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| | ==Escherichia coli quinol:fumarate reductase crystallized without dicarboxylate== | | ==Escherichia coli quinol:fumarate reductase crystallized without dicarboxylate== |
| - | <StructureSection load='6awf' size='340' side='right' caption='[[6awf]], [[Resolution|resolution]] 3.35Å' scene=''> | + | <StructureSection load='6awf' size='340' side='right'caption='[[6awf]], [[Resolution|resolution]] 3.35Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6awf]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Eco45 Eco45], [http://en.wikipedia.org/wiki/Eco57 Eco57] and [http://en.wikipedia.org/wiki/Ecoli Ecoli]. 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 [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6AWF FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6awf]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12], [https://en.wikipedia.org/wiki/Escherichia_coli_O157:H7 Escherichia coli O157:H7] and [https://en.wikipedia.org/wiki/Escherichia_coli_S88 Escherichia coli S88]. 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='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=F3S:FE3-S4+CLUSTER'>F3S</scene>, <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>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.35Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1kf6|1kf6]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=F3S:FE3-S4+CLUSTER'>F3S</scene>, <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>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">frdA, b4154, JW4115 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI]), frdB, Z5760, ECs5134 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83334 ECO57]), frdC, ECS88_4740 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=585035 ECO45]), frdD, ECS88_4739 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=585035 ECO45])</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> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Fumarate_reductase_(quinol) Fumarate reductase (quinol)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.3.5.4 1.3.5.4] </span></td></tr>
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| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6awf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6awf OCA], [http://pdbe.org/6awf PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6awf RCSB], [http://www.ebi.ac.uk/pdbsum/6awf PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6awf ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/FRDD_ECO45 FRDD_ECO45]] Seems to be involved in the anchoring of the catalytic components of the fumarate reductase complex to the cytoplasmic membrane. [[http://www.uniprot.org/uniprot/FRDA_ECOLI FRDA_ECOLI]] Two distinct, membrane-bound, FAD-containing enzymes are responsible for the catalysis of fumarate and succinate interconversion; the fumarate reductase is used in anaerobic growth, and the succinate dehydrogenase is used in aerobic growth. [[http://www.uniprot.org/uniprot/FRDC_ECO45 FRDC_ECO45]] Seems to be involved in the anchoring of the catalytic components of the fumarate reductase complex to the cytoplasmic membrane. [[http://www.uniprot.org/uniprot/FRDB_ECO57 FRDB_ECO57]] Two distinct, membrane-bound, FAD-containing enzymes are responsible for the catalysis of fumarate and succinate interconversion; the fumarate reductase is used in anaerobic growth, and the succinate dehydrogenase is used in aerobic growth. | + | [https://www.uniprot.org/uniprot/FRDA_ECOLI FRDA_ECOLI] Two distinct, membrane-bound, FAD-containing enzymes are responsible for the catalysis of fumarate and succinate interconversion; the fumarate reductase is used in anaerobic growth, and the succinate dehydrogenase is used in aerobic growth. |
| - | <div style="background-color:#fffaf0;">
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| - | == 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.
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| - | 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>
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| - | </div>
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| - | <div class="pdbe-citations 6awf" style="background-color:#fffaf0;"></div>
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| - | == References ==
| + | |
| - | <references/>
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Eco45]] | + | [[Category: Escherichia coli K-12]] |
| - | [[Category: Eco57]] | + | [[Category: Escherichia coli O157:H7]] |
| - | [[Category: Ecoli]]
| + | [[Category: Escherichia coli S88]] |
| - | [[Category: Iverson, T M]] | + | [[Category: Large Structures]] |
| - | [[Category: Complex ii]] | + | [[Category: Iverson TM]] |
| - | [[Category: Electron transport]] | + | |
| - | [[Category: Fad]]
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| - | [[Category: Flavoenzyme]]
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| - | [[Category: Flavoprotein]]
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| - | [[Category: Fumarate reductase]]
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| - | [[Category: Quinol:fumarate reductase]]
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| - | [[Category: Succinate dehydrogenase]]
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| - | [[Category: Succinate oxidase]]
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| - | [[Category: Succinate:quinone oxidoreductase]]
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