Mycolic acid synthase

"Mycolic acid synthase" is not a single, well-defined enzyme or protein but refers to the *biosynthetic pathway* responsible for the generation of mycolic acids. Mycolic acids are essential long-chain fatty acids in the cell envelope of Mycobacterium species, including *M. tuberculosis*. This pathway comprises a network of enzymes—primarily fatty acid synthase I (FAS-I), fatty acid synthase II (FAS-II), and other assembly, modification, and transport proteins such as Pks13 and FadD32. The major biosynthetic steps include the synthesis and elongation of fatty acids (FAS-I and FAS-II), chain modification by methyltransferases, condensation by polyketide synthase (Pks13), and activation/transport steps (FadD32, MmpL3). Accurate reference to a specific "mycolic acid synthase" should point to defined enzymes, not an individual synthase, as none is universally acknowledged by this generic name. Multiple drug targets in tuberculosis therapy are enzymes within this pathway, notably InhA, KasA, FadD32, and Pks13[1][2][3][7][8]. **Additional clarification:** - The term "mycolic acid synthase" is ambiguous and not standard for a unique gene or protein. Databases and primary literature instead describe the activity as carried out by a *pathway* or specific enzymes, such as fatty acid synthase, polyketide synthase, or associated transferases. - If a canonical, unique target is required, use the specific enzyme name, e.g., "Polyketide synthase 13 (Pks13)", "Enoyl-ACP reductase (InhA)", or "β-Ketoacyl-ACP synthase (KasA)"[3].

Other names

Fatty acid synthase I (FAS-I)Fatty acid synthase II (FAS-II)various enzymes within mycolic acid pathway (KasA, KasB, InhA, MabA, Pks13, FadD32, etc.)

Enzyme inhibition (notably inhibition of fatty acid synthesis, mycolic acid chain elongation, polyketide condensation, methyltransferase modification, or transporter function)