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Information on EC 2.3.1.180 - beta-ketoacyl-[acyl-carrier-protein] synthase III

for references in articles please use BRENDA:EC2.3.1.180
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IUBMB Comments
The enzyme is responsible for initiating straight-chain fatty acid biosynthesis by the dissociated (or type II) fatty-acid biosynthesis system that occurs in plants and bacteria. In contrast to EC 2.3.1.41, beta-ketoacyl-[acyl-carrier-protein] synthase I, and EC 2.3.1.179, beta-ketoacyl-[acyl-carrier-protein] synthase II, this enzyme specifically uses short-chain acyl-CoA thioesters (preferably acetyl-CoA) rather than acyl-[acp] as its substrate . The enzyme can also catalyse the reaction of EC 2.3.1.38, [acyl-carrier-protein] S-acetyltransferase, but to a much lesser extent . The enzymes from some organisms (e.g. the Gram-positive bacterium Streptococcus pneumoniae) can accept branched-chain acyl-CoAs in addition to acetyl-CoA (cf. EC 2.3.1.300, branched-chain beta-ketoacyl-[acyl-carrier-protein] synthase).
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The enzyme appears in viruses and cellular organisms
Synonyms
kas iii, mtfabh, kasiii, beta-ketoacyl-acyl carrier protein synthase iii, pqsbc, beta-ketoacyl-acyl carrier protein (acp) synthase iii, beta-ketoacyl-acp synthase iii, ecfabh, acetoacetyl-acp synthase, 3-ketoacyl-acp synthase iii, more