3l8w
From Proteopedia
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| - | [[ | + | ==Urate oxidase from aspergillus flavus complexed with xanthin== |
| + | <StructureSection load='3l8w' size='340' side='right' caption='[[3l8w]], [[Resolution|resolution]] 1.00Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[3l8w]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Aspergillus_flavus Aspergillus flavus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3L8W OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3L8W FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=4PO:ALPHA-(4-PYRIDYL-1-OXIDE)-N-TERT-BUTYLNITRONE'>4PO</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=XAN:XANTHINE'>XAN</scene></td></tr> | ||
| + | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1r51|1r51]], [[1r4s|1r4s]], [[1r4u|1r4u]], [[1r56|1r56]], [[1wrr|1wrr]], [[1xt4|1xt4]], [[3l9g|3l9g]], [[3lbg|3lbg]]</td></tr> | ||
| + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Urate_oxidase Urate oxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.7.3.3 1.7.3.3] </span></td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3l8w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3l8w OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3l8w RCSB], [http://www.ebi.ac.uk/pdbsum/3l8w PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | == Evolutionary Conservation == | ||
| + | [[Image:Consurf_key_small.gif|200px|right]] | ||
| + | Check<jmol> | ||
| + | <jmolCheckbox> | ||
| + | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/l8/3l8w_consurf.spt"</scriptWhenChecked> | ||
| + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
| + | <text>to colour the structure by Evolutionary Conservation</text> | ||
| + | </jmolCheckbox> | ||
| + | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Urate oxidase (uricase; EC 1.7.3.3; UOX) from Aspergillus flavus catalyzes the oxidation of uric acid in the presence of molecular oxygen to 5-hydroxyisourate in the degradation cascade of purines; intriguingly, catalysis proceeds using neither a metal ion (Fe, Cu etc.) nor a redox cofactor. UOX is a tetrameric enzyme with four active sites located at the interface of two subunits; its structure was refined at atomic resolution (1 A) using new crystal data in the presence of xanthine and at near-atomic resolution (1.3-1.7 A) in complexes with the natural substrate (urate) and two inhibitors: 8-nitroxanthine and 8-thiouric acid. Three new features of the structural and mechanistic behaviour of the enzyme were addressed. Firstly, the high resolution of the UOX-xanthine structure allowed the solution of an old structural problem at a contact zone within the tetramer; secondly, the protonation state of the substrate was determined from both a halochromic inhibitor complex (UOX-8-nitroxanthine) and from the H-atom distribution in the active site, using the structures of the UOX-xanthine and the UOX-uric acid complexes; and thirdly, it was possible to extend the general base system, characterized by the conserved catalytic triad Thr-Lys-His, to a large water network that is able to buffer and shuttle protons back and forth between the substrate and the peroxo hole along the reaction pathway. | ||
| - | + | Near-atomic resolution structures of urate oxidase complexed with its substrate and analogues: the protonation state of the ligand.,Gabison L, Chiadmi M, El Hajji M, Castro B, Colloc'h N, Prange T Acta Crystallogr D Biol Crystallogr. 2010 Jun;66(Pt 6):714-24. Epub 2010 May 15. PMID:20516624<ref>PMID:20516624</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
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==See Also== | ==See Also== | ||
*[[Urate Oxidase|Urate Oxidase]] | *[[Urate Oxidase|Urate Oxidase]] | ||
| - | + | == References == | |
| - | == | + | <references/> |
| - | < | + | __TOC__ |
| + | </StructureSection> | ||
[[Category: Aspergillus flavus]] | [[Category: Aspergillus flavus]] | ||
[[Category: Urate oxidase]] | [[Category: Urate oxidase]] | ||
| - | [[Category: Chiadmi, M | + | [[Category: Chiadmi, M]] |
| - | [[Category: Gabison, L | + | [[Category: Gabison, L]] |
| - | [[Category: H, N Colloc | + | [[Category: H, N Colloc]] |
| - | [[Category: Prange, T | + | [[Category: Prange, T]] |
[[Category: Inhibition aspergillus flavus]] | [[Category: Inhibition aspergillus flavus]] | ||
[[Category: Oxidoreductase]] | [[Category: Oxidoreductase]] | ||
Revision as of 08:32, 9 December 2014
Urate oxidase from aspergillus flavus complexed with xanthin
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