4na3
From Proteopedia
Crystal Structure of the second ketosynthase from the bacillaene polyketide synthase bound to a hexanoyl substrate mimic
Structural highlights
FunctionPKSJ_BACSU Involved in some intermediate steps for the synthesis of the antibiotic polyketide bacillaene which is involved in secondary metabolism.[1] [2] Publication Abstract from PubMedThe recently discovered trans-acyltransferase modular polyketide synthases catalyze the biosynthesis of a wide range of bioactive natural products in bacteria. Here we report the structure of the second ketosynthase from the bacillaene trans-acyltransferase polyketide synthase. This 1.95 A resolution structure provides the highest resolution view available of a modular polyketide synthase ketosynthase and reveals a flanking subdomain that is homologous to an ordered linker in cis-acyltransferase modular polyketide synthases. The structure of the cysteine-to-serine mutant of the ketosynthase acylated by its natural substrate provides high-resolution details of how a native polyketide intermediate is bound and helps explain the basis of ketosynthase substrate specificity. The substrate range of the ketosynthase was further investigated by mass spectrometry. A Close Look at a Ketosynthase from a Trans-Acyltransferase Modular Polyketide Synthase.,Gay DC, Gay G, Axelrod AJ, Jenner M, Kohlhaas C, Kampa A, Oldham NJ, Piel J, Keatinge-Clay AT Structure. 2014 Feb 4. pii: S0969-2126(14)00008-2. doi:, 10.1016/j.str.2013.12.016. PMID:24508341[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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