ID 2.3.1.293 DE meromycolic acid 3-oxoacyl-(acyl carrier protein) synthase I. AN beta-ketoacyl-acyl carrier protein synthase KasA. CA an ultra-long-chain mono-unsaturated fatty acyl-[ACP] + H(+) + malonyl- CA [ACP] = a 3-oxo-ultra-long-chain mono-unsaturated fatty acyl-[ACP] + CA CO2 + holo-[ACP]. CC -!- The enzyme is part of the fatty acid synthase (FAS) II system of CC mycobacteria, which extends modified products of the FAS I system, CC eventually forming meromycolic acids that are incorporated into CC mycolic acids. CC -!- Meromycolic acids consist of a long chain, typically 50-60 carbons, CC which is functionalized by different groups.Two 3-oxoacyl-(acyl CC carrier protein) synthases function within the FAS II system, encoded CC by the kasA and kasB genes. CC -!- The two enzymes share some sequence identity but function CC independently on separate sets of substrates. CC -!- KasA differs from KasB (EC 2.3.1.294), by preferring shorter (C-22 to CC C-36) and more saturated (only one double bond) substrates. DR P63455, KASA_MYCBO ; Q9CBS7, KASA_MYCLE ; H8ESN0, KASA_MYCTE ; DR P9WQD8, KASA_MYCTO ; P9WQD9, KASA_MYCTU ; //