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<SX load='5ipq' size='340' side='right' viewer='molstar' caption='[[5ipq]], [[Resolution|resolution]] 13.50&Aring;' scene=''>
<SX load='5ipq' size='340' side='right' viewer='molstar' caption='[[5ipq]], [[Resolution|resolution]] 13.50&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[5ipq]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/African_clawed_frog African clawed frog]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5IPQ OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5IPQ FirstGlance]. <br>
<table><tr><td colspan='2'>[[5ipq]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5IPQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5IPQ FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5iou|5iou]], [[5iov|5iov]], [[5ips|5ips]], [[5ipr|5ipr]], [[5ipt|5ipt]], [[5ipu|5ipu]], [[5ipv|5ipv]]</td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 13.5&#8491;</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">NR2B ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=8355 African clawed frog])</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=5ipq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ipq OCA], [https://pdbe.org/5ipq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5ipq RCSB], [https://www.ebi.ac.uk/pdbsum/5ipq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5ipq ProSAT]</span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5ipq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ipq OCA], [http://pdbe.org/5ipq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5ipq RCSB], [http://www.ebi.ac.uk/pdbsum/5ipq PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5ipq ProSAT]</span></td></tr>
</table>
</table>
<div style="background-color:#fffaf0;">
== Function ==
== Publication Abstract from PubMed ==
[https://www.uniprot.org/uniprot/NMDZ1_XENLA NMDZ1_XENLA] Component of NMDA receptor complexes that function as heterotetrameric, ligand-gated ion channels with high calcium permeability and voltage-dependent sensitivity to magnesium. Channel activation requires binding of the neurotransmitter glutamate to the epsilon subunit, glycine binding to the zeta subunit, plus membrane depolarization to eliminate channel inhibition by Mg(2+) (PubMed:16214956, PubMed:19524674, PubMed:21677647, PubMed:25008524, PubMed:26912815, PubMed:27135925, Ref.11, PubMed:28232581). Sensitivity to glutamate and channel kinetics depend on the subunit composition (Probable).<ref>PMID:16214956</ref> <ref>PMID:19524674</ref> <ref>PMID:21677647</ref> <ref>PMID:25008524</ref> <ref>PMID:26912815</ref> <ref>PMID:27135925</ref> <ref>PMID:28232581</ref> [PDB:5IOV]
N-methyl-D-aspartate receptors (NMDARs) are glutamate-gated, calcium-permeable ion channels that mediate synaptic transmission and underpin learning and memory. NMDAR dysfunction is directly implicated in diseases ranging from seizure to ischemia. Despite its fundamental importance, little is known about how the NMDAR transitions between inactive and active states and how small molecules inhibit or activate ion channel gating. Here, we report electron cryo-microscopy structures of the GluN1-GluN2B NMDA receptor in an ensemble of competitive antagonist-bound states, an agonist-bound form, and a state bound with agonists and the allosteric inhibitor Ro25-6981. Together with double electron-electron resonance experiments, we show how competitive antagonists rupture the ligand binding domain (LBD) gating "ring," how agonists retain the ring in a dimer-of-dimers configuration, and how allosteric inhibitors, acting within the amino terminal domain, further stabilize the LBD layer. These studies illuminate how the LBD gating ring is fundamental to signal transduction and gating in NMDARs.
 
Mechanism of NMDA Receptor Inhibition and Activation.,Zhu S, Stein RA, Yoshioka C, Lee CH, Goehring A, Mchaourab HS, Gouaux E Cell. 2016 Apr 21;165(3):704-14. doi: 10.1016/j.cell.2016.03.028. Epub 2016 Apr, 7. PMID:27062927<ref>PMID:27062927</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5ipq" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
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__TOC__
__TOC__
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[[Category: African clawed frog]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Goehring, A]]
[[Category: Xenopus laevis]]
[[Category: Gouaux, E]]
[[Category: Goehring A]]
[[Category: Lee, C H]]
[[Category: Gouaux E]]
[[Category: Mchaourab, S H]]
[[Category: Lee CH]]
[[Category: Stein, A R]]
[[Category: Mchaourab SH]]
[[Category: Yoshioka, C]]
[[Category: Stein AR]]
[[Category: Zhu, S]]
[[Category: Yoshioka C]]
[[Category: Ligand-gated ion channel]]
[[Category: Zhu S]]
[[Category: Signaling protein]]
[[Category: Synaptic transmission]]

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