Abstract
A hybrid trans-AT PKS/NRPS gene cluster htm was identified with defined boundaries for hangtaimycin biosynthesis in Streptomyces spectabilis CPCC200148. Deoxyhangtaimycin, a new derivative of hangtaimycin, was identified from the htm11 gene knockout mutant. In vitro biochemical assays demonstrated that the cytochrome P450 monooxygenase Htm11 was responsible for the stereoselective hydroxylation of deoxyhangtaimycin to hangtaimycin. More importantly, deoxyhangtaimycin showed activity against influenza A virus at the micromolar level, highlighting its potential as an antiviral lead compound.
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