View source for 8xgj


==Human Cx36/GJD2 gap junction channel in complex with mefloquine.==
<StructureSection load='8xgj' size='340' side='right'caption='[[8xgj]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8xgj]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8XGJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8XGJ 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]] 2.7&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MC3:1,2-DIMYRISTOYL-RAC-GLYCERO-3-PHOSPHOCHOLINE'>MC3</scene>, <scene name='pdbligand=YMZ:MEFLOQUINE'>YMZ</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=8xgj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8xgj OCA], [https://pdbe.org/8xgj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8xgj RCSB], [https://www.ebi.ac.uk/pdbsum/8xgj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8xgj ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CXD2_HUMAN CXD2_HUMAN] One gap junction consists of a cluster of closely packed pairs of transmembrane channels, the connexons, through which materials of low MW diffuse from one cell to a neighboring cell.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Connexin 36 (Cx36) forms interneuronal gap junctions, establishing electrical synapses for rapid synaptic transmission. In disease conditions, inhibiting Cx36 gap junction channels (GJCs) is beneficial, as it prevents abnormal synchronous neuronal firing and apoptotic signal propagation, mitigating seizures and progressive cell death. Here, we present cryo-electron microscopy structures of human Cx36 GJC in complex with known channel inhibitors, such as mefloquine, arachidonic acid, and 1-hexanol. Notably, these inhibitors competitively bind to the binding pocket of the N-terminal helices (NTH), inducing a conformational shift from the pore-lining NTH (PLN) state to the flexible NTH (FN) state. This leads to the obstruction of the channel pore by flat double-layer densities of lipids. These studies elucidate the molecular mechanisms of how Cx36 GJC can be modulated by inhibitors, providing valuable insights into potential therapeutic applications.

Mefloquine-induced conformational shift in Cx36 N-terminal helix leading to channel closure mediated by lipid bilayer.,Cho HJ, Chung DK, Lee HH Nat Commun. 2024 Oct 25;15(1):9223. doi: 10.1038/s41467-024-53587-6. PMID:39455592<ref>PMID:39455592</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8xgj" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Cho HJ]]
[[Category: Lee HH]]