8C2H

Transmembrane domain of active state homomeric GluA1 AMPA receptor in tandem with TARP gamma 3


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.64 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 mobility tunes signalling of the GluA1 AMPA glutamate receptor.

Zhang, D.Ivica, J.Krieger, J.M.Ho, H.Yamashita, K.Stockwell, I.Baradaran, R.Cais, O.Greger, I.H.

(2023) Nature 621: 877-882

  • DOI: https://doi.org/10.1038/s41586-023-06528-0
  • Primary Citation of Related Structures:  
    8C1P, 8C1Q, 8C1R, 8C1S, 8C2H, 8C2I, 8P3Q, 8P3S, 8P3T, 8P3U, 8P3V, 8P3W, 8P3X, 8P3Y, 8P3Z, 8PIV

  • PubMed Abstract: 

    AMPA glutamate receptors (AMPARs), the primary mediators of excitatory neurotransmission in the brain, are either GluA2 subunit-containing and thus Ca 2+ -impermeable, or GluA2-lacking and Ca 2+ -permeable 1 . Despite their prominent expression throughout interneurons and glia, their role in long-term potentiation and their involvement in a range of neuropathologies 2 , structural information for GluA2-lacking receptors is currently absent. Here we determine and characterize cryo-electron microscopy structures of the GluA1 homotetramer, fully occupied with TARPγ3 auxiliary subunits (GluA1/γ3). The gating core of both resting and open-state GluA1/γ3 closely resembles GluA2-containing receptors. However, the sequence-diverse N-terminal domains (NTDs) give rise to a highly mobile assembly, enabling domain swapping and subunit re-alignments in the ligand-binding domain tier that are pronounced in desensitized states. These transitions underlie the unique kinetic properties of GluA1. A GluA2 mutant (F231A) increasing NTD dynamics phenocopies this behaviour, and exhibits reduced synaptic responses, reflecting the anchoring function of the AMPAR NTD at the synapse. Together, this work underscores how the subunit-diverse NTDs determine subunit arrangement, gating properties and ultimately synaptic signalling efficiency among AMPAR subtypes.


  • Organizational Affiliation

    Neurobiology Division, Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutamate receptor 1 flip isoform
A, B, C, D
915Rattus norvegicusMutation(s): 0 
Gene Names: Gria1Glur1
Membrane Entity: Yes 
UniProt
Find proteins for P19490 (Rattus norvegicus)
Explore P19490 
Go to UniProtKB:  P19490
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19490
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Voltage-dependent calcium channel gamma-3 subunit
E, F, G, H
314Rattus norvegicusMutation(s): 0 
Gene Names: Cacng3
Membrane Entity: Yes 
UniProt
Find proteins for Q8VHX0 (Rattus norvegicus)
Explore Q8VHX0 
Go to UniProtKB:  Q8VHX0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8VHX0
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
POV
Query on POV

Download Ideal Coordinates CCD File 
Q [auth E],
S [auth G]
(2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
C42 H82 N O8 P
WTJKGGKOPKCXLL-PFDVCBLKSA-N
OLC
Query on OLC

Download Ideal Coordinates CCD File 
J [auth A],
L [auth B],
N [auth C],
P [auth D]
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
C21 H40 O4
RZRNAYUHWVFMIP-GDCKJWNLSA-N
PLM
Query on PLM

Download Ideal Coordinates CCD File 
I [auth A]
K [auth B]
M [auth C]
O [auth D]
R [auth F]
I [auth A],
K [auth B],
M [auth C],
O [auth D],
R [auth F],
T [auth H]
PALMITIC ACID
C16 H32 O2
IPCSVZSSVZVIGE-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.64 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTREFMAC

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom223194/Z/21/Z
Medical Research Council (MRC, United Kingdom)United KingdomMC_U105174197

Revision History  (Full details and data files)

  • Version 1.0: 2023-08-30
    Type: Initial release
  • Version 1.1: 2023-09-13
    Changes: Database references
  • Version 1.2: 2023-09-20
    Changes: Database references
  • Version 1.3: 2023-10-11
    Changes: Database references