5FTI

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.162 

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
  • Structures With Same Primary Citation

  • 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

    Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 1Y6, Canada. Electronic address: derek.bowie@mcgill.ca.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUTAMATE RECEPTOR 2
A, B
291Rattus norvegicusMutation(s): 5 
Gene Names: Gria2Glur2
Find proteins for P19491 (Rattus norvegicus)
Go to UniProtKB:  P19491
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLU
Query on GLU

Download CCD File 
A, B
GLUTAMIC ACID
C5 H9 N O4
WHUUTDBJXJRKMK-VKHMYHEASA-N
 Ligand Interaction
SO4
Query on SO4

Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A, B
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
LI
Query on LI

Download CCD File 
A, B
LITHIUM ION
Li
HBBGRARXTFLTSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.162 
  • Space Group: P 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.316α = 90
b = 47.562β = 95.65
c = 96.754γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report



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
    Changes: Database references
  • Version 1.2: 2016-03-30
    Changes: Database references