View source for 5wen


==GluA2 bound to GSG1L in digitonin, state 2==
<SX load='5wen' size='340' side='right' viewer='molstar' caption='[[5wen]], [[Resolution|resolution]] 6.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5wen]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus] and [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5WEN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5WEN 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]] 6.8&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AJP:(25R)-2beta,15alpha-dihydroxy-5beta,8alpha,10alpha,14beta,17beta-spirostan-3alpha-yl+beta-D-glucopyranosyl-(1- 3)-beta-D-galactopyranosyl-(1- 2)-[beta-D-xylopyranosyl-(1- 3)]-beta-D-glucopyranosyl-(1- 4)-beta-D-galactopyranoside'>AJP</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=5wen FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5wen OCA], [https://pdbe.org/5wen PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5wen RCSB], [https://www.ebi.ac.uk/pdbsum/5wen PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5wen ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/GRIA2_RAT GRIA2_RAT] Receptor for glutamate that functions as ligand-gated ion channel in the central nervous system and plays an important role in excitatory synaptic transmission. L-glutamate acts as an excitatory neurotransmitter at many synapses in the central nervous system. Binding of the excitatory neurotransmitter L-glutamate induces a conformation change, leading to the opening of the cation channel, and thereby converts the chemical signal to an electrical impulse. The receptor then desensitizes rapidly and enters a transient inactive state, characterized by the presence of bound agonist. In the presence of CACNG4 or CACNG7 or CACNG8, shows resensitization which is characterized by a delayed accumulation of current flux upon continued application of glutamate.<ref>PMID:9351977</ref> <ref>PMID:19265014</ref> <ref>PMID:21172611</ref> <ref>PMID:12501192</ref> <ref>PMID:12015593</ref> <ref>PMID:12872125</ref> <ref>PMID:12730367</ref> <ref>PMID:16192394</ref> <ref>PMID:15591246</ref> <ref>PMID:17018279</ref> <ref>PMID:16483599</ref> <ref>PMID:19946266</ref> <ref>PMID:21317873</ref> <ref>PMID:21846932</ref> [https://www.uniprot.org/uniprot/GSG1L_MOUSE GSG1L_MOUSE] As a component of the inner core of AMPAR complexes, modifies AMPA receptor (AMPAR) gating.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
AMPA-subtype ionotropic glutamate receptors mediate fast excitatory neurotransmission throughout the central nervous system. Gated by the neurotransmitter glutamate, AMPA receptors are critical for synaptic strength and dysregulation of AMPA receptor-mediated signalling is linked to numerous neurological diseases. Here, we use cryo-electron microscopy to solve the structures of AMPA receptor-auxiliary subunit complexes in the apo, antagonist and agonist-bound states and elucidate the iris-like mechanism of ion channel opening. The ion channel selectivity filter is formed by the extended portions of the re-entrant M2 loops, while the helical portions of M2 contribute to extensive hydrophobic interfaces between AMPA receptor subunits in the ion channel. We show how the permeation pathway changes upon channel opening and identify conformational changes throughout the entire AMPA receptor that accompany activation and desensitization. Our findings provide a framework for understanding gating across the family of ionotropic glutamate receptors and the role of AMPA receptors in excitatory neurotransmission.

Channel opening and gating mechanism in AMPA-subtype glutamate receptors.,Twomey EC, Yelshanskaya MV, Grassucci RA, Frank J, Sobolevsky AI Nature. 2017 Jul 24. doi: 10.1038/nature23479. PMID:28737760<ref>PMID:28737760</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5wen" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</SX>
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Rattus norvegicus]]
[[Category: Frank J]]
[[Category: Grassucci RA]]
[[Category: Sobolevsky AI]]
[[Category: Twomey EC]]
[[Category: Yelshanskaya MV]]