1lb9: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
[[Image:1lb9.jpg|left|200px]] | [[Image:1lb9.jpg|left|200px]] | ||
'''Crystal structure of the Non-desensitizing GluR2 ligand binding core mutant (S1S2J-L483Y) in complex with antagonist DNQX at 2.3 A resolution''' | {{Structure | ||
|PDB= 1lb9 |SIZE=350|CAPTION= <scene name='initialview01'>1lb9</scene>, resolution 2.30Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> and <scene name='pdbligand=DNQ:6,7-DINITROQUINOXALINE-2,3-DIONE'>DNQ</scene> | |||
|ACTIVITY= | |||
|GENE= GluR-2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Rattus norvegicus]) | |||
}} | |||
'''Crystal structure of the Non-desensitizing GluR2 ligand binding core mutant (S1S2J-L483Y) in complex with antagonist DNQX at 2.3 A resolution''' | |||
==Overview== | ==Overview== | ||
| Line 7: | Line 16: | ||
==About this Structure== | ==About this Structure== | ||
1LB9 is a [ | 1LB9 is a [[Single protein]] structure of 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=1LB9 OCA]. | ||
==Reference== | ==Reference== | ||
Mechanism of glutamate receptor desensitization., Sun Y, Olson R, Horning M, Armstrong N, Mayer M, Gouaux E, Nature. 2002 May 16;417(6886):245-53. PMID:[http:// | Mechanism of glutamate receptor desensitization., Sun Y, Olson R, Horning M, Armstrong N, Mayer M, Gouaux E, Nature. 2002 May 16;417(6886):245-53. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12015593 12015593] | ||
[[Category: Rattus norvegicus]] | [[Category: Rattus norvegicus]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| Line 31: | Line 40: | ||
[[Category: s1s2]] | [[Category: s1s2]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:28:49 2008'' | ||
Revision as of 13:28, 20 March 2008
| |||||||
| , resolution 2.30Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | and | ||||||
| Gene: | GluR-2 (Rattus norvegicus) | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of the Non-desensitizing GluR2 ligand binding core mutant (S1S2J-L483Y) in complex with antagonist DNQX at 2.3 A resolution
OverviewOverview
Ligand-gated ion channels transduce chemical signals into electrical impulses by opening a transmembrane pore in response to binding one or more neurotransmitter molecules. After activation, many ligand-gated ion channels enter a desensitized state in which the neurotransmitter remains bound but the ion channel is closed. Although receptor desensitization is crucial to the functioning of many ligand-gated ion channels in vivo, the molecular basis of this important process has until now defied analysis. Using the GluR2 AMPA-sensitive glutamate receptor, we show here that the ligand-binding cores form dimers and that stabilization of the intradimer interface by either mutations or allosteric modulators reduces desensitization. Perturbations that destabilize the interface enhance desensitization. Receptor activation involves conformational changes within each subunit that result in an increase in the separation of portions of the receptor that are linked to the ion channel. Our analysis defines the dimer interface in the resting and activated state, indicates how ligand binding is coupled to gating, and suggests modes of dimer dimer interaction in the assembled tetramer. Desensitization occurs through rearrangement of the dimer interface, which disengages the agonist-induced conformational change in the ligand-binding core from the ion channel gate.
About this StructureAbout this Structure
1LB9 is a Single protein structure of sequence from Rattus norvegicus. Full crystallographic information is available from OCA.
ReferenceReference
Mechanism of glutamate receptor desensitization., Sun Y, Olson R, Horning M, Armstrong N, Mayer M, Gouaux E, Nature. 2002 May 16;417(6886):245-53. PMID:12015593
Page seeded by OCA on Thu Mar 20 12:28:49 2008