View source for 6rhz


==Structure of a minimal photosystem I from a green alga==
<SX load='6rhz' size='340' side='right' viewer='molstar' caption='[[6rhz]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6rhz]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Dunaliella_salina Dunaliella salina]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6RHZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6RHZ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.2&#8491;</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=6rhz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6rhz OCA], [https://pdbe.org/6rhz PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6rhz RCSB], [https://www.ebi.ac.uk/pdbsum/6rhz PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6rhz ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/C1K003_DUNSA C1K003_DUNSA] The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated.[RuleBase:RU363080]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Solar energy harnessed by oxygenic photosynthesis supports most of the life forms on Earth. In eukaryotes, photosynthesis occurs in chloroplasts and is achieved by membrane-embedded macromolecular complexes that contain core and peripheral antennae with multiple pigments. The structure of photosystem I (PSI) comprises the core and light-harvesting (LHCI) complexes, which together form PSI-LHCI. Here we determined the structure of PSI-LHCI from the salt-tolerant green alga Dunaliella salina using X-ray crystallography and electron cryo-microscopy. Our results reveal a previously undescribed configuration of the PSI core. It is composed of only 7 subunits, compared with 14-16 subunits in plants and the alga Chlamydomonas reinhardtii, and forms the smallest known PSI. The LHCI is poorly conserved at the sequence level and binds to pigments that form new energy pathways, and the interactions between the individual Lhca1-4 proteins are weakened. Overall, the data indicate the PSI of D. salina represents a different type of the molecular organization that provides important information for reconstructing the plasticity and evolution of PSI.

Structure of a minimal photosystem I from the green alga Dunaliella salina.,Perez-Boerema A, Klaiman D, Caspy I, Netzer-El SY, Amunts A, Nelson N Nat Plants. 2020 Mar;6(3):321-327. doi: 10.1038/s41477-020-0611-9. Epub 2020 Mar , 2. PMID:32123351<ref>PMID:32123351</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 6rhz" style="background-color:#fffaf0;"></div>

==See Also==
*[[Photosystem I 3D structures|Photosystem I 3D structures]]
== References ==
<references/>
__TOC__
</SX>
[[Category: Dunaliella salina]]
[[Category: Large Structures]]
[[Category: Amunts A]]
[[Category: Caspy I]]
[[Category: Klaiman D]]
[[Category: Nelson N]]
[[Category: Netzer-El SY]]
[[Category: Perez Boerema A]]