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Bowen JI, Wang L, Crump MP, Willis CL. Synthetic and biosynthetic methods for selective cyclisations of 4,5-epoxy alcohols to tetrahydropyrans. Org Biomol Chem 2022; 20:1150-1175. [PMID: 35029626 PMCID: PMC8827043 DOI: 10.1039/d1ob01905h] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 12/21/2021] [Indexed: 12/20/2022]
Abstract
Tetrahydropyrans (THPs) are common structural motifs found in natural products and synthetic therapeutic molecules. In Nature these 6-membered oxygen heterocycles are often assembled via intramolecular reactions involving either oxy-Michael additions or ring opening of epoxy-alcohols. Indeed, the polyether natural products have been particularly widely studied due to their fascinating structures and important biological properties; these are commonly formed via endo-selective epoxide-opening cascades. In this review we outline synthetic approaches for endo-selective intramolecular epoxide ring opening (IERO) of 4,5-epoxy-alcohols and their applications in natural product synthesis. In addition, the biosynthesis of THP-containing natural products which utilise IERO reactions are reviewed.
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Affiliation(s)
- James I Bowen
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Luoyi Wang
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Matthew P Crump
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Christine L Willis
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
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2
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Regulatory Patterns of Crp on Monensin Biosynthesis in Streptomyces cinnamonensis. Microorganisms 2020; 8:microorganisms8020271. [PMID: 32079344 PMCID: PMC7074812 DOI: 10.3390/microorganisms8020271] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/12/2020] [Accepted: 02/15/2020] [Indexed: 01/03/2023] Open
Abstract
Monensin, produced by Streptomyces cinnamonensis, is a polyether ionophore antibiotic widely used as a coccidiostat and a growth-promoting agent in agricultural industry. In this study, cyclic AMP receptor protein (Crp), the global transcription factor for regulation of monensin biosynthesis, was deciphered. The overexpression and antisense RNA silencing of crp revealed that Crp plays a positive role in monensin biosynthesis. RNA sequencing analysis indicated that Crp exhibited extensive regulatory effects on genes involved in both primary metabolic pathways and the monensin biosynthetic gene cluster (mon). The primary metabolic genes, including acs, pckA, accB, acdH, atoB, mutB, epi and ccr, which are pivotal in the biosynthesis of monensin precursors malonyl-CoA, methylmalonyl-CoA and ethylmalonyl-CoA, are transcriptionally upregulated by Crp. Furthermore, Crp upregulates the expression of most mon genes, including all PKS genes (monAI to monAVIII), tailoring genes (monBI-monBII-monCI, monD and monAX) and a pathway-specific regulatory gene (monRI). Enhanced precursor supply and the upregulated expression of mon cluser by Crp would allow the higher production of monensin in S. cinnamonensis. This study gives a more comprehensive understanding of the global regulator Crp and extends the knowledge of Crp regulatory mechanism in Streptomyces.
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Grote M, Schulz F. Exploring the Promiscuous Enzymatic Activation of Unnatural Polyketide Extender Units in Vitro and in Vivo for Monensin Biosynthesis. Chembiochem 2019; 20:1183-1189. [DOI: 10.1002/cbic.201800734] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Marius Grote
- Fakultät für Chemie und BiochemieRuhr-Universität Bochum Universitätsstrassee 150 44780 Bochum Germany
| | - Frank Schulz
- Fakultät für Chemie und BiochemieRuhr-Universität Bochum Universitätsstrassee 150 44780 Bochum Germany
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Zhang Y, Lin CY, Li XM, Tang ZK, Qiao J, Zhao GR. DasR positively controls monensin production at two-level regulation in Streptomyces cinnamonensis. J Ind Microbiol Biotechnol 2016; 43:1681-1692. [PMID: 27718094 DOI: 10.1007/s10295-016-1845-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 09/26/2016] [Indexed: 01/06/2023]
Abstract
The polyether ionophore antibiotic monensin is produced by Streptomyces cinnamonensis and is used as a coccidiostat for chickens and growth-promoting agent for cattle. Monensin biosynthetic gene cluster has been cloned and partially characterized. The GntR-family transcription factor DasR regulates antibiotic production and morphological development in Streptomyces coelicolor and Saccharopolyspora erythraea. In this study, we identified and characterized the two-level regulatory cascade of DasR to monensin production in S. cinnamonensis. Forward and reverse genetics by overexpression and antisense RNA silence of dasR revealed that DasR positively controls monensin production under nutrient-rich condition. Electrophoresis mobility shift assay (EMSA) showed that DasR protein specifically binds to the promoter regions of both pathway-specific regulatory gene monRII and biosynthetic genes monAIX, monE and monT. Semi-quantitative RT-PCR further confirmed that DasR upregulates the transcriptional levels of these genes during monensin fermentation. Subsequently, co-overexpressed dasR with pathway-specific regulatory genes monRI, monRII or monH greatly improved monensin production.
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Affiliation(s)
- Yue Zhang
- Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin, 300072, China
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, University, Tianjin, 300072, China
- SynBio Research Platform, Collaborative, Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China
| | - Chun-Yan Lin
- Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin, 300072, China
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, University, Tianjin, 300072, China
- SynBio Research Platform, Collaborative, Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China
| | - Xiao-Mei Li
- Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin, 300072, China
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, University, Tianjin, 300072, China
- SynBio Research Platform, Collaborative, Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China
| | - Zheng-Kun Tang
- Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin, 300072, China
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, University, Tianjin, 300072, China
- SynBio Research Platform, Collaborative, Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China
| | - Jianjun Qiao
- Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin, 300072, China
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, University, Tianjin, 300072, China
- SynBio Research Platform, Collaborative, Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China
| | - Guang-Rong Zhao
- Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin, 300072, China.
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, University, Tianjin, 300072, China.
- SynBio Research Platform, Collaborative, Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China.
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Suzuki G, Minami A, Shimaya M, Kodama T, Morimoto Y, Oguri H, Oikawa H. Analysis of Enantiofacial Selective Epoxidation Catalyzed by Flavin-containing Monooxygenase Lsd18 Involved in Ionophore Polyether Lasalocid Biosynthesis. CHEM LETT 2014. [DOI: 10.1246/cl.140721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Gaku Suzuki
- Division of Chemistry, Graduate School of Science, Hokkaido University
| | - Atsushi Minami
- Division of Chemistry, Graduate School of Science, Hokkaido University
| | - Mayu Shimaya
- Division of Chemistry, Graduate School of Science, Hokkaido University
| | - Takeshi Kodama
- Department of Chemistry, Graduate School of Science, Osaka City University
| | - Yoshiki Morimoto
- Department of Chemistry, Graduate School of Science, Osaka City University
| | - Hiroki Oguri
- Division of Chemistry, Graduate School of Science, Hokkaido University
| | - Hideaki Oikawa
- Division of Chemistry, Graduate School of Science, Hokkaido University
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Minami A, Ose T, Sato K, Oikawa A, Kuroki K, Maenaka K, Oguri H, Oikawa H. Allosteric regulation of epoxide opening cascades by a pair of epoxide hydrolases in monensin biosynthesis. ACS Chem Biol 2014; 9:562-9. [PMID: 24320215 DOI: 10.1021/cb4006485] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Multistep catalysis of epoxide hydrolase/cyclase in the epoxide opening cascade is an intriguing issue in polyether biosynthesis. A pair of structurally homologous epoxide hydrolases was found in gene clusters of ionophore polyethers. In the epoxide opening reactions with MonBI and MonBII involved in monensin biosynthesis, we found that MonBII and catalytically inactive MonBI mutant catalyzed two-step reactions of bisepoxide substrate analogue to afford bicyclic product although MonBII alone catalyzed only the first cyclization. The X-ray crystal structure of MonBI dimers suggested the importance of the KSD motif in MonBI/MonBI interaction, which was further supported by gel filtration chromatography of wild-type MonBI and mutant MonBI. The involvement of the KSD motif in heterodimer formation was confirmed by in vitro assay. Direct evidence of MonBI/MonBII interaction was obtained by native mass spectrometry. Its dissociation constant was determined as 2.21 × 10(-5) M by surface plasmon resonance. Our results suggested the involvement of an allosteric regulation mechanism by MonBI/MonBII interaction in monensin skeletal construction.
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Affiliation(s)
- Atsushi Minami
- Division of Chemistry, Graduate School of Science and ‡Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0810, Japan
| | - Toyoyuki Ose
- Division of Chemistry, Graduate School of Science and ‡Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0810, Japan
| | - Kyohei Sato
- Division of Chemistry, Graduate School of Science and ‡Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0810, Japan
| | - Azusa Oikawa
- Division of Chemistry, Graduate School of Science and ‡Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0810, Japan
| | - Kimiko Kuroki
- Division of Chemistry, Graduate School of Science and ‡Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0810, Japan
| | - Katsumi Maenaka
- Division of Chemistry, Graduate School of Science and ‡Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0810, Japan
| | - Hiroki Oguri
- Division of Chemistry, Graduate School of Science and ‡Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0810, Japan
| | - Hideaki Oikawa
- Division of Chemistry, Graduate School of Science and ‡Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0810, Japan
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Pöplau P, Frank S, Morinaka BI, Piel J. Eine enzymatische Domäne für die Erzeugung cyclischer Ether in komplexen Polyketiden. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201307406] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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8
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Pöplau P, Frank S, Morinaka BI, Piel J. An Enzymatic Domain for the Formation of Cyclic Ethers in Complex Polyketides. Angew Chem Int Ed Engl 2013; 52:13215-8. [DOI: 10.1002/anie.201307406] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Indexed: 11/06/2022]
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Minami A, Oguri H, Watanabe K, Oikawa H. Biosynthetic machinery of ionophore polyether lasalocid: enzymatic construction of polyether skeleton. Curr Opin Chem Biol 2013; 17:555-61. [DOI: 10.1016/j.cbpa.2013.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 05/29/2013] [Accepted: 06/01/2013] [Indexed: 02/02/2023]
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Minami A, Shimaya M, Suzuki G, Migita A, Shinde SS, Sato K, Watanabe K, Tamura T, Oguri H, Oikawa H. Sequential enzymatic epoxidation involved in polyether lasalocid biosynthesis. J Am Chem Soc 2012; 134:7246-9. [PMID: 22506807 DOI: 10.1021/ja301386g] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantioselective epoxidation followed by regioselective epoxide opening reaction are the key processes in construction of the polyether skeleton. Recent genetic analysis of ionophore polyether biosynthetic gene clusters suggested that flavin-containing monooxygenases (FMOs) could be involved in the oxidation steps. In vivo and in vitro analyses of Lsd18, an FMO involved in the biosynthesis of polyether lasalocid, using simple olefin or truncated diene of a putative substrate as substrate mimics demonstrated that enantioselective epoxidation affords natural type mono- or bis-epoxide in a stepwise manner. These findings allow us to figure out enzymatic polyether construction in lasalocid biosynthesis.
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Affiliation(s)
- Atsushi Minami
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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