7mts: Difference between revisions
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==CryoEM Structure of mGlu2 - Gi Complex== | |||
<StructureSection load='7mts' size='340' side='right'caption='[[7mts]], [[Resolution|resolution]] 3.20Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[7mts]] is a 5 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=7MTS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7MTS 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]] 3.2Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GLU:GLUTAMIC+ACID'>GLU</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=ZQY:2-methoxy-6-propyl-~{N}-[2-[4-(1~{H}-1,2,3,4-tetrazol-5-ylmethoxy)phenyl]ethyl]thieno[2,3-d]pyrimidin-4-amine'>ZQY</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=7mts FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7mts OCA], [https://pdbe.org/7mts PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7mts RCSB], [https://www.ebi.ac.uk/pdbsum/7mts PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7mts ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/GRM2_HUMAN GRM2_HUMAN] G-protein coupled receptor for glutamate. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Signaling inhibits adenylate cyclase activity. May mediate suppression of neurotransmission or may be involved in synaptogenesis or synaptic stabilization.<ref>PMID:18297054</ref> <ref>PMID:22300836</ref> <ref>PMID:23129762</ref> <ref>PMID:7620613</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Family C G-protein-coupled receptors (GPCRs) operate as obligate dimers with extracellular domains that recognize small ligands, leading to G-protein activation on the transmembrane (TM) domains of these receptors by an unknown mechanism(1). Here we show structures of homodimers of the family C metabotropic glutamate receptor 2 (mGlu2) in distinct functional states and in complex with heterotrimeric Gi. Upon activation of the extracellular domain, the two transmembrane domains undergo extensive rearrangement in relative orientation to establish an asymmetric TM6-TM6 interface that promotes conformational changes in the cytoplasmic domain of one protomer. Nucleotide-bound Gi can be observed pre-coupled to inactive mGlu2, but its transition to the nucleotide-free form seems to depend on establishing the active-state TM6-TM6 interface. In contrast to family A and B GPCRs, G-protein coupling does not involve the cytoplasmic opening of TM6 but is facilitated through the coordination of intracellular loops 2 and 3, as well as a critical contribution from the C terminus of the receptor. The findings highlight the synergy of global and local conformational transitions to facilitate a new mode of G-protein activation. | |||
G-protein activation by a metabotropic glutamate receptor.,Seven AB, Barros-Alvarez X, de Lapeyriere M, Papasergi-Scott MM, Robertson MJ, Zhang C, Nwokonko RM, Gao Y, Meyerowitz JG, Rocher JP, Schelshorn D, Kobilka BK, Mathiesen JM, Skiniotis G Nature. 2021 Jun 30. pii: 10.1038/s41586-021-03680-3. doi:, 10.1038/s41586-021-03680-3. PMID:34194039<ref>PMID:34194039</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 7mts" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Metabotropic glutamate receptor 3D structures|Metabotropic glutamate receptor 3D structures]] | |||
*[[Transducin 3D structures|Transducin 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Homo sapiens]] | |||
[[Category: Large Structures]] | |||
[[Category: Barros-Alvarez X]] | |||
[[Category: Seven AB]] | |||
[[Category: Skiniotis G]] | |||