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| | ==Crystal structures of CusC review conformational changes accompanying folding and transmembrane channel formation== | | ==Crystal structures of CusC review conformational changes accompanying folding and transmembrane channel formation== |
| - | <StructureSection load='4k7k' size='340' side='right' caption='[[4k7k]], [[Resolution|resolution]] 2.53Å' scene=''> | + | <StructureSection load='4k7k' size='340' side='right'caption='[[4k7k]], [[Resolution|resolution]] 2.53Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4k7k]] is a 2 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=4K7K OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4K7K FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4k7k]] is a 2 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=4K7K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4K7K FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">cusC, ibeB, ylcB, b0572, JW0561 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</td></tr> | + | </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=4k7k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4k7k OCA], [https://pdbe.org/4k7k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4k7k RCSB], [https://www.ebi.ac.uk/pdbsum/4k7k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4k7k 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=4k7k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4k7k OCA], [http://pdbe.org/4k7k PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4k7k RCSB], [http://www.ebi.ac.uk/pdbsum/4k7k PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4k7k ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CUSC_ECOLI CUSC_ECOLI]] Part of a cation efflux system that mediates resistance to copper and silver. In pathogenic strains it allows the bacteria to invade brain microvascular endothelial cells (BMEC) thus allowing it to cross the blood-brain barrier and cause neonatal meningitis.<ref>PMID:11399769</ref> <ref>PMID:12813074</ref> | + | [https://www.uniprot.org/uniprot/CUSC_ECOLI CUSC_ECOLI] Part of a cation efflux system that mediates resistance to copper and silver. In pathogenic strains it allows the bacteria to invade brain microvascular endothelial cells (BMEC) thus allowing it to cross the blood-brain barrier and cause neonatal meningitis.<ref>PMID:11399769</ref> <ref>PMID:12813074</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Ecoli]] | + | [[Category: Escherichia coli K-12]] |
| - | [[Category: Lei, H T]] | + | [[Category: Large Structures]] |
| - | [[Category: Su, C C]] | + | [[Category: Lei H-T]] |
| - | [[Category: Beta barrel]] | + | [[Category: Su C-C]] |
| - | [[Category: Membrane protein]]
| + | |
| Structural highlights
Function
CUSC_ECOLI Part of a cation efflux system that mediates resistance to copper and silver. In pathogenic strains it allows the bacteria to invade brain microvascular endothelial cells (BMEC) thus allowing it to cross the blood-brain barrier and cause neonatal meningitis.[1] [2]
Publication Abstract from PubMed
Gram-negative bacteria, such as Escherichia coli, frequently utilize tripartite efflux complexes in the RND (resistance-nodulation-cell division) family to expel diverse toxic compounds from the cell. These complexes span both the inner and outer membranes of the bacterium via an alpha-helical, inner membrane transporter; a periplasmic membrane fusion protein; and a beta-barrel, outer membrane channel. One such efflux system, CusCBA, is responsible for extruding biocidal Cu(I) and Ag(I) ions. To remove these toxic ions, the CusC outer membrane channel must form a beta-barrel structural domain, which creates a pore and spans the entire outer membrane. We here report the crystal structures of wild-type CusC, as well as two CusC mutants, suggesting that the first N-terminal cysteine residue plays an important role in protein-membrane interactions and is critical for the insertion of this channel protein into the outer membrane. These structures provide insight into the mechanisms on CusC folding and transmembrane channel formation. It is also found that the interactions between CusC and membrane may be crucial for controlling the opening and closing of this beta-barrel, outer membrane channel.
Crystal Structures of CusC Review Conformational Changes Accompanying Folding and Transmembrane Channel Formation.,Lei HT, Bolla JR, Su CC, Yu EW J Mol Biol. 2013 Oct 4. pii: S0022-2836(13)00626-8. doi:, 10.1016/j.jmb.2013.09.042. PMID:24099674[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Outten FW, Huffman DL, Hale JA, O'Halloran TV. The independent cue and cus systems confer copper tolerance during aerobic and anaerobic growth in Escherichia coli. J Biol Chem. 2001 Aug 17;276(33):30670-7. Epub 2001 Jun 8. PMID:11399769 doi:http://dx.doi.org/10.1074/jbc.M104122200
- ↑ Franke S, Grass G, Rensing C, Nies DH. Molecular analysis of the copper-transporting efflux system CusCFBA of Escherichia coli. J Bacteriol. 2003 Jul;185(13):3804-12. PMID:12813074
- ↑ Lei HT, Bolla JR, Su CC, Yu EW. Crystal Structures of CusC Review Conformational Changes Accompanying Folding and Transmembrane Channel Formation. J Mol Biol. 2013 Oct 4. pii: S0022-2836(13)00626-8. doi:, 10.1016/j.jmb.2013.09.042. PMID:24099674 doi:http://dx.doi.org/10.1016/j.jmb.2013.09.042
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