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Wu CC, Stierle AA, Stierle DB, Chen H, Swyers M, Decker T, Borkowski E, Korajczyk P, Ye R, Mondava N. Activation of cryptic biosynthetic gene clusters by fungal artificial chromosomes to produce novel secondary metabolites. AIMS Microbiol 2023; 9:757-779. [PMID: 38173972 PMCID: PMC10758572 DOI: 10.3934/microbiol.2023039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 01/05/2024] Open
Abstract
In 2017, we reported the discovery of Berkeleylactone A (BPLA), a novel, potent antibiotic produced exclusively in co-culture by two extremophilic fungi, Penicillium fuscum and P. camembertii/clavigerum, which were isolated from the Berkeley Pit, an acid mine waste lake, in Butte, Montana. Neither fungus synthesized BPLA when grown in axenic culture. Recent studies suggest that secondary metabolites (SMs) are often synthesized by enzymes encoded by co-localized genes that form "biosynthetic gene clusters" (BGCs), which might remain silent (inactive) under various fermentation conditions. Fungi may also harbor cryptic BGCs that are not associated with previously characterized molecules. We turned to the tools of Fungal Artificial Chromosomes (FAC)-Next-Gen-Sequencing (NGS) to understand how co-culture activated cryptic biosynthesis of BPLA and several related berkeleylactones and to further investigate the true biosynthetic potential of these two fungi. FAC-NGS enables the capture of BGCs as individual FACs for heterologous expression in a modified strain of Aspergillus nidulans (heterologous host, FAC-AnHH). With this methodology, we created ten BGC-FACs that yielded fourteen different SMs, including strobilurin, which was previously isolated exclusively from basidiomycetes. Eleven of these compounds were not detected in the extracts of the FAC-AnHH. Of this discrete set, only the novel compound citreohybriddional had been isolated from either Penicillium sp. before and only at very low yield. We propose that through heterologous expression, FACs activated these silent BGCs, resulting in the synthesis of new natural products (NPs) with yields as high as 50%-60% of the crude organic extracts.
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Affiliation(s)
- Chengcang C. Wu
- Intact Genomics, Inc. 1100 Corporate Square Drive, Suite 257, St Louis, Missouri, 63132, USA
| | - Andrea A. Stierle
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana 59812, USA
| | - Donald B. Stierle
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana 59812, USA
| | - Hongyu Chen
- Intact Genomics, Inc. 1100 Corporate Square Drive, Suite 257, St Louis, Missouri, 63132, USA
| | - Michael Swyers
- Intact Genomics, Inc. 1100 Corporate Square Drive, Suite 257, St Louis, Missouri, 63132, USA
| | - Timothy Decker
- Intact Genomics, Inc. 1100 Corporate Square Drive, Suite 257, St Louis, Missouri, 63132, USA
| | - Emili Borkowski
- Intact Genomics, Inc. 1100 Corporate Square Drive, Suite 257, St Louis, Missouri, 63132, USA
| | - Peter Korajczyk
- Intact Genomics, Inc. 1100 Corporate Square Drive, Suite 257, St Louis, Missouri, 63132, USA
| | - Rosa Ye
- Intact Genomics, Inc. 1100 Corporate Square Drive, Suite 257, St Louis, Missouri, 63132, USA
| | - Niel Mondava
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana 59812, USA
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2
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Sangster JJ, Marshall JR, Turner NJ, Mangas-Sanchez J. New Trends and Future Opportunities in the Enzymatic Formation of C-C, C-N, and C-O bonds. Chembiochem 2021; 23:e202100464. [PMID: 34726813 PMCID: PMC9401909 DOI: 10.1002/cbic.202100464] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/29/2021] [Indexed: 01/04/2023]
Abstract
Organic chemistry provides society with fundamental products we use daily. Concerns about the impact that the chemical industry has over the environment is propelling major changes in the way we manufacture chemicals. Biocatalysis offers an alternative to other synthetic approaches as it employs enzymes, Nature's catalysts, to carry out chemical transformations. Enzymes are biodegradable, come from renewable sources, operate under mild reaction conditions, and display high selectivities in the processes they catalyse. As a highly multidisciplinary field, biocatalysis benefits from advances in different areas, and developments in the fields of molecular biology, bioinformatics, and chemical engineering have accelerated the extension of the range of available transformations (E. L. Bell et al., Nat. Rev. Meth. Prim. 2021, 1, 1-21). Recently, we surveyed advances in the expansion of the scope of biocatalysis via enzyme discovery and protein engineering (J. R. Marshall et al., Tetrahedron 2021, 82, 131926). Herein, we focus on novel enzymes currently available to the broad synthetic community for the construction of new C-C, C-N and C-O bonds, with the purpose of providing the non-specialist with new and alternative tools for chiral and sustainable chemical synthesis.
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Affiliation(s)
- Jack J Sangster
- Department of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - James R Marshall
- Department of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Nicholas J Turner
- Department of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Juan Mangas-Sanchez
- Institute of Chemical Synthesis and Homogeneous Catalysis, Spanish National Research Council (CSIC), Pedro Cerbuna 12, 50009, Zaragoza, Spain.,ARAID Foundation, Zaragoza, Spain
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3
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Fujiyama K, Kato N, Re S, Kinugasa K, Watanabe K, Takita R, Nogawa T, Hino T, Osada H, Sugita Y, Takahashi S, Nagano S. Molecular Basis for Two Stereoselective Diels–Alderases that Produce Decalin Skeletons**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Keisuke Fujiyama
- Department of Chemistry and Biotechnology Graduate School of Engineering Tottori University 4-101 Koyama-cho Minami Tottori 680-8552 Japan
- Current address: Dormancy and Adaptation Research Unit RIKEN Center for Sustainable Resource Science 1-7-22 Suehiro, Tsurumi Yokohama Kanagawa 230-0045 Japan
| | - Naoki Kato
- Natural Product Biosynthesis Research Unit RIKEN Center for Sustainable Research Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
- Faculty of Agriculture Setsunan University 45-1 Nagaotoge-cho, Hirakata Osaka 573-0101 Japan
| | - Suyong Re
- Laboratory for Biomolecular Function Simulation RIKEN Center for Biosystems Dynamics Research 2-2-3 Minatojima-minami-machi, Chuo-ku Kobe Hyogo 650-0047 Japan
- Artificial Intelligence Center for Health and Biomedical Research National Institutes of Biomedical Innovation, Health, and Nutrition 7-6-8, Saito-Asagi, Ibaraki Osaka 567-0085 Japan
| | - Kiyomi Kinugasa
- Natural Product Biosynthesis Research Unit RIKEN Center for Sustainable Research Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Kohei Watanabe
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Toshihiko Nogawa
- Chemical Biology Research Group RIKEN Center for Sustainable Research Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Tomoya Hino
- Department of Chemistry and Biotechnology Graduate School of Engineering Tottori University 4-101 Koyama-cho Minami Tottori 680-8552 Japan
- Center for Research on Green Sustainable Chemistry Tottori University 4-101 Koyama-cho Minami Tottori 680-8552 Japan
| | - Hiroyuki Osada
- Chemical Biology Research Group RIKEN Center for Sustainable Research Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Yuji Sugita
- Laboratory for Biomolecular Function Simulation RIKEN Center for Biosystems Dynamics Research 2-2-3 Minatojima-minami-machi, Chuo-ku Kobe Hyogo 650-0047 Japan
- Theoretical Molecular Science Laboratory RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako Saitama 351-0198 Japan
- Computational Biophysics Research Team RIKEN Center for Computational Science 7-1-26 Minatojima-minami-machi Chuo-ku Kobe, Hyogo 650-0047 Japan
| | - Shunji Takahashi
- Natural Product Biosynthesis Research Unit RIKEN Center for Sustainable Research Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Shingo Nagano
- Department of Chemistry and Biotechnology Graduate School of Engineering Tottori University 4-101 Koyama-cho Minami Tottori 680-8552 Japan
- Center for Research on Green Sustainable Chemistry Tottori University 4-101 Koyama-cho Minami Tottori 680-8552 Japan
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4
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Fujiyama K, Kato N, Re S, Kinugasa K, Watanabe K, Takita R, Nogawa T, Hino T, Osada H, Sugita Y, Takahashi S, Nagano S. Molecular Basis for Two Stereoselective Diels-Alderases that Produce Decalin Skeletons*. Angew Chem Int Ed Engl 2021; 60:22401-22410. [PMID: 34121297 PMCID: PMC8518865 DOI: 10.1002/anie.202106186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Indexed: 12/02/2022]
Abstract
Enzymes catalyzing [4+2] cycloaddition have attracted increasing attention because of their key roles in natural product biosynthesis. Here, we solved the X-ray crystal structures of a pair of decalin synthases, Fsa2 and Phm7, that catalyze intramolecular [4+2] cycloadditions to form enantiomeric decalin scaffolds during biosynthesis of the HIV-1 integrase inhibitor equisetin and its stereochemical opposite, phomasetin. Computational modeling, using molecular dynamics simulations as well as quantum chemical calculations, demonstrates that the reactions proceed through synergetic conformational constraints assuring transition state-like substrates folds and their stabilization by specific protein-substrate interactions. Site-directed mutagenesis experiments verified the binding models. Intriguingly, the flexibility of bound substrates is largely different in two enzymes, suggesting the distinctive mechanism of dynamics regulation behind these stereoselective reactions. The proposed reaction mechanism herein deepens the basic understanding how these enzymes work but also provides a guiding principle to create artificial enzymes.
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Affiliation(s)
- Keisuke Fujiyama
- Department of Chemistry and BiotechnologyGraduate School of EngineeringTottori University4-101 Koyama-choMinamiTottori680-8552Japan
- Current address: Dormancy and Adaptation Research UnitRIKEN Center for Sustainable Resource Science1-7-22 Suehiro, TsurumiYokohamaKanagawa230-0045Japan
| | - Naoki Kato
- Natural Product Biosynthesis Research UnitRIKEN Center for Sustainable Research Science2-1 HirosawaWakoSaitama351-0198Japan
- Faculty of AgricultureSetsunan University45-1 Nagaotoge-cho, HirakataOsaka573-0101Japan
| | - Suyong Re
- Laboratory for Biomolecular Function SimulationRIKEN Center for Biosystems Dynamics Research2-2-3 Minatojima-minami-machi, Chuo-kuKobeHyogo650-0047Japan
- Artificial Intelligence Center for Health and Biomedical ResearchNational Institutes of Biomedical Innovation, Health, and Nutrition7-6-8, Saito-Asagi, IbarakiOsaka567-0085Japan
| | - Kiyomi Kinugasa
- Natural Product Biosynthesis Research UnitRIKEN Center for Sustainable Research Science2-1 HirosawaWakoSaitama351-0198Japan
| | - Kohei Watanabe
- Graduate School of Pharmaceutical SciencesThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyo113-0033Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical SciencesThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyo113-0033Japan
| | - Toshihiko Nogawa
- Chemical Biology Research GroupRIKEN Center for Sustainable Research Science2-1 HirosawaWakoSaitama351-0198Japan
| | - Tomoya Hino
- Department of Chemistry and BiotechnologyGraduate School of EngineeringTottori University4-101 Koyama-choMinamiTottori680-8552Japan
- Center for Research on Green Sustainable ChemistryTottori University4-101 Koyama-choMinamiTottori680-8552Japan
| | - Hiroyuki Osada
- Chemical Biology Research GroupRIKEN Center for Sustainable Research Science2-1 HirosawaWakoSaitama351-0198Japan
| | - Yuji Sugita
- Laboratory for Biomolecular Function SimulationRIKEN Center for Biosystems Dynamics Research2-2-3 Minatojima-minami-machi, Chuo-kuKobeHyogo650-0047Japan
- Theoretical Molecular Science LaboratoryRIKEN Cluster for Pioneering Research2-1 HirosawaWakoSaitama351-0198Japan
- Computational Biophysics Research TeamRIKEN Center for Computational Science7-1-26 Minatojima-minami-machiChuo-kuKobe, Hyogo650-0047Japan
| | - Shunji Takahashi
- Natural Product Biosynthesis Research UnitRIKEN Center for Sustainable Research Science2-1 HirosawaWakoSaitama351-0198Japan
| | - Shingo Nagano
- Department of Chemistry and BiotechnologyGraduate School of EngineeringTottori University4-101 Koyama-choMinamiTottori680-8552Japan
- Center for Research on Green Sustainable ChemistryTottori University4-101 Koyama-choMinamiTottori680-8552Japan
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5
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Tao H, Mori T, Wei X, Matsuda Y, Abe I. One Polyketide Synthase, Two Distinct Products: Trans-Acting Enzyme-Controlled Product Divergence in Calbistrin Biosynthesis. Angew Chem Int Ed Engl 2021; 60:8851-8858. [PMID: 33480463 DOI: 10.1002/anie.202016525] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Indexed: 12/17/2022]
Abstract
Calbistrins are fungal polyketides consisting of the characteristic decalin and polyene moieties. Although the biosynthetic gene cluster of calbistrin A was recently identified, the pathway of calbistrin A biosynthesis has largely remained uninvestigated. Herein, we investigated the mechanism by which the backbone structures of calbistrins are formed, by heterologous and in vitro reconstitution of the biosynthesis and a structural biological study. Intriguingly, our analyses revealed that the decalin and polyene portions of calbistrins are synthesized by the single polyketide synthase (PKS) CalA, with the aid of the trans-acting enoylreductase CalK and the trans-acting C-methyltransferase CalH, respectively. We also determined that the esterification of the two polyketide parts is catalyzed by the acyltransferase CalD. Our study has uncovered a novel dual-functional PKS and thus broadened our understanding of how fungi synthesize diverse polyketide natural products.
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Affiliation(s)
- Hui Tao
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Takahiro Mori
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, 113-8657, Japan.,PRESTO (Japan) Science and Technology Agency, Kawaguchi, Saitama, 332-0012, Japan
| | - Xingxing Wei
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Yudai Matsuda
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Ikuro Abe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, 113-8657, Japan
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6
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Tao H, Mori T, Wei X, Matsuda Y, Abe I. One Polyketide Synthase, Two Distinct Products:
Trans
‐Acting Enzyme‐Controlled Product Divergence in Calbistrin Biosynthesis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hui Tao
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Takahiro Mori
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
- Collaborative Research Institute for Innovative Microbiology The University of Tokyo Yayoi 1-1-1, Bunkyo-ku Tokyo 113-8657 Japan
- PRESTO (Japan) Science and Technology Agency Kawaguchi Saitama 332-0012 Japan
| | - Xingxing Wei
- Department of Chemistry City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong SAR China
| | - Yudai Matsuda
- Department of Chemistry City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong SAR China
| | - Ikuro Abe
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
- Collaborative Research Institute for Innovative Microbiology The University of Tokyo Yayoi 1-1-1, Bunkyo-ku Tokyo 113-8657 Japan
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7
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Hu J, Li H, Chooi YH. Fungal Dirigent Protein Controls the Stereoselectivity of Multicopper Oxidase-Catalyzed Phenol Coupling in Viriditoxin Biosynthesis. J Am Chem Soc 2019; 141:8068-8072. [DOI: 10.1021/jacs.9b03354] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Jinyu Hu
- School of Molecular Sciences, University of Western Australia, Perth, Western Australia 6009, Australia
| | - Hang Li
- School of Molecular Sciences, University of Western Australia, Perth, Western Australia 6009, Australia
| | - Yit-Heng Chooi
- School of Molecular Sciences, University of Western Australia, Perth, Western Australia 6009, Australia
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8
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Pidot SJ, Herisse M, Sharkey L, Atkin L, Porter JL, Seemann T, Howden BP, Rizzacasa MA, Stinear TP. Biosynthesis and Ether‐Bridge Formation in Nargenicin Macrolides. Angew Chem Int Ed Engl 2019; 58:3996-4001. [DOI: 10.1002/anie.201900290] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Indexed: 01/09/2023]
Affiliation(s)
- Sacha J. Pidot
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Marion Herisse
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Liam Sharkey
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Liselle Atkin
- School of ChemistryThe Bio21 Molecular Science and Biotechnology InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Jessica L. Porter
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Torsten Seemann
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
- Microbioloigical Diagnostic UnitUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Benjamin P. Howden
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
- Microbioloigical Diagnostic UnitUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Mark A. Rizzacasa
- School of ChemistryThe Bio21 Molecular Science and Biotechnology InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Timothy P. Stinear
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
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9
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Lichman BR, O'Connor SE, Kries H. Biocatalytic Strategies towards [4+2] Cycloadditions. Chemistry 2019; 25:6864-6877. [DOI: 10.1002/chem.201805412] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 01/17/2019] [Indexed: 11/05/2022]
Affiliation(s)
- Benjamin R. Lichman
- Department of Biological Chemistry; The John Innes Centre; Colney Lane Norwich UK
- Current address: Department of Biology; University of York; York YO10 5YW UK
| | - Sarah E. O'Connor
- Department of Biological Chemistry; The John Innes Centre; Colney Lane Norwich UK
| | - Hajo Kries
- Independent Junior Research Group, Biosynthetic Design of Natural Products; Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI Jena); Beutenbergstr. 11a 07745 Jena Germany
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10
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Pidot SJ, Herisse M, Sharkey L, Atkin L, Porter JL, Seemann T, Howden BP, Rizzacasa MA, Stinear TP. Biosynthesis and Ether‐Bridge Formation in Nargenicin Macrolides. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sacha J. Pidot
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Marion Herisse
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Liam Sharkey
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Liselle Atkin
- School of ChemistryThe Bio21 Molecular Science and Biotechnology InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Jessica L. Porter
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Torsten Seemann
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
- Microbioloigical Diagnostic UnitUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Benjamin P. Howden
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
- Microbioloigical Diagnostic UnitUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Mark A. Rizzacasa
- School of ChemistryThe Bio21 Molecular Science and Biotechnology InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
| | - Timothy P. Stinear
- Department of Microbiology and Immunology at the Doherty InstituteUniversity of Melbourne Melbourne VIC 3000 Australia
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