View source for 6fo2


==CryoEM structure of bovine cytochrome bc1 with no ligand bound==
<SX load='6fo2' size='340' side='right' viewer='molstar' caption='[[6fo2]], [[Resolution|resolution]] 4.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6fo2]] is a 20 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6FO2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6FO2 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]] 4.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEC:HEME+C'>HEC</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</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=6fo2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6fo2 OCA], [https://pdbe.org/6fo2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6fo2 RCSB], [https://www.ebi.ac.uk/pdbsum/6fo2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6fo2 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/QCR1_BOVIN QCR1_BOVIN] This is a component of the ubiquinol-cytochrome c reductase complex (complex III or cytochrome b-c1 complex), which is part of the mitochondrial respiratory chain. This protein may mediate formation of the complex between cytochromes c and c1.
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== Publication Abstract from PubMed ==
Cytochrome bc1, a dimeric multi-subunit electron-transport protein embedded in the inner mitochondrial membrane, is a major drug target for the treatment and prevention of malaria and toxoplasmosis. Structural studies of cytochrome bc1 from mammalian homologues co-crystallized with lead compounds have underpinned structure-based drug design to develop compounds with higher potency and selectivity. However, owing to the limited amount of cytochrome bc1 that may be available from parasites, all efforts have been focused on homologous cytochrome bc1 complexes from mammalian species, which has resulted in the failure of some drug candidates owing to toxicity in the host. Crystallographic studies of the native parasite proteins are not feasible owing to limited availability of the proteins. Here, it is demonstrated that cytochrome bc1 is highly amenable to single-particle cryo-EM (which uses significantly less protein) by solving the apo and two inhibitor-bound structures to approximately 4.1 A resolution, revealing clear inhibitor density at the binding site. Therefore, cryo-EM is proposed as a viable alternative method for structure-based drug discovery using both host and parasite enzymes.

X-ray and cryo-EM structures of inhibitor-bound cytochrome bc1 complexes for structure-based drug discovery.,Amporndanai K, Johnson RM, O'Neill PM, Fishwick CWG, Jamson AH, Rawson S, Muench SP, Hasnain SS, Antonyuk SV IUCrJ. 2018 Feb 20;5(Pt 2):200-210. doi: 10.1107/S2052252518001616. eCollection, 2018 Mar 1. PMID:29765610<ref>PMID:29765610</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 6fo2" style="background-color:#fffaf0;"></div>

==See Also==
*[[Cytochrome bc1 3D structures|Cytochrome bc1 3D structures]]
== References ==
<references/>
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[[Category: Bos taurus]]
[[Category: Large Structures]]
[[Category: Amporndanai K]]
[[Category: Antonyuk SV]]
[[Category: Fishwick CWG]]
[[Category: Hasnain SS]]
[[Category: Jamson AH]]
[[Category: Johnson RM]]
[[Category: Muench SP]]
[[Category: O'Neill PM]]
[[Category: Rawson SD]]