Human DPP4 (Dipeptidyl Peptidase IV) CLIA Kit

Dipeptidyl Peptidase 4; Adabp; Adenosine Deaminase Complexing Protein 2; Adcp-2; Dipeptidyl Peptidase Iv; Dpp Iv; T-Cell Activation Antigen Cd26; Tp103; Cd Antigen Cd26 Cleaved Into - Dipeptidyl Peptidase 4 Membrane Form; Dipeptidyl Peptidase Iv Membrane Form - Dipeptidyl Peptidase 4 Soluble Form; Dipeptidyl Peptidase Iv Soluble Form

Uniprot ID: SF01_HUMAN ; Reactome: R-HSA-381771 ; Gene ID: 1803

Tissue Specificity: Expressed specifically in lymphatic vessels but not in blood vessels in the skin, small intestine, esophagus, ovary, breast and prostate glands. Not detected in lymphatic vessels in the lung, kidney, uterus, liver and stomach (at protein level). Expressed in the poorly differentiated crypt cells of the small intestine as well as in the mature villous cells. Expressed at very low levels in the colon.

Function: 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.