|
|
| (One intermediate revision not shown.) |
| Line 3: |
Line 3: |
| | <StructureSection load='4u9q' size='340' side='right'caption='[[4u9q]], [[Resolution|resolution]] 2.10Å' scene=''> | | <StructureSection load='4u9q' size='340' side='right'caption='[[4u9q]], [[Resolution|resolution]] 2.10Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4u9q]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillo_virgola_del_koch"_trevisan_1884 "bacillo virgola del koch" trevisan 1884]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4U9Q OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4U9Q FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4u9q]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Vibrio_cholerae Vibrio cholerae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4U9Q OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4U9Q FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4u9o|4u9o]]</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]] 2.1Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">nqrA, VC_2295 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=666 "Bacillo virgola del Koch" Trevisan 1884])</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=4u9q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4u9q OCA], [https://pdbe.org/4u9q PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4u9q RCSB], [https://www.ebi.ac.uk/pdbsum/4u9q PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4u9q ProSAT]</span></td></tr> |
| - | <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=4u9q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4u9q OCA], [http://pdbe.org/4u9q PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4u9q RCSB], [http://www.ebi.ac.uk/pdbsum/4u9q PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4u9q ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/NQRA_VIBCH NQRA_VIBCH]] NQR complex catalyzes the reduction of ubiquinone-1 to ubiquinol by two successive reactions, coupled with the transport of Na(+) ions from the cytoplasm to the periplasm. NqrA to NqrE are probably involved in the second step, the conversion of ubisemiquinone to ubiquinol. | + | [https://www.uniprot.org/uniprot/NQRA_VIBCH NQRA_VIBCH] NQR complex catalyzes the reduction of ubiquinone-1 to ubiquinol by two successive reactions, coupled with the transport of Na(+) ions from the cytoplasm to the periplasm. NqrA to NqrE are probably involved in the second step, the conversion of ubisemiquinone to ubiquinol. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
| Line 19: |
Line 18: |
| | </div> | | </div> |
| | <div class="pdbe-citations 4u9q" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 4u9q" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Quinone reductase 3D structures|Quinone reductase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Bacillo virgola del koch trevisan 1884]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Fritz, G]] | + | [[Category: Vibrio cholerae]] |
| - | [[Category: Oxidoreductase]] | + | [[Category: Fritz G]] |
| - | [[Category: Rossmann fold]]
| + | |
| - | [[Category: Sodium translocation]]
| + | |
| Structural highlights
Function
NQRA_VIBCH NQR complex catalyzes the reduction of ubiquinone-1 to ubiquinol by two successive reactions, coupled with the transport of Na(+) ions from the cytoplasm to the periplasm. NqrA to NqrE are probably involved in the second step, the conversion of ubisemiquinone to ubiquinol.
Publication Abstract from PubMed
NADH oxidation in the respiratory chain is coupled to ion translocation across the membrane to build up an electrochemical gradient. The sodium-translocating NADH:quinone oxidoreductase (Na(+)-NQR), a membrane protein complex widespread among pathogenic bacteria, consists of six subunits, NqrA, B, C, D, E and F. To our knowledge, no structural information on the Na(+)-NQR complex has been available until now. Here we present the crystal structure of the Na(+)-NQR complex at 3.5 A resolution. The arrangement of cofactors both at the cytoplasmic and the periplasmic side of the complex, together with a hitherto unknown iron centre in the midst of the membrane-embedded part, reveals an electron transfer pathway from the NADH-oxidizing cytoplasmic NqrF subunit across the membrane to the periplasmic NqrC, and back to the quinone reduction site on NqrA located in the cytoplasm. A sodium channel was localized in subunit NqrB, which represents the largest membrane subunit of the Na(+)-NQR and is structurally related to urea and ammonia transporters. On the basis of the structure we propose a mechanism of redox-driven Na(+) translocation where the change in redox state of the flavin mononucleotide cofactor in NqrB triggers the transport of Na(+) through the observed channel.
Structure of the V. cholerae Na+-pumping NADH:quinone oxidoreductase.,Steuber J, Vohl G, Casutt MS, Vorburger T, Diederichs K, Fritz G Nature. 2014 Dec 4;516(7529):62-7. doi: 10.1038/nature14003. PMID:25471880[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Steuber J, Vohl G, Casutt MS, Vorburger T, Diederichs K, Fritz G. Structure of the V. cholerae Na+-pumping NADH:quinone oxidoreductase. Nature. 2014 Dec 4;516(7529):62-7. doi: 10.1038/nature14003. PMID:25471880 doi:http://dx.doi.org/10.1038/nature14003
|
