View source for 4x89


==NavMs voltage-gated sodium channal pore and C-terminal domain soaked with Silver nitrate==
<StructureSection load='4x89' size='340' side='right'caption='[[4x89]], [[Resolution|resolution]] 2.62&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4x89]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Magnetococcus_marinus_MC-1 Magnetococcus marinus MC-1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4X89 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4X89 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]] 2.62&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1PE:PENTAETHYLENE+GLYCOL'>1PE</scene>, <scene name='pdbligand=2CV:HEGA-10'>2CV</scene>, <scene name='pdbligand=AG:SILVER+ION'>AG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</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=4x89 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4x89 OCA], [https://pdbe.org/4x89 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4x89 RCSB], [https://www.ebi.ac.uk/pdbsum/4x89 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4x89 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0L5S6_MAGMM A0L5S6_MAGMM] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Voltage-gated sodium channels are essential for electrical signalling across cell membranes. They exhibit strong selectivities for sodium ions over other cations, enabling the finely tuned cascade of events associated with action potentials. This paper describes the ion permeability characteristics and the crystal structure of a prokaryotic sodium channel, showing for the first time the detailed locations of sodium ions in the selectivity filter of a sodium channel. Electrostatic calculations based on the structure are consistent with the relative cation permeability ratios (Na+ approximately Li+ &gt;&gt; K+, Ca2+, Mg2+) measured for these channels. In an E178D selectivity filter mutant constructed to have altered ion selectivities, the sodium ion binding site nearest the extracellular side is missing. Unlike potassium ions in potassium channels, the sodium ions in these channels appear to be hydrated and are associated with side chains of the selectivity filter residues, rather than polypeptide backbones.

Molecular basis of ion permeability in a voltage-gated sodium channel.,Naylor CE, Bagneris C, DeCaen PG, Sula A, Scaglione A, Clapham DE, Wallace BA EMBO J. 2016 Feb 12. pii: e201593285. PMID:26873592<ref>PMID:26873592</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4x89" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ion channels 3D structures|Ion channels 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Magnetococcus marinus MC-1]]
[[Category: Bagneris C]]
[[Category: Naylor CE]]
[[Category: Wallace BA]]