| Literature DB >> 26769357 |
Matthew J Bertin1, Alexandra Vulpanovici2, Emily A Monroe3, Anton Korobeynikov4, David H Sherman5, Lena Gerwick1, William H Gerwick6.
Abstract
Phormidolide is a polyketide produced by a cultured filamentous marine cyanobacterium and incorporates a 16-membered macrolactone. Its complex structure is recognizably derived from a polyketide synthase pathway, but possesses unique and intriguing structural features that prompted interest in investigating its biosynthetic origin. Stable isotope incorporation experiments confirmed the polyketide nature of this compound. We further characterized the phormidolide gene cluster (phm) through genome sequencing followed by bioinformatic analysis. Two discrete trans-type acyltransferase (trans-AT) ORFs along with KS-AT adaptor regions (ATd) within the polyketide synthase (PKS) megasynthases, suggest that the phormidolide gene cluster is a trans-AT PKS. Insights gained from analysis of the mode of acetate incorporation and ensuing keto reduction prompted our reevaluation of the stereochemistry of phormidolide hydroxy groups located along the linear polyketide chain.Entities:
Keywords: biosynthesis; macrolactones; phormidolide; polyketide synthase; trans-AT
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Year: 2015 PMID: 26769357 PMCID: PMC4878910 DOI: 10.1002/cbic.201500467
Source DB: PubMed Journal: Chembiochem ISSN: 1439-4227 Impact factor: 3.164