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Selected Mutations Reveal New Intermediates in the Biosynthesis of Mupirocin and the Thiomarinol Antibiotics
Author(s) -
Gao ShuShan,
Wang Luoyi,
Song Zhongshu,
Hothersall Joanne,
Stevens Elton R.,
Connolly Jack,
Winn Peter J.,
Cox Russell J.,
Crump Matthew P.,
Race Paul R.,
Thomas Christopher M.,
Simpson Thomas J.,
Willis Christine L.
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201611590
Subject(s) - mupirocin , complementation , polyketide , biosynthesis , tetrahydropyran , chemistry , staphylococcus epidermidis , antibiotics , microbiology and biotechnology , staphylococcus aureus , stereochemistry , gene , biology , bacteria , ring (chemistry) , biochemistry , methicillin resistant staphylococcus aureus , phenotype , genetics , organic chemistry
Thiomarinol and mupirocin are assembled on similar polyketide/fatty acid backbones and exhibit potent antibiotic activity against methicillin‐resistant Staphylococcus aureus (MRSA). They both contain a tetrasubstituted tetrahydropyran (THP) ring that is essential for biological activity. Mupirocin is a mixture of pseudomonic acids (PAs). Isolation of the novel compound mupirocin P, which contains a 7‐hydroxy‐6‐keto‐substituted THP, from a ΔmupP strain and chemical complementation experiments confirm that the first step in the conversion of PA‐B into the major product PA‐A is oxidation at the C6 position. In addition, nine novel thiomarinol (TM) derivatives with different oxidation patterns decorating the central THP core were isolated after gene deletion ( tmlF ). These metabolites are in accord with the THP ring formation and elaboration in thiomarinol following a similar order to that found in mupirocin biosynthesis, despite the lack of some of the equivalent genes. Novel mupirocin–thiomarinol hybrids were also synthesized by mutasynthesis.