View source for 5yq7


==Cryo-EM structure of the RC-LH core complex from Roseiflexus castenholzii==
<SX load='5yq7' size='340' side='right' viewer='molstar' caption='[[5yq7]], [[Resolution|resolution]] 4.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5yq7]] is a 35 chain structure with sequence from [https://en.wikipedia.org/wiki/Roseiflexus_castenholzii Roseiflexus castenholzii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5YQ7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5YQ7 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]] 4.1&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BPH:BACTERIOPHEOPHYTIN+A'>BPH</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=KGD:beta,psi-caroten-4-one'>KGD</scene>, <scene name='pdbligand=MQE:2-methyl-3-[(2E,6E,10E,14E,18E,22E,26E,30E,34E,38E)-3,7,11,15,19,23,27,31,35,39,43-undecamethyltetratetraconta-2,6,10,14,18,22,26,30,34,38,42-undecaen-1-yl]naphthalene-1,4-dione'>MQE</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=5yq7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5yq7 OCA], [https://pdbe.org/5yq7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5yq7 RCSB], [https://www.ebi.ac.uk/pdbsum/5yq7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5yq7 ProSAT]</span></td></tr>
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== Function ==
[https://www.uniprot.org/uniprot/Q83XD2_9CHLR Q83XD2_9CHLR] Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers.[SAAS:SAAS00885981]
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== Publication Abstract from PubMed ==
Photosynthetic prokaryotes evolved diverse light-harvesting (LH) antennas to absorb sunlight and transfer energy to reaction centers (RC). The filamentous anoxygenic phototrophs (FAPs) are important early branching photosynthetic bacteria in understanding the origin and evolution of photosynthesis. How their photosynthetic machinery assembles for efficient energy transfer is yet to be elucidated. Here, we report the 4.1 A structure of photosynthetic core complex from Roseiflexus castenholzii by cryo-electron microscopy. The RC-LH complex has a tetra-heme cytochrome c bound RC encompassed by an elliptical LH ring that is assembled from 15 LHalphabeta subunits. An N-terminal transmembrane helix of cytochrome c inserts into the LH ring, not only yielding a tightly bound cytochrome c for rapid electron transfer, but also opening a slit in the LH ring, which is further flanked by a transmembrane helix from a newly discovered subunit X. These structural features suggest an unusual quinone exchange model of prokaryotic photosynthetic machinery.

Cryo-EM structure of the RC-LH core complex from an early branching photosynthetic prokaryote.,Xin Y, Shi Y, Niu T, Wang Q, Niu W, Huang X, Ding W, Yang L, Blankenship RE, Xu X, Sun F Nat Commun. 2018 Apr 19;9(1):1568. doi: 10.1038/s41467-018-03881-x. PMID:29674684<ref>PMID:29674684</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 5yq7" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</SX>
[[Category: Large Structures]]
[[Category: Roseiflexus castenholzii]]
[[Category: Blankenship RE]]
[[Category: Ding W]]
[[Category: Huang XJ]]
[[Category: Niu TX]]
[[Category: Niu WQ]]
[[Category: Shi Y]]
[[Category: Sun F]]
[[Category: Wang QQ]]
[[Category: Xin YY]]
[[Category: Xu XL]]