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| | ==Crystal structure of the CusBA heavy-metal efflux complex from Escherichia coli, R mutant== | | ==Crystal structure of the CusBA heavy-metal efflux complex from Escherichia coli, R mutant== |
| - | <StructureSection load='4dop' size='340' side='right' caption='[[4dop]], [[Resolution|resolution]] 4.20Å' scene=''> | + | <StructureSection load='4dop' size='340' side='right'caption='[[4dop]], [[Resolution|resolution]] 4.20Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4dop]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4DOP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4DOP FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4dop]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4DOP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4DOP FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3ne5|3ne5]], [[4dnr|4dnr]], [[4dnt|4dnt]]</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]] 4.2Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">b0574, cusB, JW0563, ylcD ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI]), cusA, ybdE, b0575, JW0564 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</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=4dop FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4dop OCA], [https://pdbe.org/4dop PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4dop RCSB], [https://www.ebi.ac.uk/pdbsum/4dop PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4dop 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=4dop FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4dop OCA], [http://pdbe.org/4dop PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4dop RCSB], [http://www.ebi.ac.uk/pdbsum/4dop PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4dop ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CUSB_ECOLI CUSB_ECOLI]] Part of a cation efflux system that mediates resistance to copper and silver.<ref>PMID:11399769</ref> <ref>PMID:12813074</ref> [[http://www.uniprot.org/uniprot/CUSA_ECOLI CUSA_ECOLI]] Part of a cation efflux system that mediates resistance to copper and silver.<ref>PMID:11399769</ref> <ref>PMID:12813074</ref> | + | [https://www.uniprot.org/uniprot/CUSB_ECOLI CUSB_ECOLI] Part of a cation efflux system that mediates resistance to copper and silver.<ref>PMID:11399769</ref> <ref>PMID:12813074</ref> |
| - | <div style="background-color:#fffaf0;">
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| - | == Publication Abstract from PubMed ==
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| - | Gram-negative bacteria expel various toxic chemicals via tripartite efflux pumps belonging to the resistance-nodulation-cell division superfamily. These pumps span both the inner and outer membranes of the cell. The three components of these tripartite systems are an inner-membrane, substrate-binding transporter (or pump); a periplasmic membrane fusion protein (or adaptor); and an outer-membrane-anchored channel. These three efflux proteins interact in the periplasmic space to form the three-part complexes. We previously presented the crystal structures of both the inner-membrane transporter CusA and membrane fusion protein CusB of the CusCBA tripartite efflux system from Escherichia coli. We also described the co-crystal structure of the CusBA adaptor-transporter, revealing that the trimeric CusA efflux pump assembles with six CusB protein molecules to form the complex CusB(6)-CusA(3). We here report three different conformers of the crystal structures of CusBA-Cu(I), suggesting a mechanism on how Cu(I) binding initiates a sequence of conformational transitions in the transport cycle. Genetic analysis and transport assays indicate that charged residues, in addition to the methionine pairs and clusters, are essential for extruding metal ions out of the cell.
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| - | Charged Amino Acids (R83, E567, D617, E625, R669, and K678) of CusA Are Required for Metal Ion Transport in the Cus Efflux System.,Su CC, Long F, Lei HT, Bolla JR, Do SV, Rajashankar KR, Yu EW J Mol Biol. 2012 Jun 6. PMID:22683351<ref>PMID:22683351</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 4dop" style="background-color:#fffaf0;"></div>
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| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Ecoli]] | + | [[Category: Escherichia coli K-12]] |
| - | [[Category: Long, F]] | + | [[Category: Large Structures]] |
| - | [[Category: Su, C C]] | + | [[Category: Long F]] |
| - | [[Category: Yu, E]] | + | [[Category: Su C-C]] |
| - | [[Category: Beta barrel]]
| + | [[Category: Yu E]] |
| - | [[Category: Transport protein]]
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