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==== | ==Barley photosystem I-LHCI-Lhca5 supercomplex== | ||
<StructureSection load='7ew6' size='340' side='right'caption='[[7ew6]]' scene=''> | <StructureSection load='7ew6' size='340' side='right'caption='[[7ew6]], [[Resolution|resolution]] 3.40Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id= OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol= FirstGlance]. <br> | <table><tr><td colspan='2'>[[7ew6]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Hordeum_vulgare_subsp._spontaneum Hordeum vulgare subsp. spontaneum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7EW6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7EW6 FirstGlance]. <br> | ||
</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=7ew6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ew6 OCA], [https://pdbe.org/7ew6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ew6 RCSB], [https://www.ebi.ac.uk/pdbsum/7ew6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ew6 ProSAT]</span></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]] 3.4Å</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=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=DGD:DIGALACTOSYL+DIACYL+GLYCEROL+(DGDG)'>DGD</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=LUT:(3R,3R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3-DIOL'>LUT</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=7ew6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ew6 OCA], [https://pdbe.org/7ew6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ew6 RCSB], [https://www.ebi.ac.uk/pdbsum/7ew6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ew6 ProSAT]</span></td></tr> | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/PSAA_HORVU PSAA_HORVU] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin. | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The chloroplast NADH dehydrogenase-like (NDH) complex is composed of at least 29 subunits and has an important role in mediating photosystem I (PSI) cyclic electron transport (CET)(1-3). The NDH complex associates with PSI to form the PSI-NDH supercomplex and fulfil its function. Here, we report cryo-electron microscopy structures of a PSI-NDH supercomplex from barley (Hordeum vulgare). The structures reveal that PSI-NDH is composed of two copies of the PSI-light-harvesting complex I (LHCI) subcomplex and one NDH complex. Two monomeric LHCI proteins, Lhca5 and Lhca6, mediate the binding of two PSI complexes to NDH. Ten plant chloroplast-specific NDH subunits are presented and their exact positions as well as their interactions with other subunits in NDH are elucidated. In all, this study provides a structural basis for further investigations on the functions and regulation of PSI-NDH-dependent CET. | |||
Architecture of the chloroplast PSI-NDH supercomplex in Hordeum vulgare.,Shen L, Tang K, Wang W, Wang C, Wu H, Mao Z, An S, Chang S, Kuang T, Shen JR, Han G, Zhang X Nature. 2022 Jan;601(7894):649-654. doi: 10.1038/s41586-021-04277-6. Epub 2021 , Dec 8. PMID:34879391<ref>PMID:34879391</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 7ew6" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Photosystem I 3D structures|Photosystem I 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Hordeum vulgare subsp. spontaneum]] | |||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: | [[Category: Han GY]] | ||
[[Category: Shen JR]] | |||
[[Category: Shen L]] | |||
[[Category: Tang K]] | |||
[[Category: Wang WD]] | |||
[[Category: Zhang X]] | |||
Latest revision as of 14:14, 13 August 2026
Barley photosystem I-LHCI-Lhca5 supercomplex
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