This family of proteins contains an HEXXH motif, typical of zinc metallopeptidases. The family includes the E. coli effector protein NleD, which cleaves and inactivates c-Jun N-terminal kinase (JNK) [1].

1: Metalloprotease type III effectors that specifically cleave JNK and NF-kappaB. Baruch K, Gur-Arie L, Nadler C, Koby S, Yerushalmi G, Ben-Neriah Y, Yogev O, Shaulian E, Guttman C, Zarivach R, Rosenshine I; EMBO J. 2011;30:221-231. PMID:21113130