ID 6.2.1.57 DE long-chain fatty acid adenylase/transferase FadD23. AN long-chain fatty acid adenylyltransferase FadD23. CA (1) ATP + holo-[(hydroxy)phthioceranic acid synthase] + octadecanoate = CA AMP + diphosphate + octadecanoyl-[(hydroxy)phthioceranic acid synthase]. CA (2) ATP + hexadecanoate + holo-[(hydroxy)phthioceranic acid synthase] = CA AMP + diphosphate + hexadecanoyl-[(hydroxy)phthioceranic acid synthase]. 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; //