4fsk
From Proteopedia
(Difference between revisions)
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| - | + | ==Urate oxidase-azide complex in anaerobic conditions== | |
| - | + | <StructureSection load='4fsk' size='340' side='right' caption='[[4fsk]], [[Resolution|resolution]] 1.98Å' scene=''> | |
| - | + | == Structural highlights == | |
| - | + | <table><tr><td colspan='2'>[[4fsk]] 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=4FSK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4FSK FirstGlance]. <br> | |
| - | ==Function== | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=AZI:AZIDE+ION'>AZI</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> |
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3p9f|3p9f]], [[3p9o|3p9o]]</td></tr> | ||
| + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">uaZ, uox ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=5059 Aspergillus flavus])</td></tr> | ||
| + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Factor_independent_urate_hydroxylase Factor independent urate hydroxylase], 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=4fsk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4fsk OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4fsk RCSB], [http://www.ebi.ac.uk/pdbsum/4fsk PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
[[http://www.uniprot.org/uniprot/URIC_ASPFL URIC_ASPFL]] Catalyzes the oxidation of uric acid to 5-hydroxyisourate, which is further processed to form (S)-allantoin. | [[http://www.uniprot.org/uniprot/URIC_ASPFL URIC_ASPFL]] Catalyzes the oxidation of uric acid to 5-hydroxyisourate, which is further processed to form (S)-allantoin. | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | BACKGROUND: Urate oxidase (EC 1.7.3.3 or UOX) catalyzes the conversion of uric acid and gaseous molecular oxygen to 5-hydroxyisourate and hydrogen peroxide, in the absence of cofactor or particular metal cation. The functional enzyme is a homo-tetramer with four active sites located at dimeric interfaces. RESULTS: The catalytic mechanism was investigated through a ternary complex formed between the enzyme, uric acid, and cyanide that stabilizes an intermediate state of the reaction. When uric acid is replaced by a competitive inhibitor, no complex with cyanide is formed. CONCLUSION: The X-ray structure of this compulsory ternary complex led to a number of mechanistic evidences that support a sequential mechanism in which the two reagents, dioxygen and a water molecule, process through a common site located 3.3 A above the mean plane of the ligand. This site is built by the side chains of Asn 254, and Thr 57, two conserved residues belonging to two different subunits of the homo-tetramer. The absence of a ternary complex between the enzyme, a competitive inhibitor, and cyanide suggests that cyanide inhibits the hydroxylation step of the reaction, after the initial formation of a hydroperoxyde type intermediate. | ||
| - | + | Structural analysis of urate oxidase in complex with its natural substrate inhibited by cyanide: mechanistic implications.,Gabison L, Prange T, Colloc'h N, El Hajji M, Castro B, Chiadmi M BMC Struct Biol. 2008 Jul 20;8:32. PMID:18638417<ref>PMID:18638417</ref> | |
| - | + | ||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
==See Also== | ==See Also== | ||
*[[Urate Oxidase|Urate Oxidase]] | *[[Urate Oxidase|Urate Oxidase]] | ||
| - | + | == References == | |
| - | == | + | <references/> |
| - | + | __TOC__ | |
| + | </StructureSection> | ||
[[Category: Aspergillus flavus]] | [[Category: Aspergillus flavus]] | ||
[[Category: Factor independent urate hydroxylase]] | [[Category: Factor independent urate hydroxylase]] | ||
| - | [[Category: Castro, B | + | [[Category: Castro, B]] |
| - | [[Category: Chiadmi, M | + | [[Category: Chiadmi, M]] |
| - | [[Category: Gabison, L | + | [[Category: Gabison, L]] |
| - | [[Category: H, N Colloc | + | [[Category: H, N Colloc]] |
| - | [[Category: Hajji, M El | + | [[Category: Hajji, M El]] |
| - | [[Category: Prange, T | + | [[Category: Prange, T]] |
[[Category: Degradation mechanism]] | [[Category: Degradation mechanism]] | ||
[[Category: Homotetramer]] | [[Category: Homotetramer]] | ||
Revision as of 07:53, 24 December 2014
Urate oxidase-azide complex in anaerobic conditions
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