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- W2321865192 abstract "Modification of natural products with prenyl groups and the ensuing oxidative transformations are important for introducing structural complexity and biological activities. Penigequinolones (1) are potent insecticidal alkaloids that contain a highly modified 10-carbon prenyl group. Here we reveal an iterative prenylation mechanism for installing the 10-carbon unit using two aromatic prenyltransferases (PenI and PenG) present in the gene cluster of 1 from Penicillium thymicola. The initial Friedel-Crafts alkylation is catalyzed by PenI to yield dimethylallyl quinolone 6. The five-carbon side chain is then dehydrogenated by a flavin-dependent monooxygenase to give aryl diene 9, which serves as the electron-rich substrate for a second alkylation with dimethylallyl diphosphate to yield stryrenyl product 10. The completed, oxidized 10-carbon prenyl group then undergoes further structural morphing to yield yaequinolone C (12), the immediate precursor of 1. Our studies have therefore uncovered an unprecedented prenyl chain extension mechanism in natural product biosynthesis." @default.
- W2321865192 created "2016-06-24" @default.
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- W2321865192 date "2015-04-14" @default.
- W2321865192 modified "2023-10-15" @default.
- W2321865192 title "Tandem Prenyltransferases Catalyze Isoprenoid Elongation and Complexity Generation in Biosynthesis of Quinolone Alkaloids" @default.
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- W2321865192 doi "https://doi.org/10.1021/jacs.5b03022" @default.
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