Mycolic acid synthase enzyme complex (None standardized for the complex as a whole; individual constituents include FAS-I, FAS-II, Pks13, FadD32.)

The mycolic acid synthase enzyme complex is a modular, multi-enzyme system found in mycobacteria and related Corynebacterineae. It orchestrates the stepwise biosynthesis of mycolic acids, long-chain α-alkyl, β-hydroxylated fatty acids that are essential components of the mycobacterial cell wall. This process involves two primary fatty acid synthase systems (FAS-I and FAS-II) for chain elongation, followed by modification (cyclopropanation, methylation, oxidation), and a final condensation by Pks13. The product, mycolic acid, is critical for cell wall impermeability, survival within macrophages, and persistence in hostile environments. Inhibition of this synthesis, or its key enzymes, is lethal to Mycobacterium tuberculosis and forms the basis of multiple frontline and experimental anti-tubercular drugs[2][3][5][6][7][8].

Other names

Mycolate synthase complexMycolic acid biosynthetic machineryMycolic acid enzyme complex

Inhibition of fatty acid chain elongation (FAS-I, FAS-II, InhA inhibitors); Blockage of condensation step (Pks13 inhibitors); Interference with acyl activation/transfer (FadD32 inhibitors); Disruption of mycolic acid incorporation into cell wall, leading to bacterial death[2][4][6][7][8]