5VOT

Structure of AMPA receptor-TARP complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.6 of the entry. See complete history

Literature

Activation and Desensitization Mechanism of AMPA Receptor-TARP Complex by Cryo-EM.

Chen, S.Zhao, Y.Wang, Y.Shekhar, M.Tajkhorshid, E.Gouaux, E.

(2017) Cell 170: 1234-1246.e14

  • DOI: 10.1016/j.cell.2017.07.045
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • AMPA receptors mediate fast excitatory neurotransmission in the mammalian brain and transduce the binding of presynaptically released glutamate to the opening of a transmembrane cation channel. Within the postsynaptic density, however, AMPA receptors ...

    AMPA receptors mediate fast excitatory neurotransmission in the mammalian brain and transduce the binding of presynaptically released glutamate to the opening of a transmembrane cation channel. Within the postsynaptic density, however, AMPA receptors coassemble with transmembrane AMPA receptor regulatory proteins (TARPs), yielding a receptor complex with altered gating kinetics, pharmacology, and pore properties. Here, we elucidate structures of the GluA2-TARP γ2 complex in the presence of the partial agonist kainate or the full agonist quisqualate together with a positive allosteric modulator or with quisqualate alone. We show how TARPs sculpt the ligand-binding domain gating ring, enhancing kainate potency and diminishing the ensemble of desensitized states. TARPs encircle the receptor ion channel, stabilizing M2 helices and pore loops, illustrating how TARPs alter receptor pore properties. Structural and computational analysis suggests the full agonist and modulator complex harbors an ion-permeable channel gate, providing the first view of an activated AMPA receptor.


    Organizational Affiliation

    NIH Center for Macromolecular Modeling and Bioinformatics, Department of Biochemistry, Center for Biophysics and Quantitative Biology, and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.,Vollum Institute, Oregon Health & Science University, Portland, OR 97239, USA.,Vollum Institute, Oregon Health & Science University, Portland, OR 97239, USA; Howard Hughes Medical Institute, Oregon Health & Science University, Portland, OR 97239, USA. Electronic address: gouauxe@ohsu.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamate receptor 2
A, C, D, B
889Rattus norvegicusMutation(s): 0 
Gene Names: Gria2 (Glur2)
Find proteins for P19491 (Rattus norvegicus)
Go to UniProtKB:  P19491
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Voltage-dependent calcium channel gamma-2 subunit
E, F, G, H
323Rattus norvegicusMutation(s): 0 
Gene Names: Cacng2 (Stg)
Find proteins for Q71RJ2 (Rattus norvegicus)
Go to UniProtKB:  Q71RJ2
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesNS-038631
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP41-GM104601
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesU54-GM087519

Revision History 

  • Version 1.0: 2017-07-12
    Type: Initial release
  • Version 1.1: 2017-09-20
    Type: Author supporting evidence, Data collection
  • Version 1.2: 2017-10-04
    Type: Database references
  • Version 1.3: 2017-11-08
    Type: Derived calculations
  • Version 1.4: 2018-07-18
    Type: Data collection
  • Version 1.5: 2019-11-06
    Type: Data collection, Other, Structure summary
  • Version 1.6: 2019-12-18
    Type: Author supporting evidence