3qlt

From Proteopedia

(Difference between revisions)

Revision as of 08:08, 11 January 2023

Crystal structure of a GluK2 (GluR6) glycan wedge homodimer assembly

Structural highlights

3qlt 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:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

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]

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.

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

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3qlt"

Categories: Large Structures | Rattus norvegicus | Kumar J | Mayer ML

@@ Line 3: / Line 3: @@
 <StructureSection load='3qlt' size='340' side='right'caption='[[3qlt]], [[Resolution|resolution]] 2.99&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3qlt]] is a 2 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=3QLT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3QLT FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3qlt]] 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=3QLT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3QLT FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></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]], [[3qlv|3qlv]], [[3om0|3om0]], [[3h6g|3h6g]], [[3olz|3olz]]</div></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">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'>[https://proteopedia.org/fgij/fg.htm?mol=3qlt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qlt OCA], [https://pdbe.org/3qlt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3qlt RCSB], [https://www.ebi.ac.uk/pdbsum/3qlt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3qlt ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[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>
+[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;">
 == Publication Abstract from PubMed ==
@@ Line 27: / Line 25: @@
 __TOC__
 </StructureSection>
-[[Category: Buffalo rat]]
 [[Category: Large Structures]]
-[[Category: Kumar, J]]
+[[Category: Rattus norvegicus]]
-[[Category: Mayer, M L]]
+[[Category: Kumar J]]
-[[Category: Glycosylation]]
+[[Category: Mayer ML]]
-[[Category: Membrane protein]]

3qlt

From Proteopedia

Revision as of 08:08, 11 January 2023

Crystal structure of a GluK2 (GluR6) glycan wedge homodimer assembly

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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