterase. Heterologous expression studies revealed the central role of the nonribosomal peptide synthetase Sln9 in constructing and installing the distinctive acylglycine "basket handle" of salinamide. Biochemical characterization of the Sln9 thioesterase domain established that transesterification of the serine residue of desmethylsalinamide E with acylated glycyl thioesters yields desmethylsalinamide C.
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Affiliation(s)
- Lauren Ray
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92037 (USA) http://scrippsscholars.ucsd.edu/bsmoore
| | - Kazuya Yamanaka
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92037 (USA) http://scrippsscholars.ucsd.edu/bsmoore
- Yokohama Research Center, JNC Corporation, Yokohama 236-8605 (Japan)
| | - Bradley S Moore
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92037 (USA) http://scrippsscholars.ucsd.edu/bsmoore.
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92037 (USA).
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28
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Helfrich EJN, Piel J. Biosynthesis of polyketides by trans-AT polyketide synthases. Nat Prod Rep 2016; 33:231-316. [DOI: 10.1039/c5np00125k] [Citation(s) in RCA: 230] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review discusses the biosynthesis of natural products that are generated bytrans-AT polyketide synthases, a family of catalytically versatile enzymes that represents one of the major group of proteins involved in the production of bioactive polyketides.
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Affiliation(s)
- Eric J. N. Helfrich
- Institute of Microbiology
- Eidgenössische Technische Hochschule (ETH) Zurich
- 8093 Zurich
- Switzerland
| | - Jörn Piel
- Institute of Microbiology
- Eidgenössische Technische Hochschule (ETH) Zurich
- 8093 Zurich
- Switzerland
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29
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Ray L, Yamanaka K, Moore BS. A Peptidyl-Transesterifying Type I Thioesterase in Salinamide Biosynthesis. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508576] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Structural and evolutionary relationships of "AT-less" type I polyketide synthase ketosynthases. Proc Natl Acad Sci U S A 2015; 112:12693-8. [PMID: 26420866 DOI: 10.1073/pnas.1515460112] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Acyltransferase (AT)-less type I polyketide synthases (PKSs) break the type I PKS paradigm. They lack the integrated AT domains within their modules and instead use a discrete AT that acts in trans, whereas a type I PKS module minimally contains AT, acyl carrier protein (ACP), and ketosynthase (KS) domains. Structures of canonical type I PKS KS-AT didomains reveal structured linkers that connect the two domains. AT-less type I PKS KSs have remnants of these linkers, which have been hypothesized to be AT docking domains. Natural products produced by AT-less type I PKSs are very complex because of an increased representation of unique modifying domains. AT-less type I PKS KSs possess substrate specificity and fall into phylogenetic clades that correlate with their substrates, whereas canonical type I PKS KSs are monophyletic. We have solved crystal structures of seven AT-less type I PKS KS domains that represent various sequence clusters, revealing insight into the large structural and subtle amino acid residue differences that lead to unique active site topologies and substrate specificities. One set of structures represents a larger group of KS domains from both canonical and AT-less type I PKSs that accept amino acid-containing substrates. One structure has a partial AT-domain, revealing the structural consequences of a type I PKS KS evolving into an AT-less type I PKS KS. These structures highlight the structural diversity within the AT-less type I PKS KS family, and most important, provide a unique opportunity to study the molecular evolution of substrate specificity within the type I PKSs.
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31
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Huang S, Tabudravu J, Elsayed SS, Travert J, Peace D, Tong MH, Kyeremeh K, Kelly SM, Trembleau L, Ebel R, Jaspars M, Yu Y, Deng H. Discovery of a Single Monooxygenase that Catalyzes Carbamate Formation and Ring Contraction in the Biosynthesis of the Legonmycins. Angew Chem Int Ed Engl 2015. [PMID: 26206556 DOI: 10.1002/anie.201502902] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Pyrrolizidine alkaloids (PAs) are a group of natural products with important biological activities. The discovery and characterization of the multifunctional FAD-dependent enzyme LgnC is now described. The enzyme is shown to convert indolizidine intermediates into pyrrolizidines through an unusual ring expansion/contraction mechanism, and catalyze the biosynthesis of new bacterial PAs, the so-called legonmycins. By genome-driven analysis, heterologous expression, and gene inactivation, the legonmycins were also shown to originate from non-ribosomal peptide synthetases (NRPSs). The biosynthetic origin of bacterial PAs has thus been disclosed for the first time.
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Affiliation(s)
- Sheng Huang
- Key Laboratory of Combinatory Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, 185 East Lake Road, Wuhan 430071 (P.R. China)
| | - Jioji Tabudravu
- Department of Chemistry, University of Aberdeen, Aberdeen (UK)
| | | | - Jeanne Travert
- Department of Chemistry, University of Aberdeen, Aberdeen (UK)
| | - Doe Peace
- Department of Chemistry, University of Aberdeen, Aberdeen (UK)
| | - Ming Him Tong
- Department of Chemistry, University of Aberdeen, Aberdeen (UK)
| | - Kwaku Kyeremeh
- Department of Chemistry, University of Ghana, P.O. Box LG56, Legon-Accra (Ghana)
| | - Sharon M Kelly
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ (UK)
| | | | - Rainer Ebel
- Department of Chemistry, University of Aberdeen, Aberdeen (UK)
| | - Marcel Jaspars
- Department of Chemistry, University of Aberdeen, Aberdeen (UK)
| | - Yi Yu
- Key Laboratory of Combinatory Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, 185 East Lake Road, Wuhan 430071 (P.R. China).
| | - Hai Deng
- Department of Chemistry, University of Aberdeen, Aberdeen (UK).
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32
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Huang S, Tabudravu J, Elsayed SS, Travert J, Peace D, Tong MH, Kyeremeh K, Kelly SM, Trembleau L, Ebel R, Jaspars M, Yu Y, Deng H. Discovery of a Single Monooxygenase that Catalyzes Carbamate Formation and Ring Contraction in the Biosynthesis of the Legonmycins. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502902] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Gay DC, Spear PJ, Keatinge-Clay AT. A double-hotdog with a new trick: structure and mechanism of the trans-acyltransferase polyketide synthase enoyl-isomerase. ACS Chem Biol 2014; 9:2374-81. [PMID: 25089587 PMCID: PMC4201341 DOI: 10.1021/cb500459b] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Many polyketide natural products exhibit invaluable medicinal properties, yet much remains to be understood regarding the machinery responsible for their biosynthesis. The recently discovered trans-acyltransferase polyketide synthases employ processing enzymes that catalyze modifications unique from those of the classical cis-acyltransferase polyketide synthases. The enoyl-isomerase domains of these megasynthases shift double bonds and are well-represented by an enzyme that helps forge the triene system within the antibiotic produced by the prototypical bacillaene synthase. This first crystal structure of an enoyl-isomerase, at 1.73 Å resolution, not only revealed relationships between this class of enzymes and dehydratases but also guided an investigation into the mechanism of double bond migration. The catalytic histidine, positioned differently from that of dehydratases, was demonstrated to independently shuttle a proton between the γ- and α-positions of the intermediate. This unprecedented mechanism highlights the catalytic diversity of divergent enzymes within trans-acyltransferase polyketide synthases.
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Affiliation(s)
- Darren C. Gay
- Department of Molecular
Biosciences, University of Texas at Austin, Austin, Texas 78712, United States
| | - Philip J. Spear
- Department of Molecular
Biosciences, University of Texas at Austin, Austin, Texas 78712, United States
| | - Adrian T. Keatinge-Clay
- Department of Molecular
Biosciences, University of Texas at Austin, Austin, Texas 78712, United States
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34
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Spliceostatin hemiketal biosynthesis in Burkholderia spp. is catalyzed by an iron/α-ketoglutarate-dependent dioxygenase. Proc Natl Acad Sci U S A 2014; 111:E3376-85. [PMID: 25097259 DOI: 10.1073/pnas.1408300111] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Spliceostatins are potent spliceosome inhibitors biosynthesized by a hybrid nonribosomal peptide synthetase-polyketide synthase (NRPS-PKS) system of the trans-acyl transferase (AT) type. Burkholderia sp. FERM BP-3421 produces hemiketal spliceostatins, such as FR901464, as well as analogs containing a terminal carboxylic acid. We provide genetic and biochemical evidence for hemiketal biosynthesis by oxidative decarboxylation rather than the previously hypothesized Baeyer-Villiger oxidative release postulated to be catalyzed by a flavin-dependent monooxygenase (FMO) activity internal to the last module of the PKS. Inactivation of Fe(II)/α-ketoglutarate-dependent dioxygenase gene fr9P led to loss of hemiketal congeners, whereas the mutant was still able to produce all major carboxylic acid-type compounds. FMO mutants, on the other hand, produced both hemiketal and carboxylic acid analogs containing an exocyclic methylene instead of an epoxide, indicating that the FMO is involved in epoxidation rather than Baeyer-Villiger oxidation. Moreover, recombinant Fr9P enzyme was shown to catalyze hydroxylation to form β-hydroxy acids, which upon decarboxylation led to hemiketal FR901464. Finally, a third oxygenase activity encoded in the biosynthetic gene cluster, the cytochrome P450 monooxygenase Fr9R, was assigned as a 4-hydroxylase based on gene inactivation results. Identification and deletion of the gene involved in hemiketal formation allowed us to generate a strain--the dioxygenase fr9P(-) mutant--that accumulates only the carboxylic acid-type spliceostatins, which are as potent as the hemiketal analogs, when derivatized to increase cell permeability, but are chemically more stable.
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35
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Wang YY, Ran XX, Chen WB, Liu SP, Zhang XS, Guo YY, Jiang XH, Jiang H, Li YQ. Characterization of type II thioesterases involved in natamycin biosynthesis in Streptomyces chattanoogensis L10. FEBS Lett 2014; 588:3259-64. [PMID: 25064840 DOI: 10.1016/j.febslet.2014.07.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 07/11/2014] [Accepted: 07/11/2014] [Indexed: 01/11/2023]
Abstract
The known functions of type II thioesterases (TEIIs) in type I polyketide synthases (PKSs) include selecting of starter acyl units, removal of aberrant extender acyl units, releasing of final products, and dehydration of polyketide intermediates. In this study, we characterized two TEIIs (ScnI and PKSIaTEII) from Streptomyces chattanoogensis L10. Deletion of scnI in S. chattanoogensis L10 decreased the natamycin production by about 43%. Both ScnI and PKSIaTEII could remove acyl units from the acyl carrier proteins (ACPs) involved in the natamycin biosynthesis. Our results show that the TEII could play important roles in both the initiation step and the elongation steps of a polyketide biosynthesis; the intracellular TEIIs involved in different biosynthetic pathways could complement each other.
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Affiliation(s)
- Yue-Yue Wang
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xin-Xin Ran
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Wei-Bin Chen
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Shui-Ping Liu
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xiao-Sheng Zhang
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Yuan-Yang Guo
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xin-Hang Jiang
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Hui Jiang
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China,; Key Laboratory of Microbial Biochemistry and Metabolism Engineering of Zhejiang Province, Hangzhou, Zhejiang 310058, China.
| | - Yong-Quan Li
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China,; Key Laboratory of Microbial Biochemistry and Metabolism Engineering of Zhejiang Province, Hangzhou, Zhejiang 310058, China.
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36
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Hill RA, Sutherland A. Hot off the press. Nat Prod Rep 2014. [DOI: 10.1039/c4np90015d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Kandziora N, Andexer JN, Moss SJ, Wilkinson B, Leadlay PF, Hahn F. Uncovering the origin of Z-configured double bonds in polyketides: intermediate E-double bond formation during borrelidin biosynthesis. Chem Sci 2014. [DOI: 10.1039/c4sc00883a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The dehydratase domain BorDH3 is assayed with a synthetic surrogate of the predicted tetraketide substrate and shown to be E-selective. Detailed NMR spectroscopic analysis of pre-borrelidin assigns the timing of the E-5 Z-isomerization to the very final steps of borrelidin biosynthesis.
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Affiliation(s)
- Nadine Kandziora
- Institut für Organische Chemie
- Leibniz Universität Hannover
- 30167 Hannover, Germany
| | - Jennifer N. Andexer
- Department of Biochemistry
- University of Cambridge (UK)
- Cambridge CB2 1QW, UK
- Institut für Pharmazeutische Wissenschaften
- Albert-Ludwigs-Universität Freiburg
| | - Steven J. Moss
- Isomerase Therapeutics
- Chesterford Research Park
- Cambridge CB10 1XL, UK
| | - Barrie Wilkinson
- Department of Molecular Microbiology
- John Innes Centre Norwich NR4 7UH
- UK
| | - Peter F. Leadlay
- Department of Biochemistry
- University of Cambridge (UK)
- Cambridge CB2 1QW, UK
| | - Frank Hahn
- Institut für Organische Chemie
- Leibniz Universität Hannover
- 30167 Hannover, Germany
- Department of Biochemistry
- University of Cambridge (UK)
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