1ek9: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1ek9]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. The November 2007 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Multidrug Resistance Transporters'' by David S. Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2007_11 10.2210/rcsb_pdb/mom_2007_11]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EK9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1EK9 FirstGlance]. <br> | <table><tr><td colspan='2'>[[1ek9]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. The November 2007 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Multidrug Resistance Transporters'' by David S. Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2007_11 10.2210/rcsb_pdb/mom_2007_11]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EK9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1EK9 FirstGlance]. <br> | ||
</td></tr><tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> | ||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ek9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ek9 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ek9 RCSB], [http://www.ebi.ac.uk/pdbsum/1ek9 PDBsum]</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=1ek9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ek9 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ek9 RCSB], [http://www.ebi.ac.uk/pdbsum/1ek9 PDBsum]</span></td></tr> | ||
<table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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[[Category: Multidrug Resistance Transporters]] | [[Category: Multidrug Resistance Transporters]] | ||
[[Category: RCSB PDB Molecule of the Month]] | [[Category: RCSB PDB Molecule of the Month]] | ||
[[Category: Hughes, C | [[Category: Hughes, C]] | ||
[[Category: Koronakis, E | [[Category: Koronakis, E]] | ||
[[Category: Koronakis, V | [[Category: Koronakis, V]] | ||
[[Category: Luisi, B | [[Category: Luisi, B]] | ||
[[Category: Sharff, A J | [[Category: Sharff, A J]] | ||
[[Category: Alpha helical barrel]] | [[Category: Alpha helical barrel]] | ||
[[Category: Beta barrel]] | [[Category: Beta barrel]] | ||
[[Category: Integral membrane protein]] | [[Category: Integral membrane protein]] | ||
[[Category: Membrane protein]] | [[Category: Membrane protein]] | ||
Revision as of 02:25, 23 December 2014
2.1A X-RAY STRUCTURE OF TOLC: AN INTEGRAL OUTER MEMBRANE PROTEIN AND EFFLUX PUMP COMPONENT FROM ESCHERICHIA COLI2.1A X-RAY STRUCTURE OF TOLC: AN INTEGRAL OUTER MEMBRANE PROTEIN AND EFFLUX PUMP COMPONENT FROM ESCHERICHIA COLI
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedDiverse molecules, from small antibacterial drugs to large protein toxins, are exported directly across both cell membranes of gram-negative bacteria. This export is brought about by the reversible interaction of substrate-specific inner-membrane proteins with an outer-membrane protein of the TolC family, thus bypassing the intervening periplasm. Here we report the 2.1-A crystal structure of TolC from Escherichia coli, revealing a distinctive and previously unknown fold. Three TolC protomers assemble to form a continuous, solvent-accessible conduit--a 'channel-tunnel' over 140 A long that spans both the outer membrane and periplasmic space. The periplasmic or proximal end of the tunnel is sealed by sets of coiled helices. We suggest these could be untwisted by an allosteric mechanism, mediated by protein-protein interactions, to open the tunnel. The structure provides an explanation of how the cell cytosol is connected to the external environment during export, and suggests a general mechanism for the action of bacterial efflux pumps. Crystal structure of the bacterial membrane protein TolC central to multidrug efflux and protein export.,Koronakis V, Sharff A, Koronakis E, Luisi B, Hughes C Nature. 2000 Jun 22;405(6789):914-9. PMID:10879525[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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