Jenner M, Afonso JP, Kohlhaas C, Karbaum P, Frank S, Piel J, Oldham NJ. Acyl hydrolases from trans-AT polyketide synthases target acetyl units on acyl carrier proteins.
Chem Commun (Camb) 2016;
52:5262-5. [PMID:
27003309 DOI:
10.1039/c6cc01453d]
[Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Acyl hydrolase (AH) domains are a common feature of trans-AT PKSs. They have been hypothesised to perform a proofreading function by removing acyl chains from stalled sites. This study determines the substrate tolerance of the AH PedC for a range of acyl-ACPs. Clear preference towards short, linear acyl-ACPs is shown, with acetyl-ACP the best substrate. These results imply a more targeted housekeeping role for PedC: namely the removal of unwanted acetyl groups from ACP domains caused by erroneous transfer of acetyl-CoA, or possibly by decarboxylation of malonyl-ACP.
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