View source for 3hkp


==Crystal structure determination of Catechol 1,2-Dioxygenase from Rhodococcus opacus 1CP in complex with protocatechuate==
<StructureSection load='3hkp' size='340' side='right'caption='[[3hkp]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3hkp]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Rhodococcus_opacus Rhodococcus opacus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3HKP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3HKP 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]] 1.85&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=6PL:(4S,7R)-4-HYDROXY-N,N,N-TRIMETHYL-9-OXO-7-[(PALMITOYLOXY)METHYL]-3,5,8-TRIOXA-4-PHOSPHAHEXACOSAN-1-AMINIUM+4-OXIDE'>6PL</scene>, <scene name='pdbligand=DHB:3,4-DIHYDROXYBENZOIC+ACID'>DHB</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</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=3hkp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3hkp OCA], [https://pdbe.org/3hkp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3hkp RCSB], [https://www.ebi.ac.uk/pdbsum/3hkp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3hkp ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CATA_RHOOP CATA_RHOOP] 
== 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/hk/3hkp_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=3hkp ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The first crystallographic structures of a catechol 1,2-dioxygenase from a Gram-positive bacterium Rhodococcus opacus 1CP (Rho 1,2-CTD), a Fe(III) ion containing enzyme specialized in the aerobic biodegradation of catechols, and its adducts with catechol, 3-methylcatechol, 4-methylcatechol, pyrogallol (benzene-1,2,3-triol), 3-chlorocatechol, 4-chlorocatechol, 3,5-dichlorocatechol, 4,5-dichlorocatechol and protocatechuate (3,4-dihydroxybenzoate) have been determined and analyzed. This study represents the first extensive characterization of catechols adducts of 1,2-CTDs. The structural analyses reveal the diverse modes of binding to the active metal iron ion of the tested catechols thus allowing to identify the residues selectively involved in recognition of the diverse substrates by this class of enzymes. The comparison is further extended to the structural and functional characteristics of the other 1,2-CTDs isolated from Gram-positive and Gram-negative bacteria. Moreover the high structural homology of the present enzyme with the 3-chlorocatechol 1,2-dioxygenase from the same bacterium are discussed in terms of their different substrate specificity. The catalytic rates for Rho 1,2-CTD conversion of the tested compounds are also compared with the calculated energies of the highest occupied molecular orbital (E(HOMO)) of the substrates. A quantitative relationship (R=0.966) between the ln k(cat) and the calculated electronic parameter E(HOMO) was obtained for catechol, 3-methylcatechol, 4-methylcatechol, pyrogallol, 3-chlorocatechol, 4-chlorocatechol. This indicates that for these substrates the rate-limiting step of the reaction cycle is dependent on their nucleophilic reactivity. The discrepancies observed in the quantitative relationship for 3,5-dichlorocatechol, 4,5-dichlorocatechol and protocatechuate are ascribed to the sterical hindrances leading to the distorted binding of such catechols observed in the corresponding structures.

Catechol 1,2-dioxygenase from the Gram-positive Rhodococcus opacus 1CP: quantitative structure/activity relationship and the crystal structures of native enzyme and catechols adducts.,Matera I, Ferraroni M, Kolomytseva M, Golovleva L, Scozzafava A, Briganti F J Struct Biol. 2010 Jun;170(3):548-64. Epub 2009 Dec 28. PMID:20040374<ref>PMID:20040374</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 3hkp" style="background-color:#fffaf0;"></div>

==See Also==
*[[Dioxygenase 3D structures|Dioxygenase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Rhodococcus opacus]]
[[Category: Briganti F]]
[[Category: Ferraroni M]]
[[Category: Kolomytseva M]]
[[Category: Matera I]]
[[Category: Scozzafava A]]