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Information on EC 2.3.1.293 - meromycolic acid 3-oxoacyl-(acyl carrier protein) synthase I

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IUBMB Comments
The enzyme is part of the fatty acid synthase (FAS) II system of mycobacteria, which extends modified products of the FAS I system, eventually forming meromycolic acids that are incorporated into mycolic acids. Meromycolic acids consist of a long chain, typically 50-60 carbons, which is functionalized by different groups.Two 3-oxoacyl-(acyl carrier protein) synthases function within the FAS II system, encoded by the kasA and kasB genes. The two enzymes share some sequence identity but function independently on separate sets of substrates. KasA differs from KasB [EC 2.3.1.294, meromycolic acid 3-oxoacyl-(acyl carrier protein) synthase II], by preferring shorter (C-22 to C-36) and more saturated (only one double bond) substrates.
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The expected taxonomic range for this enzyme is: Mycobacteriaceae
Reaction Schemes
an ultra-long-chain mono-unsaturated acyl-[acyl-carrier protein]
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an ultra-long-chain mono-unsaturated 3-oxo-fatty acyl-[acyl-carrier protein]
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Synonyms
beta-ketoacyl ACP synthase, beta-ketoacyl ACP synthase I, beta-ketoacyl acyl carrier protein synthase, beta-ketoacyl-ACP synthase, beta-ketoacyl-AcpM synthase, beta-ketoacyl-AcpM synthase A, beta-ketoacyl-acyl carrier protein synthase, beta-ketoacyl-acyl carrier protein synthase KasA, beta-ketoacyl-acyl-carrier protein synthase, beta-ketoacylacyl synthase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
an ultra-long-chain mono-unsaturated acyl-[acyl-carrier protein] + a malonyl-[acyl-carrier protein] = an ultra-long-chain mono-unsaturated 3-oxo-fatty acyl-[acyl-carrier protein] + CO2 + a holo-[acyl-carrier protein]
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PATHWAY SOURCE
PATHWAYS
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