1LBC

Crystal structure of GluR2 ligand binding core (S1S2J-N775S) in complex with cyclothiazide (CTZ) as well as glutamate at 1.8 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mechanism of glutamate receptor desensitization.

Sun, Y.Olson, R.Horning, M.Armstrong, N.Mayer, M.Gouaux, E.

(2002) Nature 417: 245-253

  • DOI: 10.1038/417245a
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • 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 i ...

    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.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Columbia University, 650 West 168th Street, New York, New York 10032, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamine Receptor 2
A, B, C
263Rattus norvegicusMutation(s): 0 
Gene Names: GluR-2Gria2Glur2
Find proteins for P19491 (Rattus norvegicus)
Go to UniProtKB:  P19491
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CYZ
Query on CYZ

Download CCD File 
A, B, C
CYCLOTHIAZIDE
C14 H16 Cl N3 O4 S2
BOCUKUHCLICSIY-KSCJFIISSA-N
 Ligand Interaction
GLU
Query on GLU

Download CCD File 
A, B, C
GLUTAMIC ACID
C5 H9 N O4
WHUUTDBJXJRKMK-VKHMYHEASA-N
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
A, B, C
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CYZEC50:  2240   nM  BindingDB
GGLEC50:  2190   nM  BindingDB
GGLEC50:  35000   nM  BindingDB
GGLKi:  62   nM  BindingDB
GGLEC50:  1300   nM  BindingDB
GGLEC50:  21200   nM  BindingDB
GGLEC50:  71000   nM  BindingDB
GGLKi:  354   nM  BindingDB
GGLKi:  10000   nM  BindingDB
GGLKi:  336   nM  BindingDB
GGLEC50:  19600   nM  BindingDB
GGLEC50:  20000   nM  BindingDB
CYZEC50:  13700   nM  BindingDB
GGLEC50:  17000   nM  BindingDB
GGLKi:  500   nM  BindingDB
GGLKi:  940   nM  BindingDB
GGLKi:  1360   nM  BindingDB
GGLKi:  7400   nM  BindingDB
GGLEC50:  2260   nM  BindingDB
CYZEC50:  19800   nM  BindingDB
CYZEC50:  7600   nM  BindingDB
GGLEC50:  140000   nM  BindingDB
CYZEC50:  7600   nM  BindingDB
GGLKi:  249   nM  BindingDB
GGLKi:  254   nM  BindingDB
GGLEC50:  14000   nM  BindingDB
GGLEC50:  22000   nM  BindingDB
GGLEC50:  100000   nM  BindingDB
CYZEC50:  2000   nM  BindingDB
GGLEC50:  6200   nM  BindingDB
GGLEC50:  14700   nM  BindingDB
CYZEC50:  10000   nM  BindingDB
GGLKi:  89   nM  BindingDB
GGLEC50:  3660   nM  BindingDB
GGLEC50:  190000   nM  BindingDB
CYZEC50:  100000   nM  BindingDB
GGLEC50:  67000   nM  BindingDB
GGLKi:  280   nM  BindingDB
GGLKi:  282   nM  BindingDB
GGLEC50:  140000   nM  BindingDB
CYZEC50:  1000   nM  BindingDB
GGLEC50:  52000   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.222 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 114.859α = 90
b = 162.571β = 90
c = 47.198γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-05-29
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance