6w7c: Difference between revisions
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New page: '''Unreleased structure''' The entry 6w7c is ON HOLD Authors: Description: Category: Unreleased Structures |
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The | ==K2P2.1 (TREK-1), 1 mM K+== | ||
<StructureSection load='6w7c' size='340' side='right'caption='[[6w7c]], [[Resolution|resolution]] 3.40Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6W7C OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6W7C 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]] 3.4Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=B7G:HEPTYL-BETA-D-GLUCOPYRANOSIDE'>B7G</scene>, <scene name='pdbligand=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand=D10:DECANE'>D10</scene>, <scene name='pdbligand=D12:DODECANE'>D12</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=OCT:N-OCTANE'>OCT</scene>, <scene name='pdbligand=R16:HEXADECANE'>R16</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=6w7c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6w7c OCA], [https://pdbe.org/6w7c PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6w7c RCSB], [https://www.ebi.ac.uk/pdbsum/6w7c PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6w7c ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
K2P potassium channels regulate cellular excitability using their selectivity filter (C-type) gate. C-type gating mechanisms, best characterized in homotetrameric potassium channels, remain controversial and are attributed to selectivity filter pinching, dilation, or subtle structural changes. The extent to which such mechanisms control C-type gating of innately heterodimeric K2Ps is unknown. Here, combining K2P2.1 (TREK-1) x-ray crystallography in different potassium concentrations, potassium anomalous scattering, molecular dynamics, and electrophysiology, we uncover unprecedented, asymmetric, potassium-dependent conformational changes that underlie K2P C-type gating. These asymmetric order-disorder transitions, enabled by the K2P heterodimeric architecture, encompass pinching and dilation, disrupt the S1 and S2 ion binding sites, require the uniquely long K2P SF2-M4 loop and conserved "M3 glutamate network," and are suppressed by the K2P C-type gate activator ML335. These findings demonstrate that two distinct C-type gating mechanisms can operate in one channel and underscore the SF2-M4 loop as a target for K2P channel modulator development. | |||
K2P channel C-type gating involves asymmetric selectivity filter order-disorder transitions.,Lolicato M, Natale AM, Abderemane-Ali F, Crottes D, Capponi S, Duman R, Wagner A, Rosenberg JM, Grabe M, Minor DL Jr Sci Adv. 2020 Oct 30;6(44). pii: 6/44/eabc9174. doi: 10.1126/sciadv.abc9174., Print 2020 Oct. PMID:33127683<ref>PMID:33127683</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 6w7c" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Potassium channel 3D structures|Potassium channel 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Lolicato M]] | |||
[[Category: Minor DL]] | |||
