Activated GluA2 complex bound to glutamate, cyclothiazide, and STZ in digitonin

Experimental Data Snapshot

  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Channel opening and gating mechanism in AMPA-subtype glutamate receptors.

Twomey, E.C.Yelshanskaya, M.V.Grassucci, R.A.Frank, J.Sobolevsky, A.I.

(2017) Nature 549: 60-65

  • DOI: https://doi.org/10.1038/nature23479
  • Primary Citation of Related Structures:  
    5WEK, 5WEL, 5WEM, 5WEN, 5WEO

  • PubMed Abstract: 

    AMPA (α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid)-subtype ionotropic glutamate receptors mediate fast excitatory neurotransmission throughout the central nervous system. Gated by the neurotransmitter glutamate, AMPA receptors are critical for synaptic strength, and dysregulation of AMPA receptor-mediated signalling is linked to numerous neurological diseases. Here we use cryo-electron microscopy to solve the structures of AMPA receptor-auxiliary subunit complexes in the apo, antagonist- and agonist-bound states and determine the iris-like mechanism of ion channel opening. The ion channel selectivity filter is formed by the extended portions of the re-entrant M2 loops, while the helical portions of M2 contribute to extensive hydrophobic interfaces between AMPA receptor subunits in the ion channel. We show how the permeation pathway changes upon channel opening and identify conformational changes throughout the entire AMPA receptor that accompany activation and desensitization. Our findings provide a framework for understanding gating across the family of ionotropic glutamate receptors and the role of AMPA receptors in excitatory neurotransmission.

  • Organizational Affiliation

    Department of Biological Sciences, Columbia University, 650 West 168th Street, New York, New York 10032, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutamate receptor 2,Voltage-dependent calcium channel gamma-2 subunit chimera
A, B, C, D
1,034Rattus norvegicusMus musculus
This entity is chimeric
Mutation(s): 5 
Gene Names: Gria2Glur2Cacng2Stg
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P19491 (Rattus norvegicus)
Explore P19491 
Go to UniProtKB:  P19491
Find proteins for O88602 (Mus musculus)
Explore O88602 
Go to UniProtKB:  O88602
IMPC:  MGI:1316660
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsO88602P19491
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesNS093838
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesNS083660
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesCA206573
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM029169
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-02
    Type: Initial release
  • Version 1.1: 2017-09-13
    Changes: Author supporting evidence, Database references
  • Version 1.2: 2018-07-18
    Changes: Data collection, Experimental preparation
  • Version 1.3: 2019-11-20
    Changes: Author supporting evidence