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| - | {{Large structure}}
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| | ==Crystal structure of the GluK2/GluK5 (GluR6/KA2) ATD tetramer assembly== | | ==Crystal structure of the GluK2/GluK5 (GluR6/KA2) ATD tetramer assembly== |
| - | <StructureSection load='3qlv' size='340' side='right' caption='[[3qlv]], [[Resolution|resolution]] 3.94Å' scene=''> | + | <StructureSection load='3qlv' size='340' side='right'caption='[[3qlv]], [[Resolution|resolution]] 3.94Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3qlv]] is a 10 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QLV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3QLV FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3qlv]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QLV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3QLV FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3qlu|3qlu]], [[3qlt|3qlt]], [[3om0|3om0]], [[3h6g|3h6g]], [[3olz|3olz]]</td></tr> | + | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3qlu|3qlu]], [[3qlt|3qlt]], [[3om0|3om0]], [[3h6g|3h6g]], [[3olz|3olz]]</div></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Grik5 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat]), Glur6, Grik2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Grik5 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat]), Glur6, Grik2 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</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=3qlv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qlv OCA], [http://pdbe.org/3qlv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3qlv RCSB], [http://www.ebi.ac.uk/pdbsum/3qlv PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3qlv ProSAT]</span></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=3qlv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qlv OCA], [https://pdbe.org/3qlv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3qlv RCSB], [https://www.ebi.ac.uk/pdbsum/3qlv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3qlv ProSAT]</span></td></tr> |
| | </table> | | </table> |
| - | {{Large structure}} | |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GRIK5_RAT GRIK5_RAT]] Receptor for glutamate. L-glutamate acts as an excitatory neurotransmitter at many synapses in the central nervous system. The postsynaptic actions of Glu are mediated by a variety of receptors that are named according to their selective agonists. This receptor binds kainate > quisqualate > glutamate >> AMPA. [[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> | + | [[https://www.uniprot.org/uniprot/GRIK5_RAT GRIK5_RAT]] Receptor for glutamate. L-glutamate acts as an excitatory neurotransmitter at many synapses in the central nervous system. The postsynaptic actions of Glu are mediated by a variety of receptors that are named according to their selective agonists. This receptor binds kainate > quisqualate > glutamate >> AMPA. [[https://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> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[Ionotropic Glutamate Receptors|Ionotropic Glutamate Receptors]] | + | *[[Glutamate receptor 3D structures|Glutamate receptor 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Buffalo rat]] | | [[Category: Buffalo rat]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Kumar, J]] | | [[Category: Kumar, J]] |
| | [[Category: Mayer, M L]] | | [[Category: Mayer, M L]] |
| | [[Category: Glycosylation]] | | [[Category: Glycosylation]] |
| | [[Category: Membrane protein]] | | [[Category: Membrane protein]] |
| Structural highlights
Function
[GRIK5_RAT] Receptor for glutamate. L-glutamate acts as an excitatory neurotransmitter at many synapses in the central nervous system. The postsynaptic actions of Glu are mediated by a variety of receptors that are named according to their selective agonists. This receptor binds kainate > quisqualate > glutamate >> AMPA. [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]
Publication Abstract from PubMed
Native glutamate receptor ion channels are tetrameric assemblies containing two or more different subunits. NMDA receptors are obligate heteromers formed by coassembly of two or three divergent gene families. While some AMPA and kainate receptors can form functional homomeric ion channels, the KA1 and KA2 subunits are obligate heteromers which function only in combination with GluR5-7. The mechanisms controlling glutamate receptor assembly involve an initial step in which the amino terminal domains (ATD) assemble as dimers. Here, we establish by sedimentation velocity that the ATDs of GluR6 and KA2 coassemble as a heterodimer of K(d) 11 nM, 32,000-fold lower than the K(d) for homodimer formation by KA2; we solve crystal structures for the GluR6/KA2 ATD heterodimer and heterotetramer assemblies. Using these structures as a guide, we perform a mutant cycle analysis to probe the energetics of assembly and show that high-affinity ATD interactions are required for biosynthesis of functional heteromeric receptors.
Structure and assembly mechanism for heteromeric kainate receptors.,Kumar J, Schuck P, Mayer ML Neuron. 2011 Jul 28;71(2):319-31. PMID:21791290[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
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
- ↑ Kumar J, Schuck P, Mayer ML. Structure and assembly mechanism for heteromeric kainate receptors. Neuron. 2011 Jul 28;71(2):319-31. PMID:21791290 doi:http://dx.doi.org/10.1016/j.neuron.2011.05.038
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