3b61

From Proteopedia

(Difference between revisions)

Revision as of 07:27, 31 October 2018

EmrE multidrug transporter, apo crystal form

Structural highlights

3b61 is a 8 chain structure with sequence from Ecoli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	3b5d, 3b62
Gene:	emrE, eb, mvrC (ECOLI)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[EMRE_ECOLI] Multidrug transporter that expels positively charged hydrophobic drugs across the inner membrane of E.coli., thereby conferring resistance to a wide range of toxic compounds. The drug efflux is coupled to an influx of protons. Is involved in the resistance of E.coli cells to methyl viologen, ethidium bromide and acriflavine. Is also able to transport tetraphenylphosphonium (TPP(+)) and benzalkonium.^[1] ^[2] ^[3]

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 PubMed

EmrE, a multidrug transporter from Escherichia coli, functions as a homodimer of a small four-transmembrane protein. The membrane insertion topology of the two monomers is controversial. Although the EmrE protein was reported to have a unique orientation in the membrane, models based on electron microscopy and now defunct x-ray structures, as well as recent biochemical studies, posit an antiparallel dimer. We have now reanalyzed our x-ray data on EmrE. The corrected structures in complex with a transport substrate are highly similar to the electron microscopy structure. The first three transmembrane helices from each monomer surround the substrate binding chamber, whereas the fourth helices participate only in dimer formation. Selenomethionine markers clearly indicate an antiparallel orientation for the monomers, supporting a "dual topology" model.

X-ray structure of EmrE supports dual topology model.,Chen YJ, Pornillos O, Lieu S, Ma C, Chen AP, Chang G Proc Natl Acad Sci U S A. 2007 Nov 27;104(48):18999-9004. Epub 2007 Nov, 16. PMID:18024586^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Yerushalmi H, Lebendiker M, Schuldiner S. EmrE, an Escherichia coli 12-kDa multidrug transporter, exchanges toxic cations and H+ and is soluble in organic solvents. J Biol Chem. 1995 Mar 24;270(12):6856-63. PMID:7896833
↑ Yerushalmi H, Schuldiner S. An essential glutamyl residue in EmrE, a multidrug antiporter from Escherichia coli. J Biol Chem. 2000 Feb 25;275(8):5264-9. PMID:10681497
↑ Rotem D, Schuldiner S. EmrE, a multidrug transporter from Escherichia coli, transports monovalent and divalent substrates with the same stoichiometry. J Biol Chem. 2004 Nov 19;279(47):48787-93. Epub 2004 Sep 15. PMID:15371426 doi:10.1074/jbc.M408187200
↑ Chen YJ, Pornillos O, Lieu S, Ma C, Chen AP, Chang G. X-ray structure of EmrE supports dual topology model. Proc Natl Acad Sci U S A. 2007 Nov 27;104(48):18999-9004. Epub 2007 Nov, 16. PMID:18024586

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3b61"

@@ Line 1: / Line 1: @@
 ==EmrE multidrug transporter, apo crystal form==
 <StructureSection load='3b61' size='340' side='right' caption='[[3b61]], [[Resolution|resolution]] 4.50&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3b5d|3b5d]], [[3b62|3b62]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">emrE, eb, mvrC ([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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3b61 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3b61 OCA], [http://pdbe.org/3b61 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3b61 RCSB], [http://www.ebi.ac.uk/pdbsum/3b61 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=3b61 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3b61 OCA], [http://pdbe.org/3b61 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3b61 RCSB], [http://www.ebi.ac.uk/pdbsum/3b61 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3b61 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/b6/3b61_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/b6/3b61_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

3b61

From Proteopedia

Revision as of 07:27, 31 October 2018

EmrE multidrug transporter, apo crystal form

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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