Recognition of (2S)-aminomalonyl-acyl carrier protein (ACP) and (2R)-hydroxymalonyl-ACP by acyltransferases in zwittermicin A biosynthesis.

ABSTRACT: Polyketide synthases elongate a polyketide backbone by condensing carboxylic acid precursors that are thioesterified to either coenzyme A or an acyl carrier protein (ACP). Two of the three known ACP-linked extender units, (2S)-aminomalonyl-ACP and (2R)-hydroxymalonyl-ACP, are found in the biosynthesis of the agriculturally important antibiotic zwittermicin A. We previously reconstituted the formation of (2S)-aminomalonyl-ACP and (2R)-hydroxymalonyl-ACP from the primary metabolites l-serine and 1,3-bisphospho-d-glycerate. In this report, we characterize the two acyltransferases involved in the specific transfer of the (2S)-aminomalonyl and (2R)-hydroxymalonyl moieties from the ACPs associated with extender unit formation to the ACPs integrated into the polyketide synthase. This work establi

SUBMITTER: Chan YA 

PROVIDER: S-EPMC2860681 | biostudies-literature | 2010 May

REPOSITORIES: biostudies-literature