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6j3y
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| - | '''Unreleased structure''' | ||
| - | + | ==Structure of C2S2-type PSII-FCPII supercomplex from diatom== | |
| + | <SX load='6j3y' size='340' side='right' viewer='molstar' caption='[[6j3y]], [[Resolution|resolution]] 3.30Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[6j3y]] is a 56 chain structure with sequence from [http://en.wikipedia.org/wiki/Chaetoceros_gracilis Chaetoceros gracilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6J3Y OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6J3Y FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=A86:(3S,3S,5R,5R,6S,6R,8R)-3,5-dihydroxy-8-oxo-6,7-didehydro-5,5,6,6,7,8-hexahydro-5,6-epoxy-beta,beta-caroten-3-yl+acetate'>A86</scene>, <scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=BCT:BICARBONATE+ION'>BCT</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=LMU:DODECYL-ALPHA-D-MALTOSIDE'>LMU</scene>, <scene name='pdbligand=OEX:CA-MN4-O5+CLUSTER'>OEX</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='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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6j3y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6j3y OCA], [http://pdbe.org/6j3y PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6j3y RCSB], [http://www.ebi.ac.uk/pdbsum/6j3y PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6j3y ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/B7XBY7_9STRA B7XBY7_9STRA]] One of the components of the core complex of photosystem II (PSII), required for its stability and/or assembly. 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.[HAMAP-Rule:MF_00752] [[http://www.uniprot.org/uniprot/B6ZHF2_9STRA B6ZHF2_9STRA]] Involved in the binding and/or turnover of quinones at the Q(B) site of Photosystem II.[HAMAP-Rule:MF_01386] [[http://www.uniprot.org/uniprot/B6ZHF4_9STRA B6ZHF4_9STRA]] Low-potential cytochrome c that plays a role in the oxygen-evolving complex of photosystem II.[HAMAP-Rule:MF_01378] | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Light-harvesting antenna systems in photosynthetic organisms harvest solar energy and transfer it to the photosynthetic reaction centres to initiate charge-separation and electron-transfer reactions. Diatoms are one of the important groups of oxyphototrophs and possess fucoxanthin chlorophyll a/c-binding proteins (FCPs) as light harvesters. The organization and association pattern of FCP with the photosystem II (PSII) core are unknown. Here we solved the structure of PSII-FCPII supercomplexes isolated from a diatom, Chaetoceros gracilis, by single-particle cryoelectron microscopy. The PSII-FCPII forms a homodimer. In each monomer, two FCP homotetramers and three FCP monomers are associated with one PSII core. The structure reveals a highly complicated protein-pigment network that is different from the green-type light-harvesting apparatus. Comparing these two systems allows the identification of energy transfer and quenching pathways. These findings provide structural insights into not only excitation-energy transfer mechanisms in the diatom PSII-FCPII, but also changes of light harvesters between the red- and green-lineage oxyphototrophs during evolution. | ||
| - | + | Structural basis for energy harvesting and dissipation in a diatom PSII-FCPII supercomplex.,Nagao R, Kato K, Suzuki T, Ifuku K, Uchiyama I, Kashino Y, Dohmae N, Akimoto S, Shen JR, Miyazaki N, Akita F Nat Plants. 2019 Aug;5(8):890-901. doi: 10.1038/s41477-019-0477-x. Epub 2019 Jul , 29. PMID:31358960<ref>PMID:31358960</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 6j3y" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </SX> | ||
| + | [[Category: Chaetoceros gracilis]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Akita, F]] | ||
| + | [[Category: Kato, K]] | ||
| + | [[Category: Miyazaki, N]] | ||
| + | [[Category: Nagao, R]] | ||
| + | [[Category: Shen, J R]] | ||
| + | [[Category: Electron transport]] | ||
| + | [[Category: Photosystem]] | ||
Current revision
Structure of C2S2-type PSII-FCPII supercomplex from diatom
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