View source for 8ddq


==cryo-EM structure of TRPM3 ion channel in the presence of soluble Gbg, focused on channel==
<StructureSection load='8ddq' size='340' side='right'caption='[[8ddq]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8ddq]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8DDQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8DDQ 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=3PH:1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE'>3PH</scene>, <scene name='pdbligand=9Z9:(3beta,14beta,17beta,25R)-3-[4-methoxy-3-(methoxymethyl)butoxy]spirost-5-en'>9Z9</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=8ddq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ddq OCA], [https://pdbe.org/8ddq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ddq RCSB], [https://www.ebi.ac.uk/pdbsum/8ddq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ddq ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
G-protein coupled receptors (GPCRs) govern the physiological response to stimuli by modulating the activity of downstream effectors, including ion channels. TRPM3 is an ion channel inhibited by GPCRs through direct interaction with G protein (Gbetagamma) released upon their activation. This GPCR-TRPM3 signaling pathway contributes to the analgesic effect of morphine. Here, we characterized Gbetagamma inhibition of TRPM3 using electrophysiology and single particle cryo-electron microscopy (cryo-EM). From electrophysiology, we obtained a half inhibition constant (IC50) of approximately 240 nM. Using cryo-EM, we determined structures of mouse TRPM3 expressed in human cells with and without Gbetagamma and with and without PIP(2), a lipid required for TRPM3 activity, at resolutions of 2.7-4.7 A. Gbetagamma-TRPM3 interfaces vary depending on PIP(2) occupancy; however, in all cases, Gbetagamma appears loosely attached to TRPM3. The IC50 in electrophysiology experiments raises the possibility that additional unknown factors may stabilize the TRPM3-Gbetagamma complex.

Structural and functional analyses of a GPCR-inhibited ion channel TRPM3.,Zhao C, MacKinnon R Neuron. 2023 Jan 4;111(1):81-91.e7. doi: 10.1016/j.neuron.2022.10.002. Epub 2022 , Oct 24. PMID:36283409<ref>PMID:36283409</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8ddq" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: MacKinnon R]]
[[Category: Zhao C]]