1rgn: Difference between revisions

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New page: left|200px<br /><applet load="1rgn" size="450" color="white" frame="true" align="right" spinBox="true" caption="1rgn, resolution 2.80Å" /> '''Structure of the rea...
 
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'''Structure of the reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1 reconstituted with spheroidene'''<br />


==Overview==
==Structure of the reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1 reconstituted with spheroidene==
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.
<StructureSection load='1rgn' size='340' side='right'caption='[[1rgn]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
 
== Structural highlights ==
==About this Structure==
<table><tr><td colspan='2'>[[1rgn]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Cereibacter_sphaeroides Cereibacter sphaeroides]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RGN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1RGN FirstGlance]. <br>
1RGN is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Rhodobacter_sphaeroides Rhodobacter sphaeroides] with FE, PO4, BCL, BPH, U10, SPO and LDA as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1RGN OCA].  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
 
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BCL:BACTERIOCHLOROPHYLL+A'>BCL</scene>, <scene name='pdbligand=BPH:BACTERIOPHEOPHYTIN+A'>BPH</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=LDA:LAURYL+DIMETHYLAMINE-N-OXIDE'>LDA</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=SPO:SPHEROIDENE'>SPO</scene>, <scene name='pdbligand=U10:UBIQUINONE-10'>U10</scene></td></tr>
==Reference==
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1rgn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rgn OCA], [https://pdbe.org/1rgn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1rgn RCSB], [https://www.ebi.ac.uk/pdbsum/1rgn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1rgn ProSAT]</span></td></tr>
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:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15130469 15130469]
</table>
[[Category: Protein complex]]
== Function ==
[[Category: Rhodobacter sphaeroides]]
[https://www.uniprot.org/uniprot/RCEL_CERSP RCEL_CERSP] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis.
[[Category: Cogdell, R.J.]]
== Evolutionary Conservation ==
[[Category: Frank, H.A.]]
[[Image:Consurf_key_small.gif|200px|right]]
[[Category: Isaacs, N.W.]]
Check<jmol>
[[Category: McKendrick, K.]]
  <jmolCheckbox>
[[Category: Mitchell, I.A.]]
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/rg/1rgn_consurf.spt"</scriptWhenChecked>
[[Category: Roszak, A.W.]]
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
[[Category: BCL]]
    <text>to colour the structure by Evolutionary Conservation</text>
[[Category: BPH]]
  </jmolCheckbox>
[[Category: FE]]
</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=1rgn ConSurf].
[[Category: LDA]]
<div style="clear:both"></div>
[[Category: PO4]]
__TOC__
[[Category: SPO]]
</StructureSection>
[[Category: U10]]
[[Category: Cereibacter sphaeroides]]
[[Category: carotenoid binding site]]
[[Category: Large Structures]]
[[Category: membrane protein]]
[[Category: Cogdell RJ]]
[[Category: photosynthesis]]
[[Category: Frank HA]]
[[Category: photosynthetic reaction center]]
[[Category: Isaacs NW]]
[[Category: reconstituted carotenoid]]
[[Category: McKendrick K]]
 
[[Category: Mitchell IA]]
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 01:35:00 2007''
[[Category: Roszak AW]]

Latest revision as of 11:22, 14 February 2024

Structure of the reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1 reconstituted with spheroideneStructure of the reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1 reconstituted with spheroidene

Structural highlights

1rgn is a 3 chain structure with sequence from Cereibacter sphaeroides. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.8Å
Ligands:, , , , , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

RCEL_CERSP The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

1rgn, resolution 2.80Å

Drag the structure with the mouse to rotate

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