GluA2 bound to GYKI-52466 and Glutamate, Inhibited State 2

Experimental Data Snapshot

  • Resolution: 4.85 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

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Allosteric competition and inhibition in AMPA receptors.

Hale, W.D.Montano Romero, A.Gonzalez, C.U.Jayaraman, V.Lau, A.Y.Huganir, R.L.Twomey, E.C.

(2024) Nat Struct Mol Biol 

  • DOI: https://doi.org/10.1038/s41594-024-01328-0
  • Primary Citation of Related Structures:  
    8VJ6, 8VJ7

  • PubMed Abstract: 

    Excitatory neurotransmission is principally mediated by α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-subtype ionotropic glutamate receptors (AMPARs). Negative allosteric modulators are therapeutic candidates that inhibit AMPAR activation and can compete with positive modulators to control AMPAR function through unresolved mechanisms. Here we show that allosteric inhibition pushes AMPARs into a distinct state that prevents both activation and positive allosteric modulation. We used cryo-electron microscopy to capture AMPARs bound to glutamate, while a negative allosteric modulator, GYKI-52466, and positive allosteric modulator, cyclothiazide, compete for control of the AMPARs. GYKI-52466 binds in the ion channel collar and inhibits AMPARs by decoupling the ligand-binding domains from the ion channel. The rearrangement of the ligand-binding domains ruptures the cyclothiazide site, preventing positive modulation. Our data provide a framework for understanding allostery of AMPARs and for rational design of therapeutics targeting AMPARs in neurological diseases.

  • Organizational Affiliation

    Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Isoform Flip of Glutamate receptor 2
A, B, C, D
797Rattus norvegicusMutation(s): 0 
Gene Names: Gria2Glur2
Find proteins for P19491 (Rattus norvegicus)
Explore P19491 
Go to UniProtKB:  P19491
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19491
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 4.85 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Other privateKinship Foundation 22098168
Other privateDiana Helis Henry Medical Research Foundation 142548
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)United StatesMH112152
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesNS036715
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)United StatesMH132811

Revision History  (Full details and data files)

  • Version 1.0: 2024-06-05
    Type: Initial release
  • Version 1.1: 2024-06-19
    Changes: Database references