7y4l

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Current revision (05:59, 17 September 2025) (edit) (undo)
 
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==PBS of PBS-PSII-PSI-LHCs from Porphyridium purpureum.==
==PBS of PBS-PSII-PSI-LHCs from Porphyridium purpureum.==
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<StructureSection load='7y4l' size='340' side='right'caption='[[7y4l]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
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<SX load='7y4l' size='340' side='right' viewer='molstar' caption='[[7y4l]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[7y4l]] is a 630 chain structure with sequence from [https://en.wikipedia.org/wiki/Porphyridium_purpureum Porphyridium purpureum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7Y4L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7Y4L FirstGlance]. <br>
<table><tr><td colspan='2'>[[7y4l]] is a 630 chain structure with sequence from [https://en.wikipedia.org/wiki/Porphyridium_purpureum Porphyridium purpureum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7Y4L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7Y4L FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CYC:PHYCOCYANOBILIN'>CYC</scene>, <scene name='pdbligand=MEN:N-METHYL+ASPARAGINE'>MEN</scene>, <scene name='pdbligand=PEB:PHYCOERYTHROBILIN'>PEB</scene>, <scene name='pdbligand=PUB:PHYCOUROBILIN'>PUB</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.3&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CYC:PHYCOCYANOBILIN'>CYC</scene>, <scene name='pdbligand=MEN:N-METHYL+ASPARAGINE'>MEN</scene>, <scene name='pdbligand=PEB:PHYCOERYTHROBILIN'>PEB</scene>, <scene name='pdbligand=PUB:PHYCOUROBILIN'>PUB</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=7y4l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7y4l OCA], [https://pdbe.org/7y4l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7y4l RCSB], [https://www.ebi.ac.uk/pdbsum/7y4l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7y4l ProSAT]</span></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=7y4l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7y4l OCA], [https://pdbe.org/7y4l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7y4l RCSB], [https://www.ebi.ac.uk/pdbsum/7y4l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7y4l ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[https://www.uniprot.org/uniprot/A0A5J4YXP2_PORPP A0A5J4YXP2_PORPP]
[https://www.uniprot.org/uniprot/A0A5J4YXP2_PORPP A0A5J4YXP2_PORPP]
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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In oxygenic photosynthetic organisms, light energy is captured by antenna systems and transferred to photosystem II (PSII) and photosystem I (PSI) to drive photosynthesis(1,2). The antenna systems of red algae consist of soluble phycobilisomes (PBSs) and transmembrane light-harvesting complexes (LHCs)(3). Excitation energy transfer pathways from PBS to photosystems remain unclear owing to the lack of structural information. Here we present in situ structures of PBS-PSII-PSI-LHC megacomplexes from the red alga Porphyridium purpureum at near-atomic resolution using cryogenic electron tomography and in situ single-particle analysis(4), providing interaction details between PBS, PSII and PSI. The structures reveal several unidentified and incomplete proteins and their roles in the assembly of the megacomplex, as well as a huge and sophisticated pigment network. This work provides a solid structural basis for unravelling the mechanisms of PBS-PSII-PSI-LHC megacomplex assembly, efficient energy transfer from PBS to the two photosystems, and regulation of energy distribution between PSII and PSI.
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In situ structure of the red algal phycobilisome-PSII-PSI-LHC megacomplex.,You X, Zhang X, Cheng J, Xiao Y, Ma J, Sun S, Zhang X, Wang HW, Sui SF Nature. 2023 Apr;616(7955):199-206. doi: 10.1038/s41586-023-05831-0. Epub 2023 , Mar 15. PMID:36922595<ref>PMID:36922595</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 7y4l" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
__TOC__
__TOC__
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</StructureSection>
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</SX>
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Porphyridium purpureum]]
[[Category: Porphyridium purpureum]]

Current revision

PBS of PBS-PSII-PSI-LHCs from Porphyridium purpureum.

7y4l, resolution 3.30Å

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