2cki | pdb_00002cki

Structure of Ulilysin, a member of the pappalysin family of metzincin metalloendopeptidases.

spinqualitylabelsall models 2cki, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2cki is a 2 chain structure with sequence from Metac. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ARG, CA, GOL, VAL, ZN NonStd Res: MSE Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [ULIL_METAC] Metalloprotease which in vitro specifically cleaves IGFBP-2 to -6, insulin, and extracellular matrix proteins but not IGFBP-1 or IGF-II. Shows a preference for substrates with an arginine in the P1' position, the first position downstream of the scissile bond. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The metzincin clan encompasses several families of zinc-dependent metalloproteases with proven function both in physiology and pathology. They act either as broad spectrum protein degraders or as sheddases, operating through limited proteolysis. Among the structurally uncharacterized metzincin families are the pappalysins, of which the most thoroughly studied member is human pregnancy-associated plasma protein A (PAPP-A), a heavily glycosylated 170-kDa multidomain protein specifically cleaving insulin-like growth factor (IGF)-binding proteins (IGFBPs). Proulilysin is a 38-kDa archaeal protein that shares sequence similarity with PAPP-A but encompasses only the pro-domain and the catalytic domain. It undergoes calcium-mediated autolytic activation, and the mature protein adopts a three-dimensional structure with two subdomains separated by an active site cleft containing the catalytic zinc ion. This structure is reminiscent of human members of the adamalysin/ADAMs (a disintegrin and a metalloprotease) family of metzincins. A bound dipeptide yields information on the substrate specificity of ulilysin, which specifically hydrolyzes IGFBP-2 to -6, insulin, and extracellular matrix proteins but not IGFBP-1 or IGF-II. Accordingly, ulilysin has higher proteolytic efficiency and a broader substrate specificity than human PAPP-A. The structure of ulilysin represents a prototype for the catalytic domain of pappalysins. Molecular analysis of ulilysin, the structural prototype of a new family of metzincin metalloproteases.,Tallant C, Garcia-Castellanos R, Seco J, Baumann U, Gomis-Ruth FX J Biol Chem. 2006 Jun 30;281(26):17920-8. Epub 2006 Apr 20. PMID:16627477 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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