IUBMB Enzyme Nomenclature


Accepted name: dipeptidyl-peptidase IV

Reaction: Release of an N-terminal dipeptide, Xaa-YaaZaa-, from a polypeptide, preferentially when Yaa is Pro, provided Zaa is neither Pro nor hydroxyproline

Other names: dipeptidyl aminopeptidase IV; Xaa-Pro-dipeptidyl-aminopeptidase; Gly-Pro naphthylamidase; postproline dipeptidyl aminopeptidase IV; lymphocyte antigen CD26; glycoprotein GP110; dipeptidyl peptidase IV; glycylproline aminopeptidase; glycylproline aminopeptidase; X-prolyl dipeptidyl aminopeptidase; pep X; leukocyte antigen CD26; glycylprolyl dipeptidylaminopeptidase; dipeptidyl-peptide hydrolase; glycylprolyl aminopeptidase; dipeptidyl-aminopeptidase IV; DPP IV/CD26; amino acyl-prolyl dipeptidyl aminopeptidase; T cell triggering molecule Tp103; X-PDAP

Comments: A homodimer. An integral protein of the plasma membrane of lymphocytes and other mammalian cells, in peptidase family S9 (prolyl oligopeptidase family). The reaction is similar to that of the unrelated EC Xaa-Pro dipeptidyl-peptidase of lactococci

Links to other databases: BRENDA, EXPASY, KEGG, MEROPS, Metacyc, PDB, CAS registry number: 54249-88-6


1. Misumi, Y., Hayashi, Y., Arakawa, F. and Ikehara, Y. Molecular cloning and sequence analysis of human dipeptidyl peptidase IV, a serine proteinase on the cell surface. Biochim. Biophys. Acta 1131 (1992) 333-336. [PMID: 1352704]

2. David, F., Bernard, A.-M., Pierres, M. and Marguet, D. Identification of serine 624, aspartic acid 702, and histidine 734 as the catalytic triad residues of mouse dipeptidyl-peptidase IV (CD26). A member of a novel family of nonclassical serine hydrolases. J. Biol. Chem. 268 (1993) 17247-17252. [PMID: 8102366]

3. Ikehara, Y., Ogata, S. and Misumi, Y. Dipeptidyl-peptidase IV from rat liver. Methods Enzymol. 244 (1994) 215-227. [PMID: 7845210]

[EC created 1981, modified 1996]

Return to EC 3.4.14 home page
Return to EC 3.4 home page
Return to EC 3 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page