1yqw

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{{STRUCTURE_1yqw| PDB=1yqw | SCENE= }}
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==Structure of the Oxidized Unready Form of Ni-Fe Hydrogenase==
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===Structure of the Oxidized Unready Form of Ni-Fe Hydrogenase===
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<StructureSection load='1yqw' size='340' side='right' caption='[[1yqw]], [[Resolution|resolution]] 1.83&Aring;' scene=''>
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{{ABSTRACT_PUBMED_15803334}}
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1yqw]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Desulfovibrio_fructosovorans Desulfovibrio fructosovorans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YQW OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1YQW FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BCT:BICARBONATE+ION'>BCT</scene>, <scene name='pdbligand=F3S:FE3-S4+CLUSTER'>F3S</scene>, <scene name='pdbligand=FCO:CARBONMONOXIDE-(DICYANO)+IRON'>FCO</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene>, <scene name='pdbligand=PER:PEROXIDE+ION'>PER</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1frf|1frf]], [[1yrq|1yrq]]</td></tr>
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<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Cytochrome-c3_hydrogenase Cytochrome-c3 hydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.12.2.1 1.12.2.1] </span></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=1yqw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yqw OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1yqw RCSB], [http://www.ebi.ac.uk/pdbsum/1yqw 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/yq/1yqw_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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[NiFe] hydrogenases catalyze the reversible heterolytic cleavage of molecular hydrogen. Several oxidized, inactive states of these enzymes are known that are distinguishable by their very different activation properties. So far, the structural basis for this difference has not been understood because of lack of relevant crystallographic data. Here, we present the crystal structure of the ready Ni-B state of Desulfovibrio fructosovorans [NiFe] hydrogenase and show it to have a putative mu-hydroxo Ni-Fe bridging ligand at the active site. On the other hand, a new, improved refinement procedure of the X-ray diffraction data obtained for putative unready Ni-A/Ni-SU states resulted in a more elongated electron density for the bridging ligand, suggesting that it is a diatomic species. The slow activation of the Ni-A state, compared with the rapid activation of the Ni-B state, is therefore proposed to result from the different chemical nature of the ligands in the two oxidized species. Our results along with very recent electrochemical studies suggest that the diatomic ligand could be hydro-peroxide.
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==Function==
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Structural differences between the ready and unready oxidized states of [NiFe] hydrogenases.,Volbeda A, Martin L, Cavazza C, Matho M, Faber BW, Roseboom W, Albracht SP, Garcin E, Rousset M, Fontecilla-Camps JC J Biol Inorg Chem. 2005 May;10(3):239-49. Epub 2005 Apr 1. PMID:15803334<ref>PMID:15803334</ref>
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[[http://www.uniprot.org/uniprot/PHNS_DESFR PHNS_DESFR]] Involved in hydrogen uptake for the anaerobic reduction of sulfate to hydrogen sulfide in an electron transport chain. Cytochrome c3 is the physiological electron acceptor.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[1yqw]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Desulfovibrio_fructosovorans Desulfovibrio fructosovorans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YQW OCA].
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</div>
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:015803334</ref><references group="xtra"/><references/>
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__TOC__
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</StructureSection>
[[Category: Cytochrome-c3 hydrogenase]]
[[Category: Cytochrome-c3 hydrogenase]]
[[Category: Desulfovibrio fructosovorans]]
[[Category: Desulfovibrio fructosovorans]]

Revision as of 09:01, 3 October 2014

Structure of the Oxidized Unready Form of Ni-Fe Hydrogenase

1yqw, resolution 1.83Å

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