1MQI

Crystal Structure of the GluR2 Ligand Binding Core (S1S2J) in Complex with Fluoro-Willardiine at 1.35 Angstroms Resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis for partial agonist action at ionotropic glutamate receptors

Jin, R.Banke, T.G.Mayer, M.L.Traynelis, S.F.Gouaux, E.

(2003) Nat Neurosci 6: 803-810

  • DOI: 10.1038/nn1091
  • Primary Citation of Related Structures:  
    1MQG, 1MQH, 1MQI, 1MQJ

  • PubMed Abstract: 
  • An unresolved problem in understanding neurotransmitter receptor function concerns the mechanism(s) by which full and partial agonists elicit different amplitude responses at equal receptor occupancy. The widely held view of 'partial agonism' posits that resting and active states of the receptor are in equilibrium, and partial agonists simply do not shift the equilibrium toward the active state as efficaciously as full agonists ...

    An unresolved problem in understanding neurotransmitter receptor function concerns the mechanism(s) by which full and partial agonists elicit different amplitude responses at equal receptor occupancy. The widely held view of 'partial agonism' posits that resting and active states of the receptor are in equilibrium, and partial agonists simply do not shift the equilibrium toward the active state as efficaciously as full agonists. Here we report findings from crystallographic and electrophysiological studies of the mechanism of activation of an AMPA-subtype glutamate receptor ion channel. In these experiments, we used 5-substituted willardiines, a series of partial agonists that differ by only a single atom. Our results show that the GluR2 ligand-binding core can adopt a range of ligand-dependent conformational states, which in turn control the open probability of discrete subconductance states of the intact ion channel. Our findings thus provide a structure-based model of partial agonism.


    Related Citations: 
    • Mechanisms for activation and antagonism of an AMPA-sensitive glutamate receptor: Crystal structures of the GluR2 ligand binding core
      Armstrong, N., Gouaux, E.
      (2000) Neuron 28: 165

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
glutamate receptor 2A263Rattus norvegicusMutation(s): 0 
Gene Names: GluR-2 or GluR-B
UniProt
Find proteins for P19491 (Rattus norvegicus)
Explore P19491 
Go to UniProtKB:  P19491
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FWD (Subject of Investigation/LOI)
Query on FWD

Download Ideal Coordinates CCD File 
B [auth A]2-AMINO-3-(5-FLUORO-2,4-DIOXO-3,4-DIHYDRO-2H-PYRIMIDIN-1-YL)-PROPIONIC ACID
C7 H8 F N3 O4
DBWPFHJYSTVBCZ-BYPYZUCNSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
FWD BindingDB:  1MQI Ki: min: 4, max: 1.00e+4 (nM) from 8 assay(s)
EC50: min: 380, max: 2.09e+4 (nM) from 6 assay(s)
PDBBind:  1MQI IC50: 23.53 (nM) from 1 assay(s)
Binding MOAD:  1MQI IC50: 23.53 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.913α = 90
b = 91.431β = 90
c = 48.286γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-08-05
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-08-02
    Changes: Refinement description, Source and taxonomy