5FTH

Crystal structure of the GluA2 K738M-T744K LBD in complex with glutamate (zinc form)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.243 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Distinct Structural Pathways Coordinate the Activation of Ampa Receptor-Auxiliary Subunit Complexes.

Dawe, G.B.Musgaard, M.Aurousseau, M.R.P.Nayeem, N.Green, T.Biggin, P.C.Bowie, D.

(2016) Neuron 89: 1264

  • DOI: 10.1016/j.neuron.2016.01.038
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Neurotransmitter-gated ion channels adopt different gating modes to fine-tune signaling at central synapses. At glutamatergic synapses, high and low activity of AMPA receptors (AMPARs) is observed when pore-forming subunits coassemble with or without ...

    Neurotransmitter-gated ion channels adopt different gating modes to fine-tune signaling at central synapses. At glutamatergic synapses, high and low activity of AMPA receptors (AMPARs) is observed when pore-forming subunits coassemble with or without auxiliary subunits, respectively. Whether a common structural pathway accounts for these different gating modes is unclear. Here, we identify two structural motifs that determine the time course of AMPAR channel activation. A network of electrostatic interactions at the apex of the AMPAR ligand-binding domain (LBD) is essential for gating by pore-forming subunits, whereas a conserved motif on the lower, D2 lobe of the LBD prolongs channel activity when auxiliary subunits are present. Accordingly, channel activity is almost entirely abolished by elimination of the electrostatic network but restored via auxiliary protein interactions at the D2 lobe. In summary, we propose that activation of native AMPAR complexes is coordinated by distinct structural pathways, favored by the association/dissociation of auxiliary subunits.


    Organizational Affiliation

    Integrated Program in Neuroscience, McGill University, Montréal, QC H3A 2B4, Canada; Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 1Y6, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUTAMATE RECEPTOR 2
A, B, C
291Rattus norvegicusMutation(s): 5 
Gene Names: Gria2 (Glur2)
Find proteins for P19491 (Rattus norvegicus)
Go to UniProtKB:  P19491
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
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: 2.9 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.243 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.375α = 90.00
b = 110.523β = 90.00
c = 167.245γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHENIXrefinement
REFMACphasing
PHENIXphasing
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-01-13 
  • Released Date: 2016-02-03 
  • Deposition Author(s): Nayeem, N., Green, T.

Revision History 

  • Version 1.0: 2016-02-03
    Type: Initial release
  • Version 1.1: 2016-03-16
    Type: Database references
  • Version 1.2: 2016-03-30
    Type: Database references