6igz: Difference between revisions
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==Structure of PSI-LHCI== | ==Structure of PSI-LHCI== | ||
< | <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 | <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 | </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'>[ | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=8CT:(6R,11cis,11cis,13cis,15cis)-4,5-didehydro-5,6-dihydro-beta,beta-carotene'>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;"> | |||
== 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<ref>PMID:30850820</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 6igz" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Photosystem I 3D structures|Photosystem I 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</ | </SX> | ||
[[Category: Bryopsis corticulans]] | [[Category: Bryopsis corticulans]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Xiaochun Q]] | |||
[[Category: Xiaochun | [[Category: Xiong P]] | ||
[[Category: Xiong | |||
Latest revision as of 13:16, 13 August 2026
Structure of PSI-LHCI
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