View source for 8abh


==Complex III2 from Yarrowia lipolytica, antimycin A bound, b-position==
<StructureSection load='8abh' size='340' side='right'caption='[[8abh]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8abh]] is a 20 chain structure with sequence from [https://en.wikipedia.org/wiki/Yarrowia_lipolytica Yarrowia lipolytica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8ABH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8ABH 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&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AWB:[(2R,3S,6S,7R,8R)-3-[(3-FORMAMIDO-2-OXIDANYL-PHENYL)CARBONYLAMINO]-8-HEXYL-2,6-DIMETHYL-4,9-BIS(OXIDANYLIDENE)-1,5-DIOXONAN-7-YL]+3-METHYLBUTANOATE'>AWB</scene>, <scene name='pdbligand=CDL:CARDIOLIPIN'>CDL</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=HEC:HEME+C'>HEC</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=PC1:1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE'>PC1</scene>, <scene name='pdbligand=PTY:PHOSPHATIDYLETHANOLAMINE'>PTY</scene>, <scene name='pdbligand=XP4:1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHATE'>XP4</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=8abh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8abh OCA], [https://pdbe.org/8abh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8abh RCSB], [https://www.ebi.ac.uk/pdbsum/8abh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8abh ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q6CG23_YARLI Q6CG23_YARLI] Component of the ubiquinol-cytochrome c oxidoreductase, a multisubunit transmembrane complex that is part of the mitochondrial electron transport chain which drives oxidative phosphorylation. The complex plays an important role in the uptake of multiple carbon sources present in different host niches.[RuleBase:RU368056]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Movement of the Rieske domain of the iron-sulfur protein is essential for intramolecular electron transfer within complex III(2) (CIII(2)) of the respiratory chain as it bridges a gap in the cofactor chain towards the electron acceptor cytochrome c. We present cryo-EM structures of CIII(2) from Yarrowia lipolytica at resolutions up to 2.0 A under different conditions, with different redox states of the cofactors of the high-potential chain. All possible permutations of three primary positions were observed, indicating that the two halves of the dimeric complex act independently. Addition of the substrate analogue decylubiquinone to CIII(2) with a reduced high-potential chain increased the occupancy of the Q(o) site. The extent of Rieske domain interactions through hydrogen bonds to the cytochrome b and cytochrome c(1) subunits varied depending on the redox state and substrate. In the absence of quinols, the reduced Rieske domain interacted more closely with cytochrome b and cytochrome c(1) than in the oxidized state. Upon addition of the inhibitor antimycin A, the heterogeneity of the cd(1)-helix and ef-loop increased, which may be indicative of a long-range effect on the Rieske domain.

Analysis of the conformational heterogeneity of the Rieske iron-sulfur protein in complex III(2) by cryo-EM.,Wieferig JP, Kuhlbrandt W IUCrJ. 2023 Jan 1;10(Pt 1):27-37. doi: 10.1107/S2052252522010570. PMID:36598500<ref>PMID:36598500</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8abh" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Yarrowia lipolytica]]
[[Category: Kuhlbrandt W]]
[[Category: Wieferig JP]]