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| | ==Crystal Structure of cyanobacterial Photosystem II== | | ==Crystal Structure of cyanobacterial Photosystem II== |
| - | <StructureSection load='4v62' size='340' side='right' caption='[[4v62]], [[Resolution|resolution]] 2.90Å' scene=''> | + | <StructureSection load='4v62' size='340' side='right'caption='[[4v62]], [[Resolution|resolution]] 2.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4v62]] is a 40 chain structure with sequence from [http://en.wikipedia.org/wiki/Thermosynechococcus_elongatus Thermosynechococcus elongatus]. This structure supersedes and combines the now removed PDB entries [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3bz1 3bz1] and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3bz2 3bz2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4V62 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4V62 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4v62]] is a 20 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermosynechococcus_vestitus_BP-1 Thermosynechococcus vestitus BP-1]. This structure supersedes the now removed PDB entries [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3bz1 3bz1] and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3bz2 3bz2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4V62 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4V62 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><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=CL:CHLORIDE+ION'>CL</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=LMG:1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE'>LMG</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=OEC:OXYGEN+EVOLVING+SYSTEM'>OEC</scene>, <scene name='pdbligand=PHO:PHEOPHYTIN+A'>PHO</scene>, <scene name='pdbligand=PL9:2,3-DIMETHYL-5-(3,7,11,15,19,23,27,31,35-NONAMETHYL-2,6,10,14,18,22,26,30,34-HEXATRIACONTANONAENYL-2,5-CYCLOHEXADIENE-1,4-DIONE-2,3-DIMETHYL-5-SOLANESYL-1,4-BENZOQUINONE'>PL9</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> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9Å</td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=UNK:UNKNOWN'>UNK</scene></td></tr>
| + | <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=CL:CHLORIDE+ION'>CL</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=LMG:1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE'>LMG</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=OEC:OXYGEN+EVOLVING+SYSTEM'>OEC</scene>, <scene name='pdbligand=PHO:PHEOPHYTIN+A'>PHO</scene>, <scene name='pdbligand=PL9:2,3-DIMETHYL-5-(3,7,11,15,19,23,27,31,35-NONAMETHYL-2,6,10,14,18,22,26,30,34-HEXATRIACONTANONAENYL-2,5-CYCLOHEXADIENE-1,4-DIONE-2,3-DIMETHYL-5-SOLANESYL-1,4-BENZOQUINONE'>PL9</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> |
| - | <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=4v62 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4v62 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4v62 RCSB], [http://www.ebi.ac.uk/pdbsum/4v62 PDBsum]</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=4v62 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4v62 OCA], [https://pdbe.org/4v62 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4v62 RCSB], [https://www.ebi.ac.uk/pdbsum/4v62 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4v62 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| - | {{Large structure}} | |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/PSBL_THEEB PSBL_THEEB]] Required for PSII activity (By similarity). [[http://www.uniprot.org/uniprot/PSBB_THEEB PSBB_THEEB]] One of the components of the core complex of photosystem II (PSII). It binds chlorophyll and helps catalyze the primary light-induced photochemical processes of PSII. PSII is a light-driven water:plastoquinone oxidoreductase, using light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation.[HAMAP-Rule:MF_01495]<ref>PMID:20558739</ref> <ref>PMID:21367867</ref> <ref>PMID:25006873</ref> [[http://www.uniprot.org/uniprot/YCF12_THEEB YCF12_THEEB]] A core subunit of photosystem II (PSII).[HAMAP-Rule:MF_01329] [[http://www.uniprot.org/uniprot/PSBA1_SYNEL PSBA1_SYNEL]] This is one of the two reaction center proteins of photosystem II (By similarity). [[http://www.uniprot.org/uniprot/CY550_THEEB CY550_THEEB]] Low-potential cytochrome c that plays a role in the oxygen-evolving complex of photosystem II. It is not essential for growth under normal conditions but is required under low CO(2) concentrations.[HAMAP-Rule:MF_01378] [[http://www.uniprot.org/uniprot/PSBF_THEEB PSBF_THEEB]] This b-type cytochrome is tightly associated with the reaction center of photosystem II and possibly is part of the water-oxidation complex (By similarity).[HAMAP-Rule:MF_00643] [[http://www.uniprot.org/uniprot/PSBC_THEEB PSBC_THEEB]] One of the components of the core complex of photosystem II (PSII). It binds chlorophyll and helps catalyze the primary light-induced photochemical processes of PSII. PSII is a light-driven water:plastoquinone oxidoreductase, using light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation.[HAMAP-Rule:MF_01496]<ref>PMID:20558739</ref> <ref>PMID:21367867</ref> <ref>PMID:25006873</ref> [[http://www.uniprot.org/uniprot/PSBJ_THEEB PSBJ_THEEB]] This protein is a component of the reaction center of photosystem II (By similarity). [[http://www.uniprot.org/uniprot/PSBT_THEEB PSBT_THEEB]] Seems to play a role in the dimerization of PSII.<ref>PMID:15653799</ref> [[http://www.uniprot.org/uniprot/PSBU_THEEB PSBU_THEEB]] Stabilizes the structure of photosystem II oxygen-evolving complex (OEC), the ion environment of oxygen evolution and protects the OEC against heat-induced inactivation (By similarity).[HAMAP-Rule:MF_00589] [[http://www.uniprot.org/uniprot/PSBZ_THEEB PSBZ_THEEB]] Controls the interaction of photosystem II (PSII) cores with the light-harvesting antenna. May also aid in binding of PsbK, Ycf12 and the oxygen-evolving complex to PSII, at least in vitro.<ref>PMID:17967798</ref> [[http://www.uniprot.org/uniprot/PSBI_THEEB PSBI_THEEB]] This protein is a component of the reaction center of photosystem II.[HAMAP-Rule:MF_01316] [[http://www.uniprot.org/uniprot/PSBK_THEEB PSBK_THEEB]] This protein is a component of the reaction center of photosystem II.[HAMAP-Rule:MF_00441] [[http://www.uniprot.org/uniprot/PSBE_THEEB PSBE_THEEB]] This b-type cytochrome is tightly associated with the reaction center of photosystem II and possibly is part of the water-oxidation complex.[HAMAP-Rule:MF_00642] | + | [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/PsbA) 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> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 4v62" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Cytochrome C 3D structures|Cytochrome C 3D structures]] |
| | + | *[[Photosystem II 3D structures|Photosystem II 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Thermosynechococcus elongatus]] | + | [[Category: Large Structures]] |
| - | [[Category: Broser, M]] | + | [[Category: Thermosynechococcus vestitus BP-1]] |
| - | [[Category: Gabdulkhakov, A]] | + | [[Category: Broser M]] |
| - | [[Category: Guskov, A]] | + | [[Category: Gabdulkhakov A]] |
| - | [[Category: Kern, J]] | + | [[Category: Guskov A]] |
| - | [[Category: Saenger, W]] | + | [[Category: Kern J]] |
| - | [[Category: Zouni, A]] | + | [[Category: Saenger W]] |
| - | [[Category: Electron transport]]
| + | [[Category: Zouni A]] |
| - | [[Category: Electron transport photosystem]]
| + | |
| - | [[Category: Heme]]
| + | |
| - | [[Category: Herbicide resistance]]
| + | |
| - | [[Category: Iron]]
| + | |
| - | [[Category: Manganese]]
| + | |
| - | [[Category: Membrane complex]]
| + | |
| - | [[Category: Metal-binding]]
| + | |
| - | [[Category: Photosynthesis]]
| + | |
| - | [[Category: Photosystem ii]]
| + | |
| - | [[Category: Ps ii]]
| + | |
| - | [[Category: Ps2]]
| + | |
| - | [[Category: Reaction center]]
| + | |
| - | [[Category: Thylakoid]]
| + | |
| - | [[Category: Transmembrane alpha-helix]]
| + | |
| Structural highlights
4v62 is a 20 chain structure with sequence from Thermosynechococcus vestitus BP-1. This structure supersedes the now removed PDB entries 3bz1 and 3bz2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Method: | X-ray diffraction, Resolution 2.9Å |
| Ligands: | , , , , , , , , , , , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
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/PsbA) reaction center heterodimer binds P680, the primary electron donor of PSII as well as several subsequent electron acceptors.[HAMAP-Rule:MF_01379][1] [2] [3]
Publication Abstract from PubMed
Photosystem II (PSII) is a large homodimeric protein-cofactor complex located in the photosynthetic thylakoid membrane that acts as light-driven water:plastoquinone oxidoreductase. The crystal structure of PSII from Thermosynechococcus elongatus at 2.9-A resolution allowed the unambiguous assignment of all 20 protein subunits and complete modeling of all 35 chlorophyll a molecules and 12 carotenoid molecules, 25 integral lipids and 1 chloride ion per monomer. The presence of a third plastoquinone Q(C) and a second plastoquinone-transfer channel, which were not observed before, suggests mechanisms for plastoquinol-plastoquinone exchange, and we calculated other possible water or dioxygen and proton channels. Putative oxygen positions obtained from a Xenon derivative indicate a role for lipids in oxygen diffusion to the cytoplasmic side of PSII. The chloride position suggests a role in proton-transfer reactions because it is bound through a putative water molecule to the Mn(4)Ca cluster at a distance of 6.5 A and is close to two possible proton channels.
Cyanobacterial photosystem II at 2.9-A resolution and the role of quinones, lipids, channels and chloride.,Guskov A, Kern J, Gabdulkhakov A, Broser M, Zouni A, Saenger W Nat Struct Mol Biol. 2009 Mar;16(3):334-42. Epub 2009 Feb 15. PMID:19219048[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Broser M, Gabdulkhakov A, Kern J, Guskov A, Muh F, Saenger W, Zouni A. Crystal structure of monomeric photosystem II from Thermosynechococcus elongatus at 3.6-a resolution. J Biol Chem. 2010 Aug 20;285(34):26255-62. Epub 2010 Jun 17. PMID:20558739 doi:10.1074/jbc.M110.127589
- ↑ Broser M, Glockner C, Gabdulkhakov A, Guskov A, Buchta J, Kern J, Muh F, Dau H, Saenger W, Zouni A. Structural basis of cyanobacterial photosystem II Inhibition by the herbicide terbutryn. J Biol Chem. 2011 May 6;286(18):15964-72. Epub 2011 Mar 2. PMID:21367867 doi:http://dx.doi.org/10.1074/jbc.M110.215970
- ↑ Kern J, Tran R, Alonso-Mori R, Koroidov S, Echols N, Hattne J, Ibrahim M, Gul S, Laksmono H, Sierra RG, Gildea RJ, Han G, Hellmich J, Lassalle-Kaiser B, Chatterjee R, Brewster AS, Stan CA, Glockner C, Lampe A, DiFiore D, Milathianaki D, Fry AR, Seibert MM, Koglin JE, Gallo E, Uhlig J, Sokaras D, Weng TC, Zwart PH, Skinner DE, Bogan MJ, Messerschmidt M, Glatzel P, Williams GJ, Boutet S, Adams PD, Zouni A, Messinger J, Sauter NK, Bergmann U, Yano J, Yachandra VK. Taking snapshots of photosynthetic water oxidation using femtosecond X-ray diffraction and spectroscopy. Nat Commun. 2014 Jul 9;5:4371. doi: 10.1038/ncomms5371. PMID:25006873 doi:http://dx.doi.org/10.1038/ncomms5371
- ↑ Guskov A, Kern J, Gabdulkhakov A, Broser M, Zouni A, Saenger W. Cyanobacterial photosystem II at 2.9-A resolution and the role of quinones, lipids, channels and chloride. Nat Struct Mol Biol. 2009 Mar;16(3):334-42. Epub 2009 Feb 15. PMID:19219048 doi:10.1038/nsmb.1559
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