8f6k

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Current revision (13:13, 21 August 2024) (edit) (undo)
 
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<table><tr><td colspan='2'>[[8f6k]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Shewanella_oneidensis Shewanella oneidensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8F6K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8F6K FirstGlance]. <br>
<table><tr><td colspan='2'>[[8f6k]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Shewanella_oneidensis Shewanella oneidensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8F6K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8F6K FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.46&#8491;</td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.46&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</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=8f6k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8f6k OCA], [https://pdbe.org/8f6k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8f6k RCSB], [https://www.ebi.ac.uk/pdbsum/8f6k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8f6k ProSAT]</span></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=8f6k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8f6k OCA], [https://pdbe.org/8f6k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8f6k RCSB], [https://www.ebi.ac.uk/pdbsum/8f6k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8f6k ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[https://www.uniprot.org/uniprot/Q8E919_SHEON Q8E919_SHEON]
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[https://www.uniprot.org/uniprot/FIEF_SHEON FIEF_SHEON] Divalent metal cation transporter which exports Zn(2+), Cd(2+) and possibly Fe(2+) (PubMed:23341604, PubMed:29507252). Zn(2+)/H(+) antiporter capable of using the proton motive force to remove Zn(2+) from the cytoplasm (PubMed:34254979). May be involved in zinc and iron detoxification by efflux (By similarity).[UniProtKB:P69380]<ref>PMID:23341604</ref> <ref>PMID:29507252</ref> <ref>PMID:34254979</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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YiiP from Shewanella oneidensis is a prokaryotic Zn(2+)/H(+) antiporter that serves as a model for the Cation Diffusion Facilitator (CDF) superfamily, members of which are generally responsible for homeostasis of transition metal ions. Previous studies of YiiP as well as related CDF transporters have established a homodimeric architecture and the presence of three distinct Zn(2+) binding sites named A, B, and C. In this study, we use cryo-EM, microscale thermophoresis and molecular dynamics simulations to address the structural and functional roles of individual sites as well as the interplay between Zn(2+) binding and protonation. Structural studies indicate that site C in the cytoplasmic domain is primarily responsible for stabilizing the dimer and that site B at the cytoplasmic membrane surface controls the structural transition from an inward facing conformation to an occluded conformation. Binding data show that intramembrane site A, which is directly responsible for transport, has a dramatic pH dependence consistent with coupling to the proton motive force. A comprehensive thermodynamic model encompassing Zn(2+) binding and protonation states of individual residues indicates a transport stoichiometry of 1 Zn(2+) to 2-3 H(+) depending on the external pH. This stoichiometry would be favorable in a physiological context, allowing the cell to use the proton gradient as well as the membrane potential to drive the export of Zn(2+).
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Energy coupling and stoichiometry of Zn(2+)/H(+) antiport by the prokaryotic cation diffusion facilitator YiiP.,Hussein A, Fan S, Lopez-Redondo M, Kenney I, Zhang X, Beckstein O, Stokes DL Elife. 2023 Oct 31;12:RP87167. doi: 10.7554/eLife.87167. PMID:37906094<ref>PMID:37906094</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 8f6k" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>

Current revision

Cryo-EM structure of a Zinc-loaded H263A/D287A mutant of the YiiP-Fab complex

PDB ID 8f6k

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