This is the C-terminal domain found in N-acyltransferase (NAT) proteins present in Actinoplanes teichomyceticus. In this organism, NAT proteins are responsible for N-acylation in the synthesis of the antibiotic teicoplanin. The C-terminal domain undergoes a substantial conformational change upon binding to Acyl-CoA. The C-terminal domain is considered Gcn5-related N-acetyltransferase like (GNAT-like) but differs from the canonical GNAT fold in that it lacks the first beta strand and has an additional four alpha helices [1].

1: Multiple complexes of long aliphatic N-acyltransferases lead to synthesis of 2,6-diacylated/2-acyl-substituted glycopeptide antibiotics, effectively killing vancomycin-resistant enterococcus. Lyu SY, Liu YC, Chang CY, Huang CJ, Chiu YH, Huang CM, Hsu NS, Lin KH, Wu CJ, Tsai MD, Li TL; J Am Chem Soc. 2014;136:10989-10995. PMID:25095906