View source for 6awf


==Escherichia coli quinol:fumarate reductase crystallized without dicarboxylate==
<StructureSection load='6awf' size='340' side='right'caption='[[6awf]], [[Resolution|resolution]] 3.35&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6awf]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6AWF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6AWF FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.35&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</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=6awf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6awf OCA], [https://pdbe.org/6awf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6awf RCSB], [https://www.ebi.ac.uk/pdbsum/6awf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6awf ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FRDC_ECOLI FRDC_ECOLI] Seems to be involved in the anchoring of the catalytic components of the fumarate reductase complex to the cytoplasmic membrane.[HAMAP-Rule:MF_00708]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Quinol:fumarate reductase (QFR) is an integral membrane protein and a member of the respiratory Complex II superfamily. Although the structure of Escherichia coli QFR was first reported almost twenty years ago, many open questions of catalysis remain. Here we report two new crystal forms of QFR, one grown from the lipidic cubic phase and one grown from dodecyl maltoside micelles. QFR crystals grown from the lipid cubic phase processed as P1, merged to 7.5A resolution, and exhibited crystal packing similar to previous crystal forms. Crystals grown from dodecyl maltoside micelles processed as P21, merged to 3.35A resolution, and displayed a unique crystal packing. This latter crystal form provides the first view of the E. coli QFR active site without a dicarboxylate ligand. Instead, an unidentified anion binds at a shifted position. In one of the molecules in the asymmetric unit, this is accompanied by rotation of the capping domain of the catalytic subunit. In the other molecule, this is associated with loss of interpretable electron density for this same capping domain. Analysis of the structure suggests that the ligand adjusts the position of the capping domain.

New crystal forms of the integral membrane Escherichia coli quinol:fumarate reductase suggest that ligands control domain movement.,Starbird CA, Tomasiak TM, Singh PK, Yankovskaya V, Maklashina E, Eisenbach M, Cecchini G, Iverson TM J Struct Biol. 2017 Nov 20. pii: S1047-8477(17)30193-4. doi:, 10.1016/j.jsb.2017.11.004. PMID:29158068<ref>PMID:29158068</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6awf" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Large Structures]]
[[Category: Iverson TM]]