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New page: '''Unreleased structure''' The entry 8wck is ON HOLD Authors: Feng, Y., Li, Z., Zhou, C., Shen, J.-R., Liu, C., Wang, W. Description: FCP tetramer in Chaetoceros gracilis [[Category: U...
 
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'''Unreleased structure'''


The entry 8wck is ON HOLD
==FCP tetramer in Chaetoceros gracilis==
<StructureSection load='8wck' size='340' side='right'caption='[[8wck]], [[Resolution|resolution]] 2.71&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8wck]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Chaetoceros_neogracilis Chaetoceros neogracilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8WCK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8WCK 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]] 2.71&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=A86:(3S,3S,5R,5R,6S,6R,8R)-3,5-dihydroxy-8-oxo-6,7-didehydro-5,5,6,6,7,8-hexahydro-5,6-epoxy-beta,beta-caroten-3-+yl+acetate'>A86</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=KC1:Chlorophyll+c1'>KC1</scene>, <scene name='pdbligand=KC2:Chlorophyll+c2'>KC2</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</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=8wck FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8wck OCA], [https://pdbe.org/8wck PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8wck RCSB], [https://www.ebi.ac.uk/pdbsum/8wck PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8wck ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A679BXP6_9STRA A0A679BXP6_9STRA] The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated. Energy is transferred from the carotenoid and chlorophyll C (or B) to chlorophyll A and the photosynthetic reaction centers where it is used to synthesize ATP and reducing power.[ARBA:ARBA00004022]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Diatoms, a group of prevalent marine algae, significantly contribute to global primary productivity. Their substantial biomass is linked to enhanced absorption of blue-green light underwater, facilitated by fucoxanthin chlorophyll a/c-binding proteins (FCPs), exhibiting oligomeric diversity across diatom species. Utilizing mild CN-PAGE analysis on solubilized thylakoid membranes, we displayed monomeric, dimeric, trimeric, tetrameric and pentameric FCPs in diatoms. Mass spectrometry analysis revealed each oligomeric FCP has specific protein compositions, constituting a large Lhcf family of FCP antennas. In addition, we resolved the structures of Thalassiosira pseudonana FCP (Tp-FCP) homotrimer and Chaetoceros gracilis FCP (Cg-FCP) pentamer by cryo-electron microscopy at 2.73 A and 2.65 A resolutions, respectively. The distinct pigment composition and organization in various oligomeric FCPs change their blue-green light-harvesting, excitation energy transfer pathways. In comparison to dimeric and trimeric FCPs, Cg-FCP tetramer and Cg-FCP pentamer exhibit stronger absorption by Chls c, red-shifted and broader Chl a fluorescence emission, as well as more robust circular dichroism signals originating from Chl a-carotenoid dimers. These spectroscopic characteristics indicate that Chl a molecules in Cg-FCP tetramer and Cg-FCP pentamer are more heterogeneous than in both dimers and Tp-FCP trimer. The structural and spectroscopic insights provided by this study contribute to a better understanding of the mechanisms that empower diatoms to adapt to fluctuating light environments.


Authors: Feng, Y., Li, Z., Zhou, C., Shen, J.-R., Liu, C., Wang, W.
Structural and spectroscopic insights into fucoxanthin chlorophyll a/c-binding proteins of diatoms in diverse oligomeric states.,Zhou C, Feng Y, Li Z, Shen L, Li X, Wang Y, Han G, Kuang T, Liu C, Shen JR, Wang W Plant Commun. 2024 Jul 17:101041. doi: 10.1016/j.xplc.2024.101041. PMID:39030906<ref>PMID:39030906</ref>


Description: FCP tetramer in Chaetoceros gracilis
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[Category: Unreleased Structures]]
</div>
[[Category: Shen, J.-R]]
<div class="pdbe-citations 8wck" style="background-color:#fffaf0;"></div>
[[Category: Wang, W]]
== References ==
[[Category: Liu, C]]
<references/>
[[Category: Li, Z]]
__TOC__
[[Category: Zhou, C]]
</StructureSection>
[[Category: Feng, Y]]
[[Category: Chaetoceros neogracilis]]
[[Category: Large Structures]]
[[Category: Feng Y]]
[[Category: Li Z]]
[[Category: Liu C]]
[[Category: Shen J-R]]
[[Category: Wang W]]
[[Category: Zhou C]]
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