The members of this family are membrane proteins. In some proteins this region is found associated with Pfam:PF02225. This family corresponds with Merops subfamily A22B, the type example of which is signal peptide peptidase. There is a sequence-similarity relationship with Pfam:PF01080.

1: Requirements for signal peptide peptidase-catalyzed intramembrane proteolysis. Lemberg MK, Martoglio B; Mol Cell 2002;10:735-744. PMID:12419218

2: Intramembrane proteolysis promotes trafficking of hepatitis C virus core protein to lipid droplets. McLauchlan J, Lemberg MK, Hope G, Martoglio B; EMBO J 2002;21:3980-3988. PMID:12145199

3: Identification of signal peptide peptidase, a presenilin-type aspartic protease. Weihofen A, Binns K, Lemberg MK, Ashman K, Martoglio B; Science 2002;296:2215-2218. PMID:12077416

4: Intramembrane proteolysis of signal peptides: an essential step in the generation of HLA-E epitopes. Lemberg MK, Bland FA, Weihofen A, Braud VM, Martoglio B; J Immunol 2001;167:6441-6446. PMID:11714810