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| | ==Structure of PSI-LHCI== | | ==Structure of PSI-LHCI== |
| - | <StructureSection load='6igz' size='340' side='right'caption='[[6igz]], [[Resolution|resolution]] 3.49Å' scene=''> | + | <SX load='6igz' size='340' side='right' viewer='molstar' caption='[[6igz]], [[Resolution|resolution]] 3.49Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6igz]] is a 22 chain structure with sequence from [http://en.wikipedia.org/wiki/Bryopsis_corticulans Bryopsis corticulans], [http://en.wikipedia.org/wiki/Bryopsis_plumosa Bryopsis plumosa] and [http://en.wikipedia.org/wiki/Spinacia_oleracea Spinacia oleracea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6IGZ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6IGZ FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6igz]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Bryopsis_corticulans Bryopsis corticulans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6IGZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6IGZ FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=8CT:(6R,11cis,11cis,13cis,15cis)-4,5-didehydro-5,6-dihydro-beta,beta-carotene'>8CT</scene>, <scene name='pdbligand=CHL:CHLOROPHYLL+B'>CHL</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=DGD:DIGALACTOSYL+DIACYL+GLYCEROL+(DGDG)'>DGD</scene>, <scene name='pdbligand=HTG:HEPTYL+1-THIOHEXOPYRANOSIDE'>HTG</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=PQN:PHYLLOQUINONE'>PQN</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=XAT:(3S,5R,6S,3S,5R,6S)-5,6,5,6-DIEPOXY-5,6,5,6-+TETRAHYDRO-BETA,BETA-CAROTENE-3,3-DIOL'>XAT</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.49Å</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=6igz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6igz OCA], [http://pdbe.org/6igz PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6igz RCSB], [http://www.ebi.ac.uk/pdbsum/6igz PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6igz ProSAT]</span></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=8CT:1,3,3-trimethyl-2-[(1~{E},3~{E},5~{Z},7~{Z},9~{Z},11~{E},13~{Z},15~{E},17~{E})-3,7,12,16-tetramethyl-18-[(1~{R})-2,6,6-trimethylcyclohex-2-en-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohexene'>8CT</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=DGD:DIGALACTOSYL+DIACYL+GLYCEROL+(DGDG)'>DGD</scene>, <scene name='pdbligand=HTG:HEPTYL+1-THIOHEXOPYRANOSIDE'>HTG</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=PQN:PHYLLOQUINONE'>PQN</scene>, <scene name='pdbligand=XAT:(3S,5R,6S,3S,5R,6S)-5,6,5,6-DIEPOXY-5,6,5,6-+TETRAHYDRO-BETA,BETA-CAROTENE-3,3-DIOL'>XAT</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=6igz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6igz OCA], [https://pdbe.org/6igz PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6igz RCSB], [https://www.ebi.ac.uk/pdbsum/6igz PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6igz ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/A0A4V8H005_9CHLO A0A4V8H005_9CHLO] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 6igz" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 6igz" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Photosystem I 3D structures|Photosystem I 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| - | </StructureSection> | + | </SX> |
| | [[Category: Bryopsis corticulans]] | | [[Category: Bryopsis corticulans]] |
| - | [[Category: Bryopsis plumosa]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Spinacia oleracea]]
| + | [[Category: Xiaochun Q]] |
| - | [[Category: Xiaochun, Q]] | + | [[Category: Xiong P]] |
| - | [[Category: Xiong, P]] | + | |
| - | [[Category: Plant protein]]
| + | |
| - | [[Category: Psi-lhci]]
| + | |
| Structural highlights
Function
A0A4V8H005_9CHLO
Publication Abstract from PubMed
Photosystem I (PSI) is a highly efficient natural light-energy converter, and has diverse light-harvesting antennas associated with its core in different photosynthetic organisms. In green algae, an extremely large light-harvesting complex I (LHCI) captures and transfers energy to the PSI core. Here, we report the structure of PSI-LHCI from a green alga Bryopsis corticulans at 3.49 A resolution, obtained by single-particle cryo-electron microscopy, which revealed 13 core subunits including subunits characteristic of both prokaryotes and eukaryotes, and 10 light-harvesting complex a (Lhca) antennas that form a double semi-ring and an additional Lhca dimer, including a novel four-transmembrane-helix Lhca. In total, 244 chlorophylls were identified, some of which were located at key positions for the fast energy transfer. These results provide a firm structural basis for unravelling the mechanisms of light-energy harvesting, transfer and quenching in the green algal PSI-LHCI, and important clues as to how PSI-LHCI has changed during evolution.
Structure of a green algal photosystem I in complex with a large number of light-harvesting complex I subunits.,Qin X, Pi X, Wang W, Han G, Zhu L, Liu M, Cheng L, Shen JR, Kuang T, Sui SF Nat Plants. 2019 Mar;5(3):263-272. doi: 10.1038/s41477-019-0379-y. Epub 2019 Mar , 8. PMID:30850820[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Qin X, Pi X, Wang W, Han G, Zhu L, Liu M, Cheng L, Shen JR, Kuang T, Sui SF. Structure of a green algal photosystem I in complex with a large number of light-harvesting complex I subunits. Nat Plants. 2019 Mar;5(3):263-272. doi: 10.1038/s41477-019-0379-y. Epub 2019 Mar , 8. PMID:30850820 doi:http://dx.doi.org/10.1038/s41477-019-0379-y
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