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Schultes FPJ, Welter L, Schmidtke M, Tischler D, Mügge C. A tailored cytochrome P450 monooxygenase from Gordonia rubripertincta CWB2 for selective aliphatic monooxygenation. Biol Chem 2024:hsz-2024-0041. [PMID: 39331465 DOI: 10.1515/hsz-2024-0041] [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: 03/07/2024] [Accepted: 09/04/2024] [Indexed: 09/28/2024]
Abstract
Cytochrome P450 monooxygenases are recognized as versatile biocatalysts due to their broad reaction capabilities. One important reaction is the hydroxylation of non-activated C-H bonds. The subfamily CYP153A is known for terminal hydroxylation reactions, giving access to functionalized aliphatics. Whilst fatty derivatives may be converted by numerous enzyme classes, midchain aliphatics are seldomly accepted, a prime property of CYP153As. We report here on a new CYP153A member from the genome of the mesophilic actinobacterium Gordonia rubripertincta CWB2 as an efficient biocatalyst. The gene was overexpressed in Escherichia coli and fused with a surrogate electron transport system from Acinetobacter sp. OC4. This chimeric self-sufficient whole-cell system could perform hydroxylation and epoxidation reactions: conversions of C6-C14 alkanes, alkenes, alcohols and of cyclic compounds were observed, yielding production rates of, e.g., 2.69 mM h-1 for 1-hexanol and 4.97 mM h-1 for 1,2-epoxyhexane. Optimizing the linker compositions between the protein units led to significantly altered activity. Balancing linker length and flexibility with glycine-rich and helix-forming linker units increased 1-hexanol production activity to 350 % compared to the initial linker setup with entirely helical linkers. The study shows that strategic coupling of efficient electron supply and a selective enzyme enables previously challenging monooxygenation reactions of midchain aliphatics.
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Affiliation(s)
- Fabian Peter Josef Schultes
- Microbial Biotechnology, Faculty of Biology and Biotechnology, 9142 Ruhr University Bochum , D-44801 Bochum, Germany
| | - Leon Welter
- Microbial Biotechnology, Faculty of Biology and Biotechnology, 9142 Ruhr University Bochum , D-44801 Bochum, Germany
| | - Myra Schmidtke
- Microbial Biotechnology, Faculty of Biology and Biotechnology, 9142 Ruhr University Bochum , D-44801 Bochum, Germany
| | - Dirk Tischler
- Microbial Biotechnology, Faculty of Biology and Biotechnology, 9142 Ruhr University Bochum , D-44801 Bochum, Germany
| | - Carolin Mügge
- Microbial Biotechnology, Faculty of Biology and Biotechnology, 9142 Ruhr University Bochum , D-44801 Bochum, Germany
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Mbatha SZ, Back CR, Devine AJ, Mulliner HM, Johns ST, Lewin H, Cheung KA, Zorn K, Stach JEM, Hayes MA, van der Kamp MW, Race PR, Willis CL. Antibiotic origami: selective formation of spirotetronates in abyssomicin biosynthesis. Chem Sci 2024:d4sc03253e. [PMID: 39144453 PMCID: PMC11318650 DOI: 10.1039/d4sc03253e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Accepted: 07/25/2024] [Indexed: 08/16/2024] Open
Abstract
The abyssomicins are a structurally intriguing family of bioactive natural products that include compounds with potent antibacterial, antitumour and antiviral activities. The biosynthesis of the characteristic abyssomicin spirotetronate core occurs via an enzyme-catalysed intramolecular Diels-Alder reaction, which proceeds via one of two distinct stereochemical pathways to generate products differing in configuration at the C15 spirocentre. Using the purified spirotetronate cyclases AbyU (from abyssomicin C/atrop-abyssomicin C biosynthesis) and AbmU (from abyssomicin 2/neoabyssomicin biosynthesis), in combination with synthetic substrate analogues, here we show that stereoselectivity in the spirotetronate-forming [4 + 2]-cycloaddition is controlled by a combination of factors attributable to both the enzyme and substrate. Furthermore, an achiral substrate was enzymatically cyclised to a single enantiomer of a spirocyclic product. X-ray crystal structures, molecular dynamics simulations, and assessment of substrate binding affinity and reactivity in both AbyU and AbmU establish the molecular determinants of stereochemical control in this important class of biocatalysts.
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Affiliation(s)
| | - Catherine R Back
- School of Biochemistry, University of Bristol Bristol BS8 1TD UK
| | - Andrew J Devine
- School of Chemistry, University of Bristol Bristol BS8 1TS UK
| | | | - Samuel T Johns
- School of Biochemistry, University of Bristol Bristol BS8 1TD UK
| | - Harry Lewin
- School of Biochemistry, University of Bristol Bristol BS8 1TD UK
| | - Kaiman A Cheung
- School of Chemistry, University of Bristol Bristol BS8 1TS UK
| | - Katja Zorn
- Compound Synthesis and Management, Discovery Sciences, Biopharmaceuticals R&D, AstraZeneca Pepparedsleden 1 431 83 Mölndal Sweden
| | - James E M Stach
- School of Natural and Environmental Sciences, Newcastle University Newcastle Upon Tyne NE1 7RU UK
| | - Martin A Hayes
- Compound Synthesis and Management, Discovery Sciences, Biopharmaceuticals R&D, AstraZeneca Pepparedsleden 1 431 83 Mölndal Sweden
| | | | - Paul R Race
- School of Biochemistry, University of Bristol Bristol BS8 1TD UK
- School of Natural and Environmental Sciences, Newcastle University Newcastle Upon Tyne NE1 7RU UK
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Zhang D, Du W, Pan X, Lin X, Li FR, Wang Q, Yang Q, Xu HM, Dong LB. Discovery and biosynthesis of bacterial drimane-type sesquiterpenoids from Streptomyces clavuligerus. Beilstein J Org Chem 2024; 20:815-822. [PMID: 38655553 PMCID: PMC11035983 DOI: 10.3762/bjoc.20.73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 04/04/2024] [Indexed: 04/26/2024] Open
Abstract
Drimane-type sesquiterpenoids (DMTs) are characterized by a distinctive 6/6 bicyclic skeleton comprising the A and B rings. While DMTs are commonly found in fungi and plants, their presence in bacteria has not been reported. Moreover, the biosynthetic pathways for DMTs have been primarily elucidated in fungi, with identified P450s only acting on the B ring. In this study, we isolated and characterized three bacterial DMTs, namely 3β-hydroxydrimenol (2), 2α-hydroxydrimenol (3), and 3-ketodrimenol (4), from Streptomyces clavuligerus. Through genome mining and heterologous expression, we identified a cav biosynthetic gene cluster responsible for the biosynthesis of DMTs 2-4, along with a P450, CavA, responsible for introducing the C-2 and C-3 hydroxy groups. Furthermore, the substrate scope of CavA revealed its ability to hydroxylate drimenol analogs. This discovery not only broadens the known chemical diversity of DMTs from bacteria, but also provides new insights into DMT biosynthesis in bacteria.
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Affiliation(s)
- Dongxu Zhang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Wenyu Du
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Xingming Pan
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Xiaoxu Lin
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Fang-Ru Li
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Qingling Wang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Qian Yang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Hui-Min Xu
- The Public Laboratory Platform, China Pharmaceutical University, Nanjing 211198, China
| | - Liao-Bin Dong
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
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Hill RA, Sutherland A. Hot off the Press. Nat Prod Rep 2023; 40:223-227. [PMID: 36756783 DOI: 10.1039/d3np90007j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
A personal selection of 32 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products, such as euphylonoid A from Euphorbia hylonoma.
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Affiliation(s)
- Robert A Hill
- School of Chemistry, Glasgow University, Glasgow, G12 8QQ, UK.
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Fisher JF, Mobashery S. β-Lactams from the Ocean. Mar Drugs 2023; 21:86. [PMID: 36827127 PMCID: PMC9963991 DOI: 10.3390/md21020086] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/21/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023] Open
Abstract
The title of this essay is as much a question as it is a statement. The discovery of the β-lactam antibiotics-including penicillins, cephalosporins, and carbapenems-as largely (if not exclusively) secondary metabolites of terrestrial fungi and bacteria, transformed modern medicine. The antibiotic β-lactams inactivate essential enzymes of bacterial cell-wall biosynthesis. Moreover, the ability of the β-lactams to function as enzyme inhibitors is of such great medical value, that inhibitors of the enzymes which degrade hydrolytically the β-lactams, the β-lactamases, have equal value. Given this privileged status for the β-lactam ring, it is therefore a disappointment that the exemplification of this ring in marine secondary metabolites is sparse. It may be that biologically active marine β-lactams are there, and simply have yet to be encountered. In this report, we posit a second explanation: that the value of the β-lactam to secure an ecological advantage in the marine environment might be compromised by its close structural similarity to the β-lactones of quorum sensing. The steric and reactivity similarities between the β-lactams and the β-lactones represent an outside-of-the-box opportunity for correlating new structures and new enzyme targets for the discovery of compelling biological activities.
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Affiliation(s)
- Jed F Fisher
- Department of Chemistry & Biochemistry, 354 McCourtney Hall, University of Note Dame, Notre Dame, IN 46656-5670, USA
| | - Shahriar Mobashery
- Department of Chemistry & Biochemistry, 354 McCourtney Hall, University of Note Dame, Notre Dame, IN 46656-5670, USA
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