2axt

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{{Seed}}
 
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[[Image:2axt.png|left|200px]]
 
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==Crystal Structure of Photosystem II from Thermosynechococcus elongatus==
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The line below this paragraph, containing "STRUCTURE_2axt", creates the "Structure Box" on the page.
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<StructureSection load='2axt' size='340' side='right'caption='[[2axt]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
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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'>[[2axt]] is a 20 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermosynechococcus_vestitus Thermosynechococcus vestitus] and [https://en.wikipedia.org/wiki/Thermosynechococcus_vestitus_BP-1 Thermosynechococcus vestitus BP-1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AXT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2AXT FirstGlance]. <br>
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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]] 3&#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=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=BCT:BICARBONATE+ION'>BCT</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=DGD:DIGALACTOSYL+DIACYL+GLYCEROL+(DGDG)'>DGD</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=MGE:(1S)-2-(ALPHA-L-ALLOPYRANOSYLOXY)-1-[(TRIDECANOYLOXY)METHYL]ETHYL+PALMITATE'>MGE</scene>, <scene name='pdbligand=PHO:PHEOPHYTIN+A'>PHO</scene>, <scene name='pdbligand=PQ9:5-[(2E,6E,10E,14E,18E,22E)-3,7,11,15,19,23,27-HEPTAMETHYLOCTACOSA-2,6,10,14,18,22,26-HEPTAENYL]-2,3-DIMETHYLBENZO-1,4-QUINONE'>PQ9</scene>, <scene name='pdbligand=SQD:1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL'>SQD</scene></td></tr>
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{{STRUCTURE_2axt| PDB=2axt | 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=2axt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2axt OCA], [https://pdbe.org/2axt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2axt RCSB], [https://www.ebi.ac.uk/pdbsum/2axt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2axt ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PSBA1_THEVB PSBA1_THEVB] Photosystem II (PSII) is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. The D1/D2 (PsbA/PsbD) reaction center heterodimer binds P680, the primary electron donor of PSII as well as several subsequent electron acceptors.[HAMAP-Rule:MF_01379]<ref>PMID:20558739</ref> <ref>PMID:21367867</ref> <ref>PMID:25006873</ref>
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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/ax/2axt_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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/main_output.php?pdb_ID=2axt 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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Oxygenic photosynthesis in plants, algae and cyanobacteria is initiated at photosystem II, a homodimeric multisubunit protein-cofactor complex embedded in the thylakoid membrane. Photosystem II captures sunlight and powers the unique photo-induced oxidation of water to atmospheric oxygen. Crystallographic investigations of cyanobacterial photosystem II have provided several medium-resolution structures (3.8 to 3.2 A) that explain the general arrangement of the protein matrix and cofactors, but do not give a full picture of the complex. Here we describe the most complete cyanobacterial photosystem II structure obtained so far, showing locations of and interactions between 20 protein subunits and 77 cofactors per monomer. Assignment of 11 beta-carotenes yields insights into electron and energy transfer and photo-protection mechanisms in the reaction centre and antenna subunits. The high number of 14 integrally bound lipids reflects the structural and functional importance of these molecules for flexibility within and assembly of photosystem II. A lipophilic pathway is proposed for the diffusion of secondary plastoquinone that transfers redox equivalents from photosystem II to the photosynthetic chain. The structure provides information about the Mn4Ca cluster, where oxidation of water takes place. Our study uncovers near-atomic details necessary to understand the processes that convert light to chemical energy.
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===Crystal Structure of Photosystem II from Thermosynechococcus elongatus===
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Towards complete cofactor arrangement in the 3.0 A resolution structure of photosystem II.,Loll B, Kern J, Saenger W, Zouni A, Biesiadka J Nature. 2005 Dec 15;438(7070):1040-4. PMID:16355230<ref>PMID:16355230</ref>
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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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<div class="pdbe-citations 2axt" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_16355230}}, adds the Publication Abstract to the page
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*[[Cytochrome C 3D structures|Cytochrome C 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 16355230 is the PubMed ID number.
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*[[Photosystem II|Photosystem II]]
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*[[Photosystem II 3D structures|Photosystem II 3D structures]]
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{{ABSTRACT_PUBMED_16355230}}
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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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2AXT is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Bacteria Bacteria] and [http://en.wikipedia.org/wiki/Thermosynechococcus_elongatus Thermosynechococcus elongatus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AXT OCA].
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</StructureSection>
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[[Category: Large Structures]]
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==Reference==
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[[Category: Thermosynechococcus vestitus]]
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Towards complete cofactor arrangement in the 3.0 A resolution structure of photosystem II., Loll B, Kern J, Saenger W, Zouni A, Biesiadka J, Nature. 2005 Dec 15;438(7070):1040-4. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16355230 16355230]
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[[Category: Thermosynechococcus vestitus BP-1]]
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[[Category: Bacteria]]
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[[Category: Biesiadka J]]
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[[Category: Protein complex]]
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[[Category: Kern J]]
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[[Category: Thermosynechococcus elongatus]]
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[[Category: Loll B]]
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[[Category: Pdbx_ordinal=, <PDBx:audit_author.]]
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[[Category: Saenger W]]
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[[Category: Electron transport]]
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[[Category: Zouni A]]
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[[Category: Membrane complex]]
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[[Category: Photosystem]]
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[[Category: Ps ii]]
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[[Category: Ps2]]
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[[Category: Transmembrane alpha-helix]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Feb 11 20:04:16 2009''
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Current revision

Crystal Structure of Photosystem II from Thermosynechococcus elongatus

PDB ID 2axt

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