2wiv

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[[Image:2wiv.png|left|200px]]
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==CYTOCHROME-P450 XPLA HEME DOMAIN P21==
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<StructureSection load='2wiv' size='340' side='right' caption='[[2wiv]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2wiv]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhodococcus Rhodococcus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WIV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2WIV FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2wiy|2wiy]]</td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2wiv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wiv OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2wiv RCSB], [http://www.ebi.ac.uk/pdbsum/2wiv PDBsum]</span></td></tr>
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<table>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/wi/2wiv_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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XplA is a cytochrome P450 of unique structural organization, consisting of a heme-domain that is C-terminally fused to its native flavodoxin redox partner. XplA, along with flavodoxin reductase XplB, has been shown to catalyze the breakdown of the nitramine explosive and pollutant hexahydro-1,3,5-trinitro-1,3,5-triazine (royal demolition explosive) by reductive denitration. The structure of the heme domain of XplA (XplA-heme) has been solved in two crystal forms: as a dimer in space group P2(1) to a resolution of 1.9 A and as a monomer in space group P2(1)2(1)2 to a resolution of 1.5 A, with the ligand imidazole bound at the heme iron. Although it shares the overall fold of cytochromes P450 of known structure, XplA-heme is unusual in that the kinked I-helix that traverses the distal face of the heme is broken by Met-394 and Ala-395 in place of the well conserved Asp/Glu plus Thr/Ser, important in oxidative P450s for the scission of the dioxygen bond prior to substrate oxygenation. The heme environment of XplA-heme is hydrophobic, featuring a cluster of three methionines above the heme, including Met-394. Imidazole was observed bound to the heme iron and is in close proximity to the side chain of Gln-438, which is situated over the distal face of the heme. Imidazole is also hydrogen-bonded to a water molecule that sits in place of the threonine side-chain hydroxyl exemplified by Thr-252 in Cyt-P450cam. Both Gln-438 --&gt; Ala and Ala-395 --&gt; Thr mutants of XplA-heme displayed markedly reduced activity compared with the wild type for royal demolition explosive degradation when combined with surrogate electron donors.
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{{STRUCTURE_2wiv| PDB=2wiv | SCENE= }}
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The 1.5-A structure of XplA-heme, an unusual cytochrome P450 heme domain that catalyzes reductive biotransformation of royal demolition explosive.,Sabbadin F, Jackson R, Haider K, Tampi G, Turkenburg JP, Hart S, Bruce NC, Grogan G J Biol Chem. 2009 Oct 9;284(41):28467-75. Epub 2009 Aug 19. PMID:19692330<ref>PMID:19692330</ref>
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===CYTOCHROME-P450 XPLA HEME DOMAIN P21===
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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{{ABSTRACT_PUBMED_19692330}}
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== References ==
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<references/>
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==About this Structure==
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__TOC__
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[[2wiv]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhodococcus Rhodococcus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WIV OCA].
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</StructureSection>
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==Reference==
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<ref group="xtra">PMID:019692330</ref><references group="xtra"/>
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[[Category: Rhodococcus]]
[[Category: Rhodococcus]]
[[Category: Bruce, N C.]]
[[Category: Bruce, N C.]]

Revision as of 01:47, 1 October 2014

CYTOCHROME-P450 XPLA HEME DOMAIN P21

2wiv, resolution 1.90Å

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