GluA2-1xGSG1L bound to ZK

Experimental Data Snapshot

  • Resolution: 8.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Structural Bases of Desensitization in AMPA Receptor-Auxiliary Subunit Complexes.

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

(2017) Neuron 94: 569-580.e5

  • DOI: https://doi.org/10.1016/j.neuron.2017.04.025
  • Primary Citation of Related Structures:  
    5VHW, 5VHX, 5VHY, 5VHZ

  • PubMed Abstract: 

    Fast excitatory neurotransmission is mediated by AMPA-subtype ionotropic glutamate receptors (AMPARs). AMPARs, localized at post-synaptic densities, are regulated by transmembrane auxiliary subunits that modulate AMPAR assembly, trafficking, gating, and pharmacology. Aberrancies in AMPAR-mediated signaling are associated with numerous neurological disorders. Here, we report cryo-EM structures of an AMPAR in complex with the auxiliary subunit GSG1L in the closed and desensitized states. GSG1L favors the AMPAR desensitized state, where channel closure is facilitated by profound structural rearrangements in the AMPAR extracellular domain, with ligand-binding domain dimers losing their local 2-fold rotational symmetry. Our structural and functional experiments suggest that AMPAR auxiliary subunits share a modular architecture and use a common transmembrane scaffold for distinct extracellular modules to differentially regulate AMPAR gating. By comparing the AMPAR-GSG1L complex structures, we map conformational changes accompanying AMPAR recovery from desensitization and reveal structural bases for regulation of synaptic transmission by auxiliary subunits.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Columbia University, 650 West 168(th) Street, New York, NY 10032, USA; Integrated Program in Cellular, Molecular, and Biomedical Studies, Columbia University, 650 West 168(th) Street, New York, NY 10032, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutamate receptor 2,Germ cell-specific gene 1-like protein
A, B, C, D, E
1,057Rattus norvegicusMutation(s): 0 
Gene Names: Gria2Glur2Gsg1l
Membrane Entity: Yes 
Find proteins for P19491 (Rattus norvegicus)
Explore P19491 
Go to UniProtKB:  P19491
Find proteins for D3ZK93 (Rattus norvegicus)
Explore D3ZK93 
Go to UniProtKB:  D3ZK93
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsD3ZK93P19491
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 8.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-05-03
    Type: Initial release
  • Version 1.1: 2017-05-17
    Changes: Database references
  • Version 1.2: 2017-11-08
    Changes: Data collection, Experimental preparation
  • Version 1.3: 2019-11-06
    Changes: Advisory, Data collection, Derived calculations, Other, Structure summary
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary