This domain is found C-terminal to the PE (IPR000084) and PPE (IPR000030) domains. The secondary structure of this domain is predicted to be a mixture of alpha helices and beta strands, and recently demonstrated to be alpha/beta hydrolase: see Sultana et al. This protein domain is close to cutinase. The membrane-associated acyltransferase Chp1 (myctu-Rv3822) accepts a synthetic diacyl sulfolipid and transfers an acyl group regioselectively from one donor substrate molecule to a second acceptor molecule in two successive reactions to yield a tetraacylated product.The rv1184c locus encodes Chp2, an acyltransferase in polyacyltrehalose lipid biosynthesis In fact this domain is found in many unrelated folds only a few are alpha/beta hydrolases (Sultana 2016)
