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| Main Authors: | , , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Journal of the American Chemical Society
2024
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/39454086/ |
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Table of Contents:
- Target Discovery of Dhilirane-Type Meroterpenoids by Biosynthesis Guidance and Tailoring Enzyme Catalysis. Sun, Zhaolun Wu, Mengyue Zhong, Boyuan Wu, Jingshuai Liu, Dong Ren, Jinwei Fan, Shilong Lin, Wenhan Fan, Aili Terpenes Biocatalysis Cytochrome P-450 Enzyme System Molecular Structure Animals Oxygenases Dhilirane-type meroterpenoids (DMs) featuring a 6/6/6/5/5 ring system represent a rare group of fungal meroterpenoids. To date, merely 11 DMs have been isolated or derived, leaving their chemical diversity predominantly unexplored. Herein, we leverage an understanding of biosynthesis to develop a workflow for discovery of DMs by genome mining, metabolite analysis, and tailoring enzyme catalysis. Twenty-three new DMs, including seven unprecedented scaffolds, were consequently identified. An α-ketoglutarate (α-KG)-dependent oxygenase DhiD was found to catalyze the stereodivergent ring contraction of dhilirolide D to form the dhilirane skeleton; while the cytochrome P450 DhiH reshaped the structural diversity by establishing diverse C-C bonds and oxidation. Crystallographic and mutagenesis experiments provide a molecular basis for the DhiD reaction and its stereodivergent products. Notably, DhiD exhibits substrate-controlled catalytic versatility in the chemical expansion of DMs through ring contraction, hydroxylation, dehydrogenation, epoxidation, isomerization, epimerization, and α-ketol cleavage. Bioassay results demonstrated that the obtained meroterpenoids exhibited anti-inflammatory and insecticidal activities. Our work provides insight into nature's arsenal for DM biosynthesis and the functional versatility of α-KG-dependent oxygenase and P450, which can be applied for target discovery and diversification of DM-type natural products.