1s7y

From Proteopedia

(Difference between revisions)

Revision as of 18:30, 25 December 2014

Crystal structure of the GluR6 ligand binding core in complex with glutamate at 1.75 A resolution orthorhombic form

Structural highlights

1s7y is a 2 chain structure with sequence from Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	1s50, 1ftj, 1pb7, 1ii5
Gene:	GRIK2, GLUR6 (Rattus norvegicus)
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[GRIK2_RAT] Ionotropic glutamate receptor. 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. May be involved in the transmission of light information from the retina to the hypothalamus. Modulates cell surface expression of NETO2 (By similarity).^[1] ^[2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Little is known about the molecular mechanisms underlying differences in the ligand binding properties of AMPA, kainate, and NMDA subtype glutamate receptors. Crystal structures of the GluR5 and GluR6 kainate receptor ligand binding cores in complexes with glutamate, 2S,4R-4-methylglutamate, kainate, and quisqualate have now been solved. The structures reveal that the ligand binding cavities are 40% (GluR5) and 16% (GluR6) larger than for GluR2. The binding of AMPA- and GluR5-selective agonists to GluR6 is prevented by steric occlusion, which also interferes with the high-affinity binding of 2S,4R-4-methylglutamate to AMPA receptors. Strikingly, the extent of domain closure produced by the GluR6 partial agonist kainate is only 3 degrees less than for glutamate and 11 degrees greater than for the GluR2 kainate complex. This, together with extensive interdomain contacts between domains 1 and 2 of GluR5 and GluR6, absent from AMPA receptors, likely contributes to the high stability of GluR5 and GluR6 kainate complexes.

Crystal structures of the GluR5 and GluR6 ligand binding cores: molecular mechanisms underlying kainate receptor selectivity.,Mayer ML Neuron. 2005 Feb 17;45(4):539-52. PMID:15721240^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Martin S, Nishimune A, Mellor JR, Henley JM. SUMOylation regulates kainate-receptor-mediated synaptic transmission. Nature. 2007 May 17;447(7142):321-5. Epub 2007 May 7. PMID:17486098 doi:nature05736
↑ Weston MC, Schuck P, Ghosal A, Rosenmund C, Mayer ML. Conformational restriction blocks glutamate receptor desensitization. Nat Struct Mol Biol. 2006 Dec;13(12):1120-7. Epub 2006 Nov 19. PMID:17115050 doi:http://dx.doi.org/10.1038/nsmb1178
↑ Mayer ML. Crystal structures of the GluR5 and GluR6 ligand binding cores: molecular mechanisms underlying kainate receptor selectivity. Neuron. 2005 Feb 17;45(4):539-52. PMID:15721240 doi:10.1016/j.neuron.2005.01.031

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1s7y"

Categories: Rattus norvegicus | Mayer, M L | Membrane protein

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1s7y]] is a 2 chain structure 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=1S7Y OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1S7Y FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GLU:GLUTAMIC+ACID'>GLU</scene><br>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GLU:GLUTAMIC+ACID'>GLU</scene></td></tr>
-<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1s50|1s50]], [[1ftj|1ftj]], [[1pb7|1pb7]], [[1ii5|1ii5]]</td></tr>
+<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1s50|1s50]], [[1ftj|1ftj]], [[1pb7|1pb7]], [[1ii5|1ii5]]</td></tr>
-<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GRIK2, GLUR6 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Rattus norvegicus])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GRIK2, GLUR6 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Rattus norvegicus])</td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1s7y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1s7y OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1s7y RCSB], [http://www.ebi.ac.uk/pdbsum/1s7y PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1s7y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1s7y OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1s7y RCSB], [http://www.ebi.ac.uk/pdbsum/1s7y PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/GRIK2_RAT GRIK2_RAT]] Ionotropic glutamate receptor. 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. May be involved in the transmission of light information from the retina to the hypothalamus. Modulates cell surface expression of NETO2 (By similarity).<ref>PMID:17486098</ref> <ref>PMID:17115050</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 34: / Line 36: @@
 </StructureSection>
 [[Category: Rattus norvegicus]]
-[[Category: Mayer, M L.]]
+[[Category: Mayer, M L]]
 [[Category: Membrane protein]]

1s7y

From Proteopedia

Revision as of 18:30, 25 December 2014

Crystal structure of the GluR6 ligand binding core in complex with glutamate at 1.75 A resolution orthorhombic form

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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