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| | <StructureSection load='5m7k' size='340' side='right'caption='[[5m7k]], [[Resolution|resolution]] 3.50Å' scene=''> | | <StructureSection load='5m7k' size='340' side='right'caption='[[5m7k]], [[Resolution|resolution]] 3.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5m7k]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Blastochloris_viridis Blastochloris viridis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5M7K OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5M7K FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5m7k]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Blastochloris_viridis Blastochloris viridis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5M7K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5M7K FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BCL:BACTERIOCHLOROPHYLL+A'>BCL</scene>, <scene name='pdbligand=BPB:BACTERIOPHEOPHYTIN+B'>BPB</scene>, <scene name='pdbligand=DGA:DIACYL+GLYCEROL'>DGA</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=HEC:HEME+C'>HEC</scene>, <scene name='pdbligand=MPG:[(Z)-OCTADEC-9-ENYL]+(2R)-2,3-BIS(OXIDANYL)PROPANOATE'>MPG</scene>, <scene name='pdbligand=MQ7:MENAQUINONE-7'>MQ7</scene>, <scene name='pdbligand=NS5:15-CIS-1,2-DIHYDRONEUROSPORENE'>NS5</scene>, <scene name='pdbligand=OTP:(2E,6E,10E,14E,18E,22E,26E)-3,7,11,15,19,23,27,31-OCTAMETHYLDOTRIACONTA-2,6,10,14,18,22,26,30-OCTAENYL+TRIHYDROGEN+DIPHOSPHATE'>OTP</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.5Å</td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=FME:N-FORMYLMETHIONINE'>FME</scene></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=BPB:BACTERIOPHEOPHYTIN+B'>BPB</scene>, <scene name='pdbligand=DGA:DIACYL+GLYCEROL'>DGA</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=FME:N-FORMYLMETHIONINE'>FME</scene>, <scene name='pdbligand=HEC:HEME+C'>HEC</scene>, <scene name='pdbligand=MPG:[(Z)-OCTADEC-9-ENYL]+(2R)-2,3-BIS(OXIDANYL)PROPANOATE'>MPG</scene>, <scene name='pdbligand=MQ7:MENAQUINONE-7'>MQ7</scene>, <scene name='pdbligand=NS5:15-CIS-1,2-DIHYDRONEUROSPORENE'>NS5</scene>, <scene name='pdbligand=OTP:(2E,6E,10E,14E,18E,22E,26E)-3,7,11,15,19,23,27,31-OCTAMETHYLDOTRIACONTA-2,6,10,14,18,22,26,30-OCTAENYL+TRIHYDROGEN+DIPHOSPHATE'>OTP</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5m7k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5m7k OCA], [http://pdbe.org/5m7k PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5m7k RCSB], [http://www.ebi.ac.uk/pdbsum/5m7k PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5m7k ProSAT]</span></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=5m7k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5m7k OCA], [https://pdbe.org/5m7k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5m7k RCSB], [https://www.ebi.ac.uk/pdbsum/5m7k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5m7k ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/RCEH_BLAVI RCEH_BLAVI]] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [[http://www.uniprot.org/uniprot/CYCR_BLAVI CYCR_BLAVI]] The reaction center of purple bacteria contains a tightly bound cytochrome molecule which re-reduces the photo oxidized primary electron donor.<ref>PMID:10736158</ref> [[http://www.uniprot.org/uniprot/RCEM_BLAVI RCEM_BLAVI]] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [[http://www.uniprot.org/uniprot/RCEL_BLAVI RCEL_BLAVI]] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. | + | [https://www.uniprot.org/uniprot/CYCR_BLAVI CYCR_BLAVI] The reaction center of purple bacteria contains a tightly bound cytochrome molecule which re-reduces the photo oxidized primary electron donor.<ref>PMID:10736158</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | [[Category: Blastochloris viridis]] | | [[Category: Blastochloris viridis]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Dunevall, E]] | + | [[Category: Dunevall E]] |
| - | [[Category: Johansson, L]] | + | [[Category: Johansson L]] |
| - | [[Category: Katona, G]] | + | [[Category: Katona G]] |
| - | [[Category: Neutze, R]] | + | [[Category: Neutze R]] |
| - | [[Category: Sharma, A S]] | + | [[Category: Sharma AS]] |
| - | [[Category: Wahlgren, W Y]] | + | [[Category: Wahlgren WY]] |
| - | [[Category: Photosynthesis]]
| + | |
| - | [[Category: Photosynthetic]]
| + | |
| - | [[Category: Reaction center]]
| + | |
| Structural highlights
5m7k is a 4 chain structure with sequence from Blastochloris viridis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Method: | X-ray diffraction, Resolution 3.5Å |
| Ligands: | , , , , , , , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
CYCR_BLAVI The reaction center of purple bacteria contains a tightly bound cytochrome molecule which re-reduces the photo oxidized primary electron donor.[1]
Publication Abstract from PubMed
Serial crystallography is an increasingly important approach to protein crystallography that exploits both X-ray free-electron laser (XFEL) and synchrotron radiation. Serial crystallography recovers complete X-ray diffraction data by processing and merging diffraction images from thousands of randomly oriented non-uniform microcrystals, of which all observations are partial Bragg reflections. Random fluctuations in the XFEL pulse energy spectrum, variations in the size and shape of microcrystals, integrating over millions of weak partial observations and instabilities in the XFEL beam position lead to new types of experimental errors. The quality of Bragg intensity estimates deriving from serial crystallography is therefore contingent upon assumptions made while modeling these data. Here it is observed that serial femtosecond crystallography (SFX) Bragg reflections do not follow a unimodal Gaussian distribution and it is recommended that an idealized assumption of single Gaussian peak profiles be relaxed to incorporate apparent asymmetries when processing SFX data. The phenomenon is illustrated by re-analyzing data collected from microcrystals of the Blastochloris viridis photosynthetic reaction center and comparing these intensity observations with conventional synchrotron data. The results show that skewness in the SFX observations captures the essence of the Wilson plot and an empirical treatment is suggested that can help to separate the diffraction Bragg intensity from the background.
Asymmetry in serial femtosecond crystallography data.,Sharma A, Johansson L, Dunevall E, Wahlgren WY, Neutze R, Katona G Acta Crystallogr A Found Adv. 2017 Mar 1;73(Pt 2):93-101. doi:, 10.1107/S2053273316018696. Epub 2017 Jan 30. PMID:28248658[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Chen IP, Mathis P, Koepke J, Michel H. Uphill electron transfer in the tetraheme cytochrome subunit of the Rhodopseudomonas viridis photosynthetic reaction center: evidence from site-directed mutagenesis. Biochemistry. 2000 Apr 4;39(13):3592-602. PMID:10736158
- ↑ Sharma A, Johansson L, Dunevall E, Wahlgren WY, Neutze R, Katona G. Asymmetry in serial femtosecond crystallography data. Acta Crystallogr A Found Adv. 2017 Mar 1;73(Pt 2):93-101. doi:, 10.1107/S2053273316018696. Epub 2017 Jan 30. PMID:28248658 doi:http://dx.doi.org/10.1107/S2053273316018696
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