5VHX

GluA2-1xGSG1L bound to ZK


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.3 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

Literature

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: 10.1016/j.neuron.2017.04.025
  • Primary Citation of Related Structures:  

  • 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, ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamate receptor 2,Germ cell-specific gene 1-like protein
A, B, C, D, E
1057Rattus norvegicusMutation(s): 0 
Gene Names: Gria2 (Glur2), Gsg1l
Find proteins for P19491 (Rattus norvegicus)
Go to UniProtKB:  P19491
Find proteins for D3ZK93 (Rattus norvegicus)
Go to UniProtKB:  D3ZK93
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZK1
Query on ZK1

Download SDF File 
Download CCD File 
A, B, C, D
{[7-morpholin-4-yl-2,3-dioxo-6-(trifluoromethyl)-3,4-dihydroquinoxalin-1(2H)-yl]methyl}phosphonic acid
[[3,4-Dihydro-7-(4-morpholinyl)-2,3-dioxo-6-(trifluorom ethyl)-1(2H)-quinoxalinyl]methyl]phosphonic acid
C14 H15 F3 N3 O6 P
WZMQMKNCWDCCMT-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C, D
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.3 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: 2017-05-03
    Type: Initial release
  • Version 1.1: 2017-05-17
    Type: Database references
  • Version 1.2: 2017-11-08
    Type: Data collection, Experimental preparation
  • Version 1.3: 2019-11-06
    Type: Advisory, Data collection, Derived calculations, Other, Structure summary