View source for 1gkq


==D-Hydantoinase (Dihydropyrimidinase) from Thermus sp. in space group P212121==
<StructureSection load='1gkq' size='340' side='right'caption='[[1gkq]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1gkq]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_sp. Thermus sp.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GKQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GKQ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.6&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=KCX:LYSINE+NZ-CARBOXYLIC+ACID'>KCX</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1gkq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gkq OCA], [https://pdbe.org/1gkq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gkq RCSB], [https://www.ebi.ac.uk/pdbsum/1gkq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gkq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q7SIE9_THESP Q7SIE9_THESP] 
== 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/gk/1gkq_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/main_output.php?pdb_ID=1gkq ConSurf].
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== Publication Abstract from PubMed ==
Dihydropyrimidinases (hydantoinases) catalyse the reversible hydrolytic ring-opening of cyclic diamides such as dihydropyrimidines in the catabolism of pyrimidines. In biotechnology, these enzymes find application in the enantiospecific production of amino acids from racemic hydantoins. The crystal structure of a D-enantio-specific dihydropyrimidinase from Thermus sp. (D-hydantoinase) was solved de novo by multiwavelength anomalous diffraction phasing. In spite of a large unit cell the D-hydantoinase crystals exhibit excellent diffraction properties. The structure was subsequently refined at 1.30 A resolution against native data. The core of D-hydantoinase consists of a (alpha/beta)(8)-barrel, which is flanked by a beta-sheet domain and some additional helices. In the active site, a carboxylated lysine residue and the catalytically active hydroxide ion bridge a binuclear zinc centre. The tertiary structure and shape of the active site show strong homology to that of ureases, dihydroorotases, and phosphotriesterases. The homology of the active site was exploited for in silicio docking of substrates in the active site. This could shed light both on the substrate binding in hydantoinases and on the recently highly discussed origin of the proton in the course of hydantoinase catalysis.

X-ray structure of a dihydropyrimidinase from Thermus sp. at 1.3 A resolution.,Abendroth J, Niefind K, Schomburg D J Mol Biol. 2002 Jun 28;320(1):143-56. PMID:12079340<ref>PMID:12079340</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1gkq" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermus sp]]
[[Category: Abendroth J]]
[[Category: Niefind K]]
[[Category: Schomburg D]]