1
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Taizoumbe KA, Steiner ST, Dickschat JS. Mechanistic Characterisation of Collinodiene Synthase, a Diterpene Synthase from Streptomyces collinus. Chemistry 2023; 29:e202302469. [PMID: 37579200 DOI: 10.1002/chem.202302469] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/14/2023] [Accepted: 08/14/2023] [Indexed: 08/16/2023]
Abstract
Two homologs of the diterpene synthase CotB2 from Streptomyces collinus (ScCotB2) and Streptomyces iakyrus (SiCotB2) were investigated for their products by in vitro incubations of the recombinant enzymes with geranylgeranyl pyrophosphate, followed by compound isolation and structure elucidation by NMR. ScCotB2 produced the new compound collinodiene, besides the canonical CotB2 product cyclooctat-9-en-7-ol, dolabella-3,7,18-triene and dolabella-3,7,12-triene, while SiCotB2 gave mainly cyclooctat-9-en-7-ol and only traces of dolabella-3,7,18-triene. The cyclisation mechanism towards the ScCotB2 products and their absolute configurations were investigated through isotopic labelling experiments.
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Affiliation(s)
- Kizerbo A Taizoumbe
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Simon T Steiner
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Jeroen S Dickschat
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
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2
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Chen TH, Chen CT, Lee CF, Huang RJ, Chen KL, Lu YC, Liang SY, Pham MT, Rao YK, Wu SH, Chein RJ, Lin HC. The Biosynthetic Gene Cluster of Mushroom-Derived Antrocin Encodes Two Dual-Functional Haloacid Dehalogenase-like Terpene Cyclases. Angew Chem Int Ed Engl 2023; 62:e202215566. [PMID: 36583947 DOI: 10.1002/anie.202215566] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 12/30/2022] [Accepted: 12/30/2022] [Indexed: 12/31/2022]
Abstract
(-)-Antrocin (1), produced by the medicinal mushroom Antrodia cinnamomea, is a potent antiproliferative compound. The biosynthetic gene cluster of 1 was identified, and the pathway was characterized by heterologous expression. We characterized a haloacid dehalogenase-like terpene cyclase AncC that biosynthesizes the drimane-type sesquiterpene (+)-albicanol (2) from farnesyl pyrophosphate (FPP). Biochemical characterization of AncC, including kinetic studies and mutagenesis, demonstrated the functions of two domains: a terpene cyclase (TC) and a pyrophosphatase (PPase). The TC domain first cyclizes FPP to albicanyl pyrophosphate, and the PPase domain then removes the pyrophosphate to form 2. Intriguingly, AncA (94 % sequence identity to AncC), in the same gene cluster, converts FPP into (R)-trans-γ-monocyclofarnesol instead of 2. Notably, Y283/F375 in the TC domain of AncA serve as a gatekeeper in controlling the formation of a cyclofarnesoid rather than a drimane-type scaffold.
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Affiliation(s)
- Tzu-Ho Chen
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
| | - Chien-Ting Chen
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
| | - Chi-Fang Lee
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
| | - Rou-Jie Huang
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan R.O.C.,Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan R.O.C
| | - Kuan-Lin Chen
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
| | - Yuan-Chun Lu
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
| | - Suh-Yuen Liang
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
| | - Mai-Truc Pham
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
| | - Yerra Koteswara Rao
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
| | - Shih-Hsiung Wu
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
| | - Rong-Jie Chein
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan R.O.C
| | - Hsiao-Ching Lin
- Institute of Biological Chemistry, Academia Sinica, Institute of Biochemical Sciences, National Taiwan University, Taipei, 115, Taiwan R.O.C
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3
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Gong K, Yong D, Fu J, Li A, Zhang Y, Li R. Diterpenoids from Streptomyces: Structures, Biosyntheses and Bioactivities. Chembiochem 2022; 23:e202200231. [PMID: 35585772 DOI: 10.1002/cbic.202200231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/16/2022] [Indexed: 11/09/2022]
Abstract
Bacteria, especially Streptomyces spp., have been emerging as rich sources of natural diterpenoids with diverse structures and broad bioactivities. Here, we review diterpenoids biosynthesized by Streptomyces , with an emphasis on their structures, biosyntheses, and bioactivities. Although diterpenoids from Streptomyces are relatively rare compared to those from plants and fungi, their novel skeletons, biosyntheses and bioactivities present opportunities for discovering new drugs, enzyme mechanisms, and applications in bio-catalysis and metabolic pathway engineering.
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Affiliation(s)
- Kai Gong
- Shandong University, State Key Laboratory of Microbial Technology, CHINA
| | - Daojing Yong
- Shandong University, State Key Laboratory of Microbial Technology, CHINA
| | - Jun Fu
- Shandong University, State Key Laboratory of Microbial Technology, CHINA
| | - Aiying Li
- Shandong University, State Key Laboratory of Microbial Technology, CHINA
| | - Youming Zhang
- Shandong University, State Key Laboratory of Microbial Technology, CHINA
| | - Ruijuan Li
- Shandong University, State Key Laboratory of Microbial Technology, Binhai Road 72, 266237, Qingdao, CHINA
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4
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Ma K, Zhang Y, Guo C, Yang Y, Han J, Yu B, Yin W, Liu H. Reconstitution of biosynthetic pathway for mushroom-derived cyathane diterpenes in yeast and generation of new "non-natural" analogues. Acta Pharm Sin B 2021; 11:2945-2956. [PMID: 34589407 PMCID: PMC8463280 DOI: 10.1016/j.apsb.2021.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/06/2021] [Accepted: 04/12/2021] [Indexed: 12/12/2022] Open
Abstract
Mushroom-derived cyathane-type diterpenes possess unusual chemical skeleton and diverse bioactivities. To efficiently supply bioactive cyathanes for deep studies and explore their structural diversity, de novo synthesis of cyathane diterpenes in a geranylgeranyl pyrophosphate engineered Saccharomyces cerevisiae is investigated. Aided by homologous analyses, one new unclustered FAD-dependent oxidase EriM accounting for the formation of allyl aldehyde and three new NADP(H)-dependent reductases in the biosynthesis of cyathanes are identified and elucidated. By combinatorial biosynthetic strategy, S. cerevisiae strains generating twenty-two cyathane-type diterpenes, including seven "unnatural" cyathane xylosides (12, 13, 14a, 14b, 19, 20, and 22) are established. Compounds 12-14, 19, and 20 show significant neurotrophic effects on PC12 cells in the dose of 6.3-25.0 μmol/L. These studies provide new insights into the divergent biosynthesis of mushroom-originated cyathanes and a straightforward approach to produce bioactive cyathane-type diterpenes.
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Affiliation(s)
- Ke Ma
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuting Zhang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Cui Guo
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanlong Yang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Junjie Han
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Bo Yu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Wenbing Yin
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongwei Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
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5
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Affiliation(s)
- Jeroen S. Dickschat
- Kekulé-Institut für Organische Chemie und BiochemieRheinische Friedrich-Wilhelms-Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
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6
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Abstract
This Minireview summarises recent developments in the biosynthesis of diterpenes by diterpene synthases in bacteria. It is structured by the class of enzyme involved in the first committed step towards diterpenes, starting with type I diterpene synthases, followed by type II enzymes and the more recently discovered UbiA-related diterpene synthases. A special emphasis lies on the reaction mechanisms of diterpene synthases that convert simple linear precursors through cationic cascades into structurally complex, usually polycyclic carbon skeletons with multiple stereogenic centres. A further main focus of this Minireview is a discussion of how these mechanisms can be unravelled. Downstream modifications to bioactive molecules are also covered.
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Affiliation(s)
- Jeroen S Dickschat
- Kekulé-Institute for Organic Chemistry and Biochemistry, Rheinische Friedrich-Wilhelms University of Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
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7
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Li XL, Xu YX, Li Y, Zhang R, Hu TY, Su P, Zhou M, Tang T, Zeng Y, Yang YL, Gao W. Rapid discovery and functional characterization of diterpene synthases from basidiomycete fungi by genome mining. Fungal Genet Biol 2019; 128:36-42. [DOI: 10.1016/j.fgb.2019.03.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 02/25/2019] [Accepted: 03/20/2019] [Indexed: 12/31/2022]
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8
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Rinkel J, Steiner ST, Dickschat JS. Diterpenbiosynthese in Actinomyceten: Studien an Cattleyensynthase und Phomopsensynthase. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902950] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jan Rinkel
- Kekulé-Institut für Organische Chemie und BiochemieUniversität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Simon T. Steiner
- Kekulé-Institut für Organische Chemie und BiochemieUniversität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Jeroen S. Dickschat
- Kekulé-Institut für Organische Chemie und BiochemieUniversität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
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9
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Rinkel J, Steiner ST, Dickschat JS. Diterpene Biosynthesis in Actinomycetes: Studies on Cattleyene Synthase and Phomopsene Synthase. Angew Chem Int Ed Engl 2019; 58:9230-9233. [PMID: 31034729 DOI: 10.1002/anie.201902950] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/18/2019] [Indexed: 12/20/2022]
Abstract
Three diterpene synthases from actinomycetes have been studied. The first enzyme from Streptomyces cattleya produced the novel compound cattleyene. The other two enzymes from Nocardia testacea and Nocardia rhamnosiphila were identified as phomopsene synthases. The cyclisation mechanism of cattleyene synthase and the EIMS fragmentation mechanism of its product were extensively studied by incubation experiments with isotopically labelled precursors. Oxidative transformations expanded the chemical space of these unique diterpenes.
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Affiliation(s)
- Jan Rinkel
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Simon T Steiner
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Jeroen S Dickschat
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
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Lin HC, Hewage RT, Lu YC, Chooi YH. Biosynthesis of bioactive natural products from Basidiomycota. Org Biomol Chem 2019; 17:1027-1036. [DOI: 10.1039/c8ob02774a] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The club fungi, Basidioycota, produce a wide range of bioactive compounds. Here, we describe recent studies on the biosynthetic pathways and enzymes of bioactive natural products from these fungi.
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Affiliation(s)
- Hsiao-Ching Lin
- Institute of Biological Chemistry
- Academia Sinica
- Taipei 115
- Republic of China
- Chemical Biology and Molecular Biophysics Program
| | - Ranuka T. Hewage
- Chemical Biology and Molecular Biophysics Program
- Taiwan International Graduate Program
- Academia Sinica
- Taipei 115
- Republic of China
| | - Yuan-Chun Lu
- Institute of Biological Chemistry
- Academia Sinica
- Taipei 115
- Republic of China
- Institute of Biochemical Sciences
| | - Yit-Heng Chooi
- School of Molecular Sciences
- The University of Western Australia
- Perth
- Australia
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11
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Bian G, Rinkel J, Wang Z, Lauterbach L, Hou A, Yuan Y, Deng Z, Liu T, Dickschat JS. Eine chimäre pilzliche Diterpensynthase der Klade II-D aus Colletotrichum gloeosporioides
produziert Dolasta-1(15),8-dien. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809954] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Guangkai Bian
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery; Ministry of Education and School of Pharmaceutical Sciences; Wuhan University; Wuhan 430071 China
| | - Jan Rinkel
- Kekulé-Institut für Organische Chemie und Biochemie; Rheinische Friedrich-Wilhelms-Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Zhangqian Wang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery; Ministry of Education and School of Pharmaceutical Sciences; Wuhan University; Wuhan 430071 China
| | - Lukas Lauterbach
- Kekulé-Institut für Organische Chemie und Biochemie; Rheinische Friedrich-Wilhelms-Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Anwei Hou
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery; Ministry of Education and School of Pharmaceutical Sciences; Wuhan University; Wuhan 430071 China
| | - Yujie Yuan
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery; Ministry of Education and School of Pharmaceutical Sciences; Wuhan University; Wuhan 430071 China
| | - Zixin Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery; Ministry of Education and School of Pharmaceutical Sciences; Wuhan University; Wuhan 430071 China
- Hubei Engineering Laboratory for Synthetic Microbiology; Wuhan Institute of Biotechnology; Wuhan 430075 China
| | - Tiangang Liu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery; Ministry of Education and School of Pharmaceutical Sciences; Wuhan University; Wuhan 430071 China
- Hubei Engineering Laboratory for Synthetic Microbiology; Wuhan Institute of Biotechnology; Wuhan 430075 China
| | - Jeroen S. Dickschat
- Kekulé-Institut für Organische Chemie und Biochemie; Rheinische Friedrich-Wilhelms-Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
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12
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Bian G, Rinkel J, Wang Z, Lauterbach L, Hou A, Yuan Y, Deng Z, Liu T, Dickschat JS. A Clade II-D Fungal Chimeric Diterpene Synthase from Colletotrichum gloeosporioides Produces Dolasta-1(15),8-diene. Angew Chem Int Ed Engl 2018; 57:15887-15890. [PMID: 30277637 DOI: 10.1002/anie.201809954] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Indexed: 01/28/2023]
Abstract
Based on a terpenoid overproduction platform in yeast for genome mining, a chimeric diterpene synthase from the endophytic fungus Colletotrichum gloeosporioides ES026 was characterized as the (5R,12R,14S)-dolasta-1(15),8-diene synthase. The absolute configuration was independently verified through the use of enantioselectively deuterated terpene precursors, which unequivocally established the predicted C1-III-IV cyclization mode for this first characterized clade II-D enzyme. Extensive isotopic labeling experiments and isolation of the intermediate (1R)-δ-araneosene supported the proposed cyclization mechanism.
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Affiliation(s)
- Guangkai Bian
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China
| | - Jan Rinkel
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Zhangqian Wang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China
| | - Lukas Lauterbach
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Anwei Hou
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China
| | - Yujie Yuan
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China
| | - Zixin Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China.,Hubei Engineering Laboratory for Synthetic Microbiology, Wuhan Institute of Biotechnology, Wuhan, 430075, China
| | - Tiangang Liu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China.,Hubei Engineering Laboratory for Synthetic Microbiology, Wuhan Institute of Biotechnology, Wuhan, 430075, China
| | - Jeroen S Dickschat
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
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13
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Mitsuhashi T, Abe I. Chimeric Terpene Synthases Possessing both Terpene Cyclization and Prenyltransfer Activities. Chembiochem 2018; 19:1106-1114. [PMID: 29675947 DOI: 10.1002/cbic.201800120] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Indexed: 12/12/2022]
Abstract
Prenyltransferase (PT) and terpene synthase (TPS) are key enzymes in the formation of the basic carbon skeletons of terpenoids. The PTs determine the prenyl carbon chain length, whereas TPSs generate the structural complexity of the molecular scaffolds, forming various ring structures. Normally, PTs and TPSs are separate, independent enzymes. However, in 2007, a chimeric enzyme, in which the PT was fused with the TPS, was found in a fungus. Recent studies have revealed that such chimeric TPSs are widely distributed in fungi and function in the biosyntheses of various terpene natural products, including sesterterpenes, which are a relatively rare group of terpenoids. This review summarizes the accumulated knowledge of these recently discovered, unique, chimeric TPSs.
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Affiliation(s)
- Takaaki Mitsuhashi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Ikuro Abe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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14
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Eriksson A, Kürten C, Syrén P. Protonation-Initiated Cyclization by a Class II Terpene Cyclase Assisted by Tunneling. Chembiochem 2017; 18:2301-2305. [PMID: 28980755 PMCID: PMC5725671 DOI: 10.1002/cbic.201700443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Indexed: 02/03/2023]
Abstract
Terpenes represent one of the most diversified classes of natural products with potent biological activities. The key to the myriad of polycyclic terpene skeletons with crucial functions in organisms from all kingdoms of life are terpene cyclase enzymes. These biocatalysts enable stereospecific cyclization of relatively simple, linear, prefolded polyisoprenes by highly complex, partially concerted, electrophilic cyclization cascades that remain incompletely understood. Herein, additional mechanistic light is shed on terpene biosynthesis by kinetic studies in mixed H2 O/D2 O buffers of a class II bacterial ent-copalyl diphosphate synthase. Mass spectrometry determination of the extent of deuterium incorporation in the bicyclic product, reminiscent of initial carbocation formation by protonation, resulted in a large kinetic isotope effect of up to seven. Kinetic analysis at different temperatures confirmed that the isotope effect was independent of temperature, which is consistent with hydrogen tunneling.
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Affiliation(s)
- Adam Eriksson
- School of Chemical Science and EngineeringKTH Royal Institute of Technology100 44StockholmSweden
| | - Charlotte Kürten
- Science for Life LaboratoryKTH Royal Institute of TechnologySchool of BiotechnologyDivision of Proteomics171 21StockholmSweden
| | - Per‐Olof Syrén
- School of Chemical Science and EngineeringKTH Royal Institute of Technology100 44StockholmSweden
- Science for Life LaboratoryKTH Royal Institute of TechnologySchool of BiotechnologyDivision of Proteomics171 21StockholmSweden
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15
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Affiliation(s)
- Jeroen S. Dickschat
- Kekulé-Institute of Organic Chemistry and Biochemistry; Rheinische Friedrich Wilhelms University of Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
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