2fxl
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Urate oxidase from aspergillus flavus complexed with allantoin
OverviewOverview
Urate oxidase from Aspergillus flavus catalyzes the degradation of uric, acid to [S]-allantoin through 5-hydroxyisourate as a metastable, intermediate. The second degradation step is thought either catalyzed by, another specific enzyme, or spontaneous. The structure of the enzyme was, known at high resolution by X-ray diffraction of I222 crystals complexed, with a purine-type inhibitor (8-azaxanthin). Analyzing the X-ray structure, of urate oxidase treated with an excess of urate, the natural substrate, shows unexpectedly that the active site recaptures [S]-allantoin from the, racemic end product of a second degradation step.
About this StructureAbout this Structure
2FXL is a Single protein structure of sequence from Aspergillus flavus with 2AL as ligand. Active as Urate oxidase, with EC number 1.7.3.3 Full crystallographic information is available from OCA.
ReferenceReference
Recapture of [S]-allantoin, the product of the two-step degradation of uric acid, by urate oxidase., Gabison L, Chiadmi M, Colloc'h N, Castro B, El Hajji M, Prange T, FEBS Lett. 2006 Apr 3;580(8):2087-91. Epub 2006 Mar 10. PMID:16545381
Page seeded by OCA on Wed Nov 21 10:49:31 2007