1mps: Difference between revisions
New page: left|200px<br /><applet load="1mps" size="450" color="white" frame="true" align="right" spinBox="true" caption="1mps, resolution 2.55Å" /> '''PHOTOSYNTHETIC REACT... |
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== | ==PHOTOSYNTHETIC REACTION CENTER MUTANT WITH PHE M 197 REPLACED WITH ARG AND TYR M 177 REPLACED WITH PHE (CHAIN M, Y177F, F197R)== | ||
Reaction centers have been crystallized from the antenna-deficient RCO2 | <StructureSection load='1mps' size='340' side='right'caption='[[1mps]], [[Resolution|resolution]] 2.55Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1mps]] 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=1MPS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MPS FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.55Å</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=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=LDA:LAURYL+DIMETHYLAMINE-N-OXIDE'>LDA</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=SPN:SPEROIDENONE'>SPN</scene>, <scene name='pdbligand=U10:UBIQUINONE-10'>U10</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1mps FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mps OCA], [https://pdbe.org/1mps PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mps RCSB], [https://www.ebi.ac.uk/pdbsum/1mps PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mps ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[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. | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/mp/1mps_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</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=1mps ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Reaction centers have been crystallized from the antenna-deficient RCO2 strain of Rhodobacter sphaeroides, and a structural model has been constructed at 2.6 A resolution. The antenna-deficient strain allows assessment of the structural integrity of the reaction center at each stage in the purification-crystallization procedure. Spectroscopic evidence indicates that the properties of the reaction center bacteriopheophytins and the primary donor bacteriochlorophylls are modified somewhat on removal of the protein complex from the membrane and that these changes are carried through to the crystal form of the reaction center. The structure of a FM197R/YM177F mutant reaction center has also been determined to 2.55 A resolution. The mutant complex shows an unexpected change in structure, with a significant reorientation of the new arginine, the incorporation of a new water molecule into the structure, and rotation of the 2-acetyl carbonyl group of one of the primary donor bacteriochlorophylls to a more out-of-plane geometry. Changes in the optical spectrum of the FM197R/YM177F reaction center are discussed with respect to the altered structure of the complex. | |||
Structural studies of wild-type and mutant reaction centers from an antenna-deficient strain of Rhodobacter sphaeroides: monitoring the optical properties of the complex from bacterial cell to crystal.,McAuley-Hecht KE, Fyfe PK, Ridge JP, Prince SM, Hunter CN, Isaacs NW, Cogdell RJ, Jones MR Biochemistry. 1998 Apr 7;37(14):4740-50. PMID:9537989<ref>PMID:9537989</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
[[Category: | <div class="pdbe-citations 1mps" style="background-color:#fffaf0;"></div> | ||
[[Category: | == References == | ||
[[Category: Cogdell | <references/> | ||
[[Category: Fyfe | __TOC__ | ||
[[Category: Hunter | </StructureSection> | ||
[[Category: Isaacs | [[Category: Cereibacter sphaeroides]] | ||
[[Category: Jones | [[Category: Large Structures]] | ||
[[Category: Mcauley-Hecht | [[Category: Cogdell RJ]] | ||
[[Category: Prince | [[Category: Fyfe PK]] | ||
[[Category: Ridge | [[Category: Hunter CN]] | ||
[[Category: Isaacs NW]] | |||
[[Category: Jones MR]] | |||
[[Category: Mcauley-Hecht KE]] | |||
[[Category: Prince S]] | |||
[[Category: Ridge JP]] | |||
