1GR2

STRUCTURE OF A GLUTAMATE RECEPTOR LIGAND BINDING CORE (GLUR2) COMPLEXED WITH KAINATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of a glutamate-receptor ligand-binding core in complex with kainate.

Armstrong, N.Sun, Y.Chen, G.Q.Gouaux, E.

(1998) Nature 395: 913-917

  • DOI: 10.1038/27692
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Ionotropic glutamate receptors (iGluRs) mediate excitatory synaptic transmission in vertebrates and invertebrates through ligand-induced opening of transmembrane ion channels. iGluRs are segregated into three subtypes according to their sensitivity t ...

    Ionotropic glutamate receptors (iGluRs) mediate excitatory synaptic transmission in vertebrates and invertebrates through ligand-induced opening of transmembrane ion channels. iGluRs are segregated into three subtypes according to their sensitivity to the agonists AMPA (alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid), kainate (a structural analogue of glutamate) or NMDA (N-methyl-D-aspartate). iGluRs are important in the development and function of the nervous system, are essential in memory and learning, and are either implicated in or have causal roles in dysfunctions ranging from Alzheimer's, Parkinson's and Huntington's diseases, schizophrenia, epilepsy and Rasmussen's encephalitis to stroke. Development of iGluR agonists and antagonists has been hampered by a lack of high-resolution structural information. Here we describe the crystal structure of an iGluR ligand-binding region in a complex with the neurotoxin (agonist) kainate. The bilobed structure shows the determinants of receptor-agonist interactions and how ligand-binding specificity and affinity are altered by remote residues and the redox state of the conserved disulphide bond. The structure indicates mechanisms for allosteric effector action and for ligand-induced channel gating. The information provided by this structure will be essential in designing new ligands.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York 10032, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (GLUTAMATE RECEPTOR 2)
A
279Rattus norvegicusMutation(s): 0 
Gene Names: Gria2
Find proteins for P19491 (Rattus norvegicus)
Go to UniProtKB:  P19491
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
KAI
Query on KAI

Download CCD File 
A
3-(CARBOXYMETHYL)-4-ISOPROPENYLPROLINE
C10 H15 N O4
VLSMHEGGTFMBBZ-OOZYFLPDSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
KAIKi:  3690   nM  BindingDB
KAIKi:  1.7999999523162842   nM  BindingDB
KAIEC50:  10570   nM  BindingDB
KAIKi:  5780   nM  BindingDB
KAIKi:  12200   nM  BindingDB
KAIKi:  12221   nM  BindingDB
KAIEC50:  31000   nM  BindingDB
KAIEC50:  380000   nM  BindingDB
KAIEC50:  40000   nM  BindingDB
KAIKi:  477   nM  BindingDB
KAIKi:  8050   nM  BindingDB
KAIEC50:  47000   nM  BindingDB
KAIKi:  1980   nM  BindingDB
KAIEC50:  26610   nM  BindingDB
KAIEC50:  23000   nM  BindingDB
KAIEC50:  27000   nM  BindingDB
KAIKi:  6300   nM  BindingDB
KAIKi:  2630   nM  BindingDB
KAIKi:  3570   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.22α = 90
b = 63.07β = 92.99
c = 46.32γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
X-PLORrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-12-09
    Type: Initial release
  • Version 1.1: 2008-04-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-08-16
    Changes: Refinement description, Source and taxonomy