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Crystal structure of urate oxidase at 140 MPaCrystal structure of urate oxidase at 140 MPa
Structural highlights
FunctionURIC_ASPFL Catalyzes the oxidation of uric acid to 5-hydroxyisourate, which is further processed to form (S)-allantoin. 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 PubMedWe report the three-dimensional structure determined by high-pressure macromolecular crystallography (HPMX) of a 135-kDa homo-tetrameric enzyme, urate oxidase from Aspergillus flavus complexed with its potent inhibitor 8-azaxanthin. Urate oxidase crystals are quite sensitive to pressure, as three-dimensional order is lost at about 180 MPa. A highly complete 2.3 A resolution data set was collected at 140 MPa, close to the critical pressure. Crystal structures at atmospheric pressure and at high pressure were refined in the orthorhombic space group I222 with final crystallographic R factors 14.1% and 16.1%, respectively. The effect of pressure on temperature factors, ordered water molecules, hydrogen bond lengths, contacts, buried surface areas as well as cavity volume was investigated. Results suggest that the onset of disruption of the tetrameric assembly by pressure has been captured in the crystalline state. High pressure macromolecular crystallography: the 140-MPa crystal structure at 2.3 A resolution of urate oxidase, a 135-kDa tetrameric assembly.,Colloc'h N, Girard E, Dhaussy AC, Kahn R, Ascone I, Mezouar M, Fourme R Biochim Biophys Acta. 2006 Mar;1764(3):391-7. Epub 2006 Jan 26. PMID:16478683[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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