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: 1.8 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
  • Primary Citation of Related Structures:  
  • Also Cited By: 3TKD, 3TDJ, 3H6W, 3H6V, 3H6U, 3H6T

  • 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: Gria2 (Glur2)
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 SDF File 
Download CCD File 
A, B, C
CYCLOTHIAZIDE
3-BICYCLO[2.2.1]HEPT-5-EN-2-YL-6-CHLORO-3,4- DIHYDRO-2H-1,2,4-BENZOTHIADIAZINE-7-SULFONAMIDE 1,1 DIOXIDE
C14 H16 Cl N3 O4 S2
BOCUKUHCLICSIY-KSCJFIISSA-N
 Ligand Interaction
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
GLU
Query on GLU

Download SDF File 
Download CCD File 
A, B, C
GLUTAMIC ACID
C5 H9 N O4
WHUUTDBJXJRKMK-VKHMYHEASA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 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 = 90.00
b = 162.571β = 90.00
c = 47.198γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
AMoREphasing
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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