3t6b

Structure of human DPPIII in complex with the opioid peptide Tynorphin, at 2.4 Angstroms

spinqualitylabelsall models 3t6b, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3t6b is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.4Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function DPP3_HUMAN Cleaves Arg-Arg-beta-naphthylamide. Publication Abstract from PubMed Opioid peptides are involved in various essential physiological processes, most notably nociception. Dipeptidyl peptidase III (DPP III) is one of the most important enkephalin-degrading enzymes associated with the mammalian pain modulatory system. Here we describe the X-ray structures of human DPP III and its complex with the opioid peptide tynorphin, which rationalize the enzyme's substrate specificity and reveal an exceptionally large domain motion upon ligand binding. Microcalorimetric analyses point at an entropy-dominated process, with the release of water molecules from the binding cleft ("entropy reservoir") as the major thermodynamic driving force. Our results provide the basis for the design of specific inhibitors that enable the elucidation of the exact role of DPP III and the exploration of its potential as a target of pain intervention strategies. Entropy-driven binding of opioid peptides induces a large domain motion in human dipeptidyl peptidase III.,Bezerra GA, Dobrovetsky E, Viertlmayr R, Dong A, Binter A, Abramic M, Macheroux P, Dhe-Paganon S, Gruber K Proc Natl Acad Sci U S A. 2012 Apr 24;109(17):6525-30. Epub 2012 Apr 9. PMID:22493238 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Dipeptidyl peptidase 3D structures

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