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Ambruticins and jerangolids are structurally related antifungal polyketides produced by Sorangium cellulosum strains. Comparative analysis of the gene clusters and characterization of compounds produced by gene knockout strains suggested hypothetical schemes for biosynthesis of these compounds. Polyketide synthase (PKS) architecture suggests that the pyran ring structure common to ambruticins and...
Geldanamycin, a polyketide natural product, is of significant interest for development of new anticancer drugs that target the protein chaperone Hsp90. While the chemically reactive groups of geldanamycin have been exploited to make a number of synthetic analogs, including 17-allylamino-17-demethoxy geldanamycin (17-AAG), currently in clinical evaluation, the “inert” groups of the molecule remain...
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