Dipeptidylpeptidase IV, N-terminal domain (IPR002469)

Short name: Peptidase_S9B_N

Overlapping homologous superfamilies

Domain relationships



This domain defines serine peptidases belonging to MEROPS peptidase family S9 (clan SC), subfamily S9B (dipeptidyl-peptidase IV). The protein fold of the peptidase domain for members of this family resembles that of serine carboxypeptidase D, the type example of clan SC. This domain is an alignment of the region to the N-terminal side of the active site, which is found in IPR001375.

Dipeptidyl-peptidase IV (EC: is also called adenosine deaminase-binding protein (ADA-binding protein) or CD26. The exopeptidase cleaves off N-terminal X-Pro or X-Ala dipeptides from polypeptides (dipeptidyl peptidase IV activity). It serves as the costimulatory molecule in T cell activation and is an associated marker of autoimmune diseases, adenosine deaminase-deficiency and HIV pathogenesis [PMID: 1352530, PMID: 20959412, PMID: 21856036].

GO terms

Biological Process

GO:0006508 proteolysis

Molecular Function

No terms assigned in this category.

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.