1dv3

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[[Image:1dv3.gif|left|200px]]
 
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==PHOTOSYNTHETIC REACTION CENTER FROM RHODOBACTER SPHAEROIDES IN THE CHARGE-SEPARATED D+QAQB-STATE WITH THE PROTON TRANSFER INHIBITOR CD2+==
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The line below this paragraph, containing "STRUCTURE_1dv3", creates the "Structure Box" on the page.
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<StructureSection load='1dv3' size='340' side='right'caption='[[1dv3]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1dv3]] is a 6 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=1DV3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DV3 FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
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<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=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=LDA:LAURYL+DIMETHYLAMINE-N-OXIDE'>LDA</scene>, <scene name='pdbligand=U10:UBIQUINONE-10'>U10</scene></td></tr>
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{{STRUCTURE_1dv3| PDB=1dv3 | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1dv3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dv3 OCA], [https://pdbe.org/1dv3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dv3 RCSB], [https://www.ebi.ac.uk/pdbsum/1dv3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dv3 ProSAT]</span></td></tr>
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</table>
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'''PHOTOSYNTHETIC REACTION CENTER FROM RHODOBACTER SPHAEROIDES IN THE CHARGE-SEPARATED D+QAQB-STATE WITH THE PROTON TRANSFER INHIBITOR CD2+'''
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== Function ==
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[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.
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== Evolutionary Conservation ==
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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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The reaction center (RC) from Rhodobacter sphaeroides couples light-driven electron transfer to protonation of a bound quinone acceptor molecule, Q(B), within the RC. The binding of Cd(2+) or Zn(2+) has been previously shown to inhibit the rate of reduction and protonation of Q(B). We report here on the metal binding site, determined by x-ray diffraction at 2.5-A resolution, obtained from RC crystals that were soaked in the presence of the metal. The structures were refined to R factors of 23% and 24% for the Cd(2+) and Zn(2+) complexes, respectively. Both metals bind to the same location, coordinating to Asp-H124, His-H126, and His-H128. The rate of electron transfer from Q(A)(-) to Q(B) was measured in the Cd(2+)-soaked crystal and found to be the same as in solution in the presence of Cd(2+). In addition to the changes in the kinetics, a structural effect of Cd(2+) on Glu-H173 was observed. This residue was well resolved in the x-ray structure-i.e., ordered-with Cd(2+) bound to the RC, in contrast to its disordered state in the absence of Cd(2+), which suggests that the mobility of Glu-H173 plays an important role in the rate of reduction of Q(B). The position of the Cd(2+) and Zn(2+) localizes the proton entry into the RC near Asp-H124, His-H126, and His-H128. Based on the location of the metal, likely pathways of proton transfer from the aqueous surface to Q(B) are proposed.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dv/1dv3_consurf.spt"</scriptWhenChecked>
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1DV3 is a [[Protein complex]] structure of sequences 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=1DV3 OCA].
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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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==Reference==
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</jmolCheckbox>
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Determination of the binding sites of the proton transfer inhibitors Cd2+ and Zn2+ in bacterial reaction centers., Axelrod HL, Abresch EC, Paddock ML, Okamura MY, Feher G, Proc Natl Acad Sci U S A. 2000 Feb 15;97(4):1542-7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10677497 10677497]
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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/main_output.php?pdb_ID=1dv3 ConSurf].
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[[Category: Protein complex]]
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<div style="clear:both"></div>
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[[Category: Rhodobacter sphaeroides]]
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__TOC__
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[[Category: Abresch, E C.]]
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</StructureSection>
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[[Category: Axelrod, H L.]]
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[[Category: Cereibacter sphaeroides]]
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[[Category: Feher, G.]]
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[[Category: Large Structures]]
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[[Category: Okamura, M Y.]]
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[[Category: Abresch EC]]
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[[Category: Paddock, M L.]]
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[[Category: Axelrod HL]]
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[[Category: Bacterial photosynthesis]]
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[[Category: Feher G]]
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[[Category: Cation binding]]
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[[Category: Okamura MY]]
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[[Category: Integral membrane protein]]
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[[Category: Paddock ML]]
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[[Category: Metal ion binding]]
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[[Category: Proton transfer]]
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[[Category: Rhodobacter sphaeroide]]
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[[Category: X-ray crystallography]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 14:18:53 2008''
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Current revision

PHOTOSYNTHETIC REACTION CENTER FROM RHODOBACTER SPHAEROIDES IN THE CHARGE-SEPARATED D+QAQB-STATE WITH THE PROTON TRANSFER INHIBITOR CD2+

PDB ID 1dv3

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