Structure of GluA2-N775S ligand-binding domain (S1S2J) in complex with glutamate and Rubidium Bromide at 1.75 A resolution

Experimental Data Snapshot

  • Resolution: 1.75 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 

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Nanoscale Mobility of the Apo State and TARP Stoichiometry Dictate the Gating Behavior of Alternatively Spliced AMPA Receptors.

Dawe, G.B.Kadir, M.F.Venskutonyte, R.Perozzo, A.M.Yan, Y.Alexander, R.P.D.Navarrete, C.Santander, E.A.Arsenault, M.Fuentes, C.Aurousseau, M.R.P.Frydenvang, K.Barrera, N.P.Kastrup, J.S.Edwardson, J.M.Bowie, D.

(2019) Neuron 102: 976

  • DOI: https://doi.org/10.1016/j.neuron.2019.03.046
  • Primary Citation of Related Structures:  
    6GIV, 6GL4

  • PubMed Abstract: 

    Neurotransmitter-gated ion channels are allosteric proteins that switch on and off in response to agonist binding. Most studies have focused on the agonist-bound, activated channel while assigning a lesser role to the apo or resting state. Here, we show that nanoscale mobility of resting α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-type ionotropic glutamate receptors (AMPA receptors) predetermines responsiveness to neurotransmitter, allosteric anions and TARP auxiliary subunits. Mobility at rest is regulated by alternative splicing of the flip/flop cassette of the ligand-binding domain, which controls motions in the distant AMPA receptor N-terminal domain (NTD). Flip variants promote moderate NTD movement, which establishes slower channel desensitization and robust regulation by anions and auxiliary subunits. In contrast, greater NTD mobility imparted by the flop cassette acts as a master switch to override allosteric regulation. In AMPA receptor heteromers, TARP stoichiometry further modifies these actions of the flip/flop cassette generating two functionally distinct classes of partially and fully TARPed receptors typical of cerebellar stellate and Purkinje cells.

  • 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutamate receptor 2264Rattus norvegicusMutation(s): 1 
Gene Names: Gria2Glur2
Find proteins for P19491 (Rattus norvegicus)
Explore P19491 
Go to UniProtKB:  P19491
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19491
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.75 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.956α = 90
b = 47.513β = 110.16
c = 49.81γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-15
    Type: Initial release
  • Version 1.1: 2019-06-19
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description