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Information on EC - 10-deoxymethynolide synthase

for references in articles please use BRENDA:EC2.3.1.239
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IUBMB Comments
The product, 10-deoxymethynolide, contains a 12-membered ring and is an intermediate in the biosynthesis of methymycin in the bacterium Streptomyces venezuelae. The enzyme also produces narbonolide (see EC, narbonolide synthase). The enzyme has 29 active sites arranged in four polypeptides (pikAI - pikAIV) with a loading domain, six extension modules and a terminal thioesterase domain. Each extension module contains a ketosynthase (KS), keto reductase (KR), an acyltransferase (AT) and an acyl-carrier protein (ACP). Not all active sites are used in the biosynthesis.
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The enzyme appears in viruses and cellular organisms
methymycin/picromycin polyketide synthase, picromycin/methymycin PKS, picromycin/methymycin polyketide synthase, PICS, PikAI, PikAIII, PikAIV, pikromycin PKS, pikromycin polyketide synthase, type I polyketide synthase PikAIV, more
malonyl-CoA + 5 (2S)-methylmalonyl-CoA + 5 NADPH + 5 H+ = 10-deoxymethynolide + 6 CoA + 6 CO2 + 5 NADP+ + 2 H2O
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