View source for 5jmn


==Fusidic acid bound AcrB==
<StructureSection load='5jmn' size='340' side='right'caption='[[5jmn]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5jmn]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JMN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5JMN FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=D10:DECANE'>D10</scene>, <scene name='pdbligand=D12:DODECANE'>D12</scene>, <scene name='pdbligand=ETE:2-{2-[2-2-(METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL'>ETE</scene>, <scene name='pdbligand=FUA:FUSIDIC+ACID'>FUA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=HEX:HEXANE'>HEX</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=OCT:N-OCTANE'>OCT</scene>, <scene name='pdbligand=P3G:3,6,9,12,15-PENTAOXAHEPTADECANE'>P3G</scene>, <scene name='pdbligand=PTY:PHOSPHATIDYLETHANOLAMINE'>PTY</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=5jmn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5jmn OCA], [https://pdbe.org/5jmn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5jmn RCSB], [https://www.ebi.ac.uk/pdbsum/5jmn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5jmn ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ACRB_ECOLI ACRB_ECOLI] AcrAB is a drug efflux protein with a broad substrate specificity.<ref>PMID:16915237</ref> <ref>PMID:16946072</ref> <ref>PMID:17194213</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The deployment of multidrug efflux pumps is a powerful defence mechanism for Gram-negative bacterial cells when exposed to antimicrobial agents. The major multidrug efflux transport system in Escherichia coli, AcrAB-TolC, is a tripartite system using the proton-motive force as an energy source. The polyspecific substrate-binding module AcrB uses various pathways to sequester drugs from the periplasm and outer leaflet of the inner membrane. Here we report the asymmetric AcrB structure in complex with fusidic acid at a resolution of 2.5 A and mutational analysis of the putative fusidic acid binding site at the transmembrane domain. A groove shaped by the interface between transmembrane helix 1 (TM1) and TM2 specifically binds fusidic acid and other lipophilic carboxylated drugs. We propose that these bound drugs are actively displaced by an upward movement of TM2 towards the AcrB periplasmic porter domain in response to protonation events in the transmembrane domain.

Transport of lipophilic carboxylates is mediated by transmembrane helix 2 in multidrug transporter AcrB.,Oswald C, Tam HK, Pos KM Nat Commun. 2016 Dec 16;7:13819. doi: 10.1038/ncomms13819. PMID:27982032<ref>PMID:27982032</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5jmn" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Oswald C]]
[[Category: Pos KM]]
[[Category: Tam HK]]