5IDE

Cryo-EM structure of GluA2/3 AMPA receptor heterotetramer (model I)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.25 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history

Literature

Structure and organization of heteromeric AMPA-type glutamate receptors.

Herguedas, B.Garcia-Nafria, J.Cais, O.Fernandez-Leiro, R.Krieger, J.Ho, H.Greger, I.H.

(2016) Science 352: aad3873-aad3873

  • DOI: 10.1126/science.aad3873
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • AMPA-type glutamate receptors (AMPARs), which are central mediators of rapid neurotransmission and synaptic plasticity, predominantly exist as heteromers of the subunits GluA1 to GluA4. Here we report the first AMPAR heteromer structures, which devia ...

    AMPA-type glutamate receptors (AMPARs), which are central mediators of rapid neurotransmission and synaptic plasticity, predominantly exist as heteromers of the subunits GluA1 to GluA4. Here we report the first AMPAR heteromer structures, which deviate substantially from existing GluA2 homomer structures. Crystal structures of the GluA2/3 and GluA2/4 N-terminal domains reveal a novel compact conformation with an alternating arrangement of the four subunits around a central axis. This organization is confirmed by cysteine cross-linking in full-length receptors, and it permitted us to determine the structure of an intact GluA2/3 receptor by cryogenic electron microscopy. Two models in the ligand-free state, at resolutions of 8.25 and 10.3 angstroms, exhibit substantial vertical compression and close associations between domain layers, reminiscent of N-methyl-D-aspartate receptors. Model 1 resembles a resting state and model 2 a desensitized state, thus providing snapshots of gating transitions in the nominal absence of ligand. Our data reveal organizational features of heteromeric AMPARs and provide a framework to decipher AMPAR architecture and signaling.


    Organizational Affiliation

    Neurobiology Division, MRC Laboratory of Molecular Biology, Cambridge, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamate receptor 2
A, C
872Rattus norvegicusMutation(s): 1 
Gene Names: Gria2 (Glur2)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Other Ion Channels
Protein: 
GluA2 Glutamate receptor (AMPA-subtype)
Find proteins for P19491 (Rattus norvegicus)
Go to UniProtKB:  P19491
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Glutamate receptor 3
B, D
874Rattus norvegicusMutation(s): 2 
Gene Names: Gria3 (Glur3)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Other Ion Channels
Protein: 
GluA2 Glutamate receptor (AMPA-subtype)
Find proteins for P19492 (Rattus norvegicus)
Go to UniProtKB:  P19492
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.25 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-16
    Type: Initial release
  • Version 1.1: 2016-03-23
    Type: Database references
  • Version 1.2: 2016-05-11
    Type: Database references
  • Version 1.3: 2016-06-15
    Type: Database references
  • Version 1.4: 2017-08-30
    Type: Data collection
  • Version 1.5: 2017-10-11
    Type: Source and taxonomy