1rqk

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[[Image:1rqk.png|left|200px]]
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==Structure of the reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1 reconstituted with 3,4-dihydrospheroidene==
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<StructureSection load='1rqk' size='340' side='right' caption='[[1rqk]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1rqk]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhodobacter_sphaeroides Rhodobacter sphaeroides]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RQK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1RQK FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BCL:BACTERIOCHLOROPHYLL+A'>BCL</scene>, <scene name='pdbligand=BPH:BACTERIOPHEOPHYTIN+A'>BPH</scene>, <scene name='pdbligand=CDL:CARDIOLIPIN'>CDL</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=LDA:LAURYL+DIMETHYLAMINE-N-OXIDE'>LDA</scene>, <scene name='pdbligand=SP2:3,4-DIHYDROSPHEROIDENE'>SP2</scene>, <scene name='pdbligand=U10:UBIQUINONE-10'>U10</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1rg5|1rg5]], [[1rgn|1rgn]], [[4rcr|4rcr]]</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=1rqk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rqk OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1rqk RCSB], [http://www.ebi.ac.uk/pdbsum/1rqk 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/rq/1rqk_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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X-ray diffraction was used to determine high-resolution structures of the reaction center (RC) complex from the carotenoidless mutant, Rb. sphaeroides R-26.1, without or reconstituted with carotenoids. The results are compared with the structure of the RC from a semiaerobically grown Rb. sphaeroides strain 2.4.1. The investigation reveals the structure of the carotenoid in the different protein preparations, the nature of its binding site, and a plausible mechanism by which the carotenoid is incorporated unidirectionally in its characteristic geometric configuration. The structural data suggest that the accessibility of the carotenoid to the binding site is controlled by a specific "gatekeeper" residue which allows the carotenoid to approach the binding site from only one direction. Carotenoid binding to the protein is secured by hydrogen bonding to a separate "locking" amino acid. The study reveals the specific molecular interactions that control how the carotenoid protects the photosynthetic apparatus against photo-induced oxidative destruction.
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{{STRUCTURE_1rqk| PDB=1rqk | SCENE= }}
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Protein regulation of carotenoid binding; gatekeeper and locking amino acid residues in reaction centers of Rhodobacter sphaeroides.,Roszak AW, McKendrick K, Gardiner AT, Mitchell IA, Isaacs NW, Cogdell RJ, Hashimoto H, Frank HA Structure. 2004 May;12(5):765-73. PMID:15130469<ref>PMID:15130469</ref>
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===Structure of the reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1 reconstituted with 3,4-dihydrospheroidene===
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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_15130469}}
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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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[[1rqk]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhodobacter_sphaeroides Rhodobacter sphaeroides]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RQK OCA].
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</StructureSection>
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==Reference==
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<ref group="xtra">PMID:015130469</ref><references group="xtra"/>
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[[Category: Rhodobacter sphaeroides]]
[[Category: Rhodobacter sphaeroides]]
[[Category: Cogdell, R J.]]
[[Category: Cogdell, R J.]]

Revision as of 14:40, 29 September 2014

Structure of the reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1 reconstituted with 3,4-dihydrospheroidene

1rqk, resolution 2.70Å

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