ID 6.2.1.57 DE long-chain fatty acid adenylase/transferase FadD23. AN long-chain fatty acid adenylyltransferase FadD23. CA (1) holo-[(hydroxy)phthioceranic acid synthase] + octadecanoate + ATP = CA octadecanoyl-[(hydroxy)phthioceranic acid synthase] + AMP + diphosphate. CA (2) holo-[(hydroxy)phthioceranic acid synthase] + hexadecanoate + ATP = CA hexadecanoyl-[(hydroxy)phthioceranic acid synthase] + AMP + diphosphate. CC -!- This mycobacterial enzyme activates palmitate and stearate by CC adenylation, followed by their loading onto the polyketide synthase CC EC 2.3.1.287. DR Q7TVK7, FAA23_MYCBO; P9WQ46, FAA23_MYCTO; P9WQ47, FAA23_MYCTU; //