This family consists of several bacterial antimicrobial peptide resistance and lipid A acylation (PagP) proteins. The bacterial outer membrane enzyme PagP transfers a palmitate chain from a phospholipid to lipid A. In a number of pathogenic Gram-negative bacteria, PagP confers resistance to certain cationic antimicrobial peptides produced during the host innate immune response.

1: Solution structure and dynamics of the outer membrane enzyme PagP by NMR. Hwang PM, Choy WY, Lo EI, Chen L, Forman-Kay JD, Raetz CR, Prive GG, Bishop RE, Kay LE; Proc Natl Acad Sci U S A 2002;99:13560-13565. PMID:12357033