Aliases for DPP4 Gene
External Ids for DPP4 Gene
Previous HGNC Symbols for DPP4 Gene
Previous GeneCards Identifiers for DPP4 Gene
The DPP4 gene encodes dipeptidyl peptidase 4, which is identical to adenosine deaminase complexing protein-2, and to the T-cell activation antigen CD26. It is an intrinsic type II transmembrane glycoprotein and a serine exopeptidase that cleaves X-proline dipeptides from the N-terminus of polypeptides. Dipeptidyl peptidase 4 is highly involved in glucose and insulin metabolism, as well as in immune regulation. This protein was shown to be a functional receptor for Middle East respiratory syndrome coronavirus (MERS-CoV), and protein modeling suggests that it may play a similar role with SARS-CoV-2, the virus responsible for COVID-19. [provided by RefSeq, Apr 2020]
GeneCards Summary for DPP4 Gene
DPP4 (Dipeptidyl Peptidase 4) is a Protein Coding gene. Diseases associated with DPP4 include Middle East Respiratory Syndrome and Nasopharyngitis. Among its related pathways are Collagen chain trimerization and Incretin synthesis, secretion, and inactivation. Gene Ontology (GO) annotations related to this gene include protein homodimerization activity and signaling receptor binding. An important paralog of this gene is FAP.
UniProtKB/Swiss-Prot Summary for DPP4 Gene
Cell surface glycoprotein receptor involved in the costimulatory signal essential for T-cell receptor (TCR)-mediated T-cell activation. Acts as a positive regulator of T-cell coactivation, by binding at least ADA, CAV1, IGF2R, and PTPRC. Its binding to CAV1 and CARD11 induces T-cell proliferation and NF-kappa-B activation in a T-cell receptor/CD3-dependent manner. Its interaction with ADA also regulates lymphocyte-epithelial cell adhesion. In association with FAP is involved in the pericellular proteolysis of the extracellular matrix (ECM), the migration and invasion of endothelial cells into the ECM. May be involved in the promotion of lymphatic endothelial cells adhesion, migration and tube formation. When overexpressed, enhanced cell proliferation, a process inhibited by GPC3. Acts also as a serine exopeptidase with a dipeptidyl peptidase activity that regulates various physiological processes by cleaving peptides in the circulation, including many chemokines, mitogenic growth factors, neuropeptides and peptide hormones. Removes N-terminal dipeptides sequentially from polypeptides having unsubstituted N-termini provided that the penultimate residue is proline.
Dipeptidyl Peptidase IV (DPP-IV) (also known as CD26) is a ubiquitous, membrane-bound enzyme that has several roles including in nutrition, metabolism, bone marrow mobilization, cancer growth, cell adhesion and within both the immune and endocrine systems.