View source for 4mrr


==Structure of a bacterial Atm1-family ABC transporter==
<StructureSection load='4mrr' size='340' side='right'caption='[[4mrr]], [[Resolution|resolution]] 2.97&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4mrr]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Novosphingobium_aromaticivorans_DSM_12444 Novosphingobium aromaticivorans DSM 12444]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MRR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4MRR 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]] 2.97&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LDA:LAURYL+DIMETHYLAMINE-N-OXIDE'>LDA</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</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=4mrr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mrr OCA], [https://pdbe.org/4mrr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4mrr RCSB], [https://www.ebi.ac.uk/pdbsum/4mrr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4mrr ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ATM1_NOVAD ATM1_NOVAD] Mediates the ATP-dependent export of glutathione-conjugated substrates, such as heavy metal-glutathione conjugates. ATP hydrolysis is stimulated by glutathione binding. Protects cells against toxic heavy metal ions, such as silver and mercury ions. May also mediate the transport of glutathione-conjugated aromatic hydrocarbons, such as dinitrobenzene.<ref>PMID:24604198</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Although substantial progress has been achieved in the structural analysis of exporters from the superfamily of adenosine triphosphate (ATP)-binding cassette (ABC) transporters, much less is known about how they selectively recognize substrates and how substrate binding is coupled to ATP hydrolysis. We have addressed these questions through crystallographic analysis of the Atm1/ABCB7/HMT1/ABCB6 ortholog from Novosphingobium aromaticivorans DSM 12444, NaAtm1, at 2.4 angstrom resolution. Consistent with a physiological role in cellular detoxification processes, functional studies showed that glutathione derivatives can serve as substrates for NaAtm1 and that its overexpression in Escherichia coli confers protection against silver and mercury toxicity. The glutathione binding site highlights the articulated design of ABC exporters, with ligands and nucleotides spanning structurally conserved elements to create adaptable interfaces accommodating conformational rearrangements during the transport cycle.

Structural basis for heavy metal detoxification by an Atm1-type ABC exporter.,Lee JY, Yang JG, Zhitnitsky D, Lewinson O, Rees DC Science. 2014 Mar 7;343(6175):1133-6. doi: 10.1126/science.1246489. PMID:24604198<ref>PMID:24604198</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4mrr" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Novosphingobium aromaticivorans DSM 12444]]
[[Category: Lee JY]]
[[Category: Lewinson O]]
[[Category: Rees DC]]
[[Category: Yang JG]]
[[Category: Zhitnitsky D]]