View source for 6giq


==Saccharomyces cerevisiae respiratory supercomplex III2IV==
<SX load='6giq' size='340' side='right' viewer='molstar' caption='[[6giq]], [[Resolution|resolution]] 3.23&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6giq]] is a 20 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6GIQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6GIQ 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]] 3.23&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=6PH:(1R)-2-(PHOSPHONOOXY)-1-[(TRIDECANOYLOXY)METHYL]ETHYL+PENTADECANOATE'>6PH</scene>, <scene name='pdbligand=7PH:(1R)-2-(DODECANOYLOXY)-1-[(PHOSPHONOOXY)METHYL]ETHYL+TETRADECANOATE'>7PH</scene>, <scene name='pdbligand=8PE:(2R)-3-{[(S)-(2-AMINOETHOXY)(HYDROXY)PHOSPHORYL]OXY}-2-(TETRADECANOYLOXY)PROPYL+OCTADECANOATE'>8PE</scene>, <scene name='pdbligand=9PE:(1R)-2-{[(S)-(2-AMINOETHOXY)(HYDROXY)PHOSPHORYL]OXY}-1-[(HEPTANOYLOXY)METHYL]ETHYL+OCTADECANOATE'>9PE</scene>, <scene name='pdbligand=CN3:(2R,5S,11R,14R)-5,8,11-TRIHYDROXY-2-(NONANOYLOXY)-5,11-DIOXIDO-16-OXO-14-[(PROPANOYLOXY)METHYL]-4,6,10,12,15-PENTAOXA-5,11-DIPHOSPHANONADEC-1-YL+UNDECANOATE'>CN3</scene>, <scene name='pdbligand=CN5:(5S,11R)-5,8,11-TRIHYDROXY-5,11-DIOXIDO-17-OXO-4,6,10,12,16-PENTAOXA-5,11-DIPHOSPHAOCTADEC-1-YL+PENTADECANOATE'>CN5</scene>, <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=CUA:DINUCLEAR+COPPER+ION'>CUA</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=HEA:HEME-A'>HEA</scene>, <scene name='pdbligand=HEC:HEME+C'>HEC</scene>, <scene name='pdbligand=PCF:1,2-DIACYL-SN-GLYCERO-3-PHOSHOCHOLINE'>PCF</scene>, <scene name='pdbligand=UQ6:5-(3,7,11,15,19,23-HEXAMETHYL-TETRACOSA-2,6,10,14,18,22-HEXAENYL)-2,3-DIMETHOXY-6-METHYL-BENZENE-1,4-DIOL'>UQ6</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=6giq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6giq OCA], [https://pdbe.org/6giq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6giq RCSB], [https://www.ebi.ac.uk/pdbsum/6giq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6giq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/QCR1_YEAST QCR1_YEAST] Component of the ubiquinol-cytochrome c reductase complex (complex III or cytochrome b-c1 complex), which is part of the mitochondrial respiratory chain that generates an electrochemical potential coupled to ATP synthesis. The complex couples electron transfer from ubiquinol to cytochrome c. COR1 may mediate formation of the complex between cytochromes c and c1.
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== Publication Abstract from PubMed ==
Respiratory chain complexes execute energy conversion by connecting electron transport with proton translocation over the inner mitochondrial membrane to fuel ATP synthesis. Notably, these complexes form multi-enzyme assemblies known as respiratory supercomplexes. Here we used single-particle cryo-EM to determine the structures of the yeast mitochondrial respiratory supercomplexes III2IV and III2IV2, at 3.2-A and 3.5-A resolutions, respectively. We revealed the overall architecture of the supercomplex, which deviates from the previously determined assemblies in mammals; obtained a near-atomic structure of the yeast complex IV; and identified the protein-protein and protein-lipid interactions implicated in supercomplex formation. Take together, our results demonstrate convergent evolution of supercomplexes in mitochondria that, while building similar assemblies, results in substantially different arrangements and structural solutions to support energy conversion.

Cryo-EM structure of the yeast respiratory supercomplex.,Rathore S, Berndtsson J, Marin-Buera L, Conrad J, Carroni M, Brzezinski P, Ott M Nat Struct Mol Biol. 2019 Jan;26(1):50-57. doi: 10.1038/s41594-018-0169-7. Epub, 2018 Dec 31. PMID:30598556<ref>PMID:30598556</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 6giq" style="background-color:#fffaf0;"></div>

==See Also==
*[[Cytochrome C 3D structures|Cytochrome C 3D structures]]
*[[Cytochrome bc1 3D structures|Cytochrome bc1 3D structures]]
*[[Cytochrome c oxidase 3D structures|Cytochrome c oxidase 3D structures]]
== References ==
<references/>
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</SX>
[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Berndtsson J]]
[[Category: Conrad J]]
[[Category: Ott M]]
[[Category: Rathore S]]