3vjm
From Proteopedia
Crystal structure of human depiptidyl peptidase IV (DPP-4) in complex with a prolylthiazolidine inhibitor #1
Structural highlights
Function[DPP4_HUMAN] 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.[1] [2] [3] [4] [5] [6] [7] [8] [9] Publication Abstract from PubMedHypoglycemic agents with a mechanism of depeptidyl peptidase IV (DPP-4) inhibition are suitable for once daily oral dosing. It is difficult to strike a balance between inhibitory activity and duration of action in plasma for inhibitors bearing an electrophilic nitrile group. We explored fused bicyclic heteroarylpiperazine substituted at the gamma-position of the proline structure in the investigation of l-prolylthiazolidines lacking the electrophilic nitrile. Among them, 2-trifluoroquinolyl compound 8g is the most potent, long-lasting DPP-4 inhibitor (IC(50)=0.37nmol/L) with high selectivity against other related peptidases. X-ray crystal structure determination of 8g indicates that CH-pi interactions generated between the quinolyl ring and the guanidinyl group of Arg358 enhances the DPP-4 inhibitory activity and selectivity. Fused bicyclic heteroarylpiperazine-substituted l-prolylthiazolidines as highly potent DPP-4 inhibitors lacking the electrophilic nitrile group.,Yoshida T, Akahoshi F, Sakashita H, Sonda S, Takeuchi M, Tanaka Y, Nabeno M, Kishida H, Miyaguchi I, Hayashi Y Bioorg Med Chem. 2012 Aug 15;20(16):5033-41. Epub 2012 Jul 5. PMID:22824762[10] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
| ||||||||||||||||||||||||
Categories: Dipeptidyl-peptidase IV | Human | Large Structures | Akahoshi, F | Ishii, S | Kishida, H | Miyaguchi, I | Yoshida, T | Alpha/beta | Aminopeptidase | Beta-propeller | Cell membrane | Diabetes | Glycoprotein | Hydrolase-hydrolase inhibitor complex | Serine protease | Signal-anchor | Transmembrane
