6NJM image
Entry Detail
PDB ID:
6NJM
EMDB ID:
Title:
Architecture and subunit arrangement of native AMPA receptors
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2019-01-03
Release Date:
2019-04-24
Method Details:
Experimental Method:
Resolution:
6.50 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Glutamate receptor 3
Chain IDs:A, C
Chain Length:888
Number of Molecules:2
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:Glutamate receptor 2
Chain IDs:B, D
Chain Length:883
Number of Molecules:2
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:A'-C' auxiliary proteins
Chain IDs:E, G
Chain Length:153
Number of Molecules:2
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:Voltage-dependent calcium channel gamma-2 subunit
Chain IDs:F, H
Chain Length:323
Number of Molecules:2
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:5B2 Fab Light Chain
Chain IDs:I, M
Chain Length:218
Number of Molecules:2
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:5B2 Fab Heavy Chain
Chain IDs:J, N
Chain Length:247
Number of Molecules:2
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:15F1 Fab light chain
Chain IDs:K, O
Chain Length:225
Number of Molecules:2
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Description:15F1 Fab heavy chain
Chain IDs:L, P
Chain Length:262
Number of Molecules:2
Biological Source:Mus musculus
Primary Citation
Architecture and subunit arrangement of native AMPA receptors elucidated by cryo-EM.
Science 364 355 362 (2019)
PMID: 30975770 DOI: 10.1126/science.aaw8250

Abstact

Glutamate-gated AMPA receptors mediate the fast component of excitatory signal transduction at chemical synapses throughout all regions of the mammalian brain. AMPA receptors are tetrameric assemblies composed of four subunits, GluA1-GluA4. Despite decades of study, the subunit composition, subunit arrangement, and molecular structure of native AMPA receptors remain unknown. Here we elucidate the structures of 10 distinct native AMPA receptor complexes by single-particle cryo-electron microscopy (cryo-EM). We find that receptor subunits are arranged nonstochastically, with the GluA2 subunit preferentially occupying the B and D positions of the tetramer and with triheteromeric assemblies comprising a major population of native AMPA receptors. Cryo-EM maps define the structure for S2-M4 linkers between the ligand-binding and transmembrane domains, suggesting how neurotransmitter binding is coupled to ion channel gating.

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