6lqa: Difference between revisions
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==voltage-gated sodium channel Nav1.5 with quinidine== | |||
<StructureSection load='6lqa' size='340' side='right'caption='[[6lqa]], [[Resolution|resolution]] 3.30Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6LQA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6LQA 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]] 3.3Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=QDN:QUINIDINE'>QDN</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=6lqa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6lqa OCA], [https://pdbe.org/6lqa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6lqa RCSB], [https://www.ebi.ac.uk/pdbsum/6lqa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6lqa ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Na v 1.5, the primary voltage-gated Na + (Na v ) channel in heart, is a major target for class I antiarrhythmic agents. Here we present the cryo-EM structure of full-length human Na v 1.5 bound to quinidine, a class Ia antiarrhythmic drug, at 3.3 A resolution. Quinidine is positioned right beneath the selectivity filter in the pore domain and coordinated by residues from repeats I, III, and IV. Pore blockade by quinidine is achieved through both direct obstruction of the ion permeation path and induced rotation of an invariant Tyr residue that tightens the intracellular gate. Structural comparison with a truncated rat Na v 1.5 in the presence of flecainide, a class Ic agent, reveals distinct binding poses for the two antiarrhythmics within the pore domain. Our work reported here, along with previous studies, reveals the molecular basis for the mechanism of action of class I antiarrhythmic drugs. | |||
Structural Basis for Pore Blockade of the Human Cardiac Sodium Channel Nav1.5 by the Antiarrhythmic Drug Quinidine.,Li Z, Jin X, Wu T, Huang G, Wu K, Lei J, Pan X, Yan N Angew Chem Int Ed Engl. 2021 Mar 8. doi: 10.1002/anie.202102196. PMID:33684260<ref>PMID:33684260</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 6lqa" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Ion channels 3D structures|Ion channels 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Huang G]] | |||
[[Category: Li Z]] | |||
[[Category: Pan X]] | |||
[[Category: Yan N]] | |||
Latest revision as of 15:50, 6 November 2024
Structural highlights
Publication Abstract from PubMedNa v 1.5, the primary voltage-gated Na + (Na v ) channel in heart, is a major target for class I antiarrhythmic agents. Here we present the cryo-EM structure of full-length human Na v 1.5 bound to quinidine, a class Ia antiarrhythmic drug, at 3.3 A resolution. Quinidine is positioned right beneath the selectivity filter in the pore domain and coordinated by residues from repeats I, III, and IV. Pore blockade by quinidine is achieved through both direct obstruction of the ion permeation path and induced rotation of an invariant Tyr residue that tightens the intracellular gate. Structural comparison with a truncated rat Na v 1.5 in the presence of flecainide, a class Ic agent, reveals distinct binding poses for the two antiarrhythmics within the pore domain. Our work reported here, along with previous studies, reveals the molecular basis for the mechanism of action of class I antiarrhythmic drugs. Structural Basis for Pore Blockade of the Human Cardiac Sodium Channel Nav1.5 by the Antiarrhythmic Drug Quinidine.,Li Z, Jin X, Wu T, Huang G, Wu K, Lei J, Pan X, Yan N Angew Chem Int Ed Engl. 2021 Mar 8. doi: 10.1002/anie.202102196. PMID:33684260[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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