1mm6

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[[Image:1mm6.png|left|200px]]
 
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{{STRUCTURE_1mm6| PDB=1mm6 | SCENE= }}
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==crystal structure of the GluR2 ligand binding core (S1S2J) in complex with quisqualate in a non zinc crystal form at 2.15 angstroms resolution==
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<StructureSection load='1mm6' size='340' side='right'caption='[[1mm6]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1mm6]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MM6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MM6 FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.15&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=QUS:(S)-2-AMINO-3-(3,5-DIOXO-[1,2,4]OXADIAZOLIDIN-2-YL)-PROPIONIC+ACID'>QUS</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1mm6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mm6 OCA], [https://pdbe.org/1mm6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mm6 RCSB], [https://www.ebi.ac.uk/pdbsum/1mm6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mm6 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[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>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/mm/1mm6_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1mm6 ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Glutamate is the major excitatory neurotransmitter in the mammalian brain. The (S)-2-amino-3-(3-hydroxy-5-methyl-4-isoxazole)propionic acid (AMPA)-subtype glutamate receptor, a ligand-gated ion channel, mediates most of the fast excitatory synaptic transmission in the mammalian central nervous system. Here we present electrophysiological, biochemical, and crystallographic data on the interactions between quisqualate and the GluR2 receptor ion channel and its corresponding ligand binding core. Quisqualate is a high-affinity, full agonist which like AMPA and glutamate elicits maximum peak current responses, and stabilizes the ligand binding core in a fully closed conformation, reinforcing the concept that full agonists produce similar conformational changes [Armstrong, N., and Gouaux, E. (2000) Neuron 28, 165-181]. Nevertheless, the mechanism of quisqualate binding is different from that of AMPA but similar to that of glutamate, illustrating that quisqualate is a faithful glutamate analogue. A detailed comparison of the three agonist complexes reveals distinct binding mechanisms, particularly in the region of a hydrophobic pocket that is proximal to the anionic gamma-substituents, and demonstrates the importance of agonist-water-receptor interactions. The hydrophobic pocket, which is predicted to vary in chemical character between receptor subtypes, probably plays an important role in determining receptor subtype specificity.
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===crystal structure of the GluR2 ligand binding core (S1S2J) in complex with quisqualate in a non zinc crystal form at 2.15 angstroms resolution===
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Mechanism of activation and selectivity in a ligand-gated ion channel: structural and functional studies of GluR2 and quisqualate.,Jin R, Horning M, Mayer ML, Gouaux E Biochemistry. 2002 Dec 31;41(52):15635-43. PMID:12501192<ref>PMID:12501192</ref>
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{{ABSTRACT_PUBMED_12501192}}
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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==About this Structure==
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<div class="pdbe-citations 1mm6" style="background-color:#fffaf0;"></div>
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[[1mm6]] is a 2 chain structure of [[Ionotropic Glutamate Receptors]] with sequence from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MM6 OCA].
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==See Also==
==See Also==
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*[[Ionotropic Glutamate Receptors|Ionotropic Glutamate Receptors]]
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*[[Glutamate receptor 3D structures|Glutamate receptor 3D structures]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:012501192</ref><references group="xtra"/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Rattus norvegicus]]
[[Category: Rattus norvegicus]]
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[[Category: Gouaux, E.]]
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[[Category: Gouaux E]]
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[[Category: Horning, M.]]
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[[Category: Horning M]]
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[[Category: Jin, R.]]
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[[Category: Jin R]]
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[[Category: Mayer, M L.]]
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[[Category: Mayer ML]]
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[[Category: Complex]]
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[[Category: Full agonist]]
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[[Category: Glur2]]
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[[Category: Ionotropic glutamate receptor]]
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[[Category: Ligand binding core]]
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[[Category: Membrane protein]]
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[[Category: Quisqualate]]
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[[Category: S1s2]]
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Current revision

crystal structure of the GluR2 ligand binding core (S1S2J) in complex with quisqualate in a non zinc crystal form at 2.15 angstroms resolution

PDB ID 1mm6

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