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- PDB-6njm: Architecture and subunit arrangement of native AMPA receptors -

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Basic information

Entry
Database: PDB / ID: 6njm
TitleArchitecture and subunit arrangement of native AMPA receptors
Components
  • (Glutamate receptor ...) x 2
  • 15F1 Fab heavy chain
  • 15F1 Fab light chain
  • 5B2 Fab Heavy Chain
  • 5B2 Fab Light Chain
  • A'-C' auxiliary proteins
  • Voltage-dependent calcium channel gamma-2 subunit
KeywordsMEMBRANE PROTEIN/Immune System / AMPA receptor / ligand gated ion channel / neurotransmitter / synapse / MEMBRANE PROTEIN / MEMBRANE PROTEIN-Immune System complex
Function / homology
Function and homology information


Presynaptic depolarization and calcium channel opening / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / LGI-ADAM interactions / postsynaptic neurotransmitter receptor diffusion trapping / Trafficking of AMPA receptors / channel regulator activity / regulation of AMPA receptor activity / membrane hyperpolarization ...Presynaptic depolarization and calcium channel opening / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / LGI-ADAM interactions / postsynaptic neurotransmitter receptor diffusion trapping / Trafficking of AMPA receptors / channel regulator activity / regulation of AMPA receptor activity / membrane hyperpolarization / nervous system process / Synaptic adhesion-like molecules / protein targeting to membrane / voltage-gated calcium channel complex / spine synapse / neurotransmitter receptor localization to postsynaptic specialization membrane / protein heterotetramerization / dendritic spine neck / neuromuscular junction development / dendritic spine head / parallel fiber to Purkinje cell synapse / Activation of AMPA receptors / perisynaptic space / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity / transmission of nerve impulse / immunoglobulin binding / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / kainate selective glutamate receptor activity / AMPA glutamate receptor complex / cellular response to glycine / extracellularly glutamate-gated ion channel activity / ionotropic glutamate receptor complex / membrane depolarization / asymmetric synapse / regulation of receptor recycling / Unblocking of NMDA receptors, glutamate binding and activation / glutamate receptor binding / positive regulation of synaptic transmission / synaptic cleft / regulation of postsynaptic membrane neurotransmitter receptor levels / voltage-gated calcium channel activity / response to fungicide / regulation of synaptic transmission, glutamatergic / glutamate-gated receptor activity / cytoskeletal protein binding / ionotropic glutamate receptor binding / extracellular ligand-gated monoatomic ion channel activity / presynaptic active zone membrane / somatodendritic compartment / cellular response to brain-derived neurotrophic factor stimulus / glutamate-gated calcium ion channel activity / dendrite cytoplasm / dendrite membrane / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / calcium channel regulator activity / ionotropic glutamate receptor signaling pathway / positive regulation of synaptic transmission, glutamatergic / SNARE binding / hippocampal mossy fiber to CA3 synapse / dendritic shaft / regulation of membrane potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / synaptic transmission, glutamatergic / PDZ domain binding / protein tetramerization / establishment of protein localization / synaptic membrane / modulation of chemical synaptic transmission / postsynaptic density membrane / terminal bouton / cerebral cortex development / Schaffer collateral - CA1 synapse / receptor internalization / long-term synaptic potentiation / response to calcium ion / synaptic vesicle membrane / synaptic vesicle / presynapse / signaling receptor activity / amyloid-beta binding / presynaptic membrane / growth cone / scaffold protein binding / protein homotetramerization / chemical synaptic transmission / perikaryon / dendritic spine / postsynaptic membrane / neuron projection / postsynaptic density / axon / neuronal cell body / synapse / dendrite / protein-containing complex binding / protein kinase binding / glutamatergic synapse / cell surface
Similarity search - Function
Voltage-dependent calcium channel, gamma-2 subunit / : / PMP-22/EMP/MP20/Claudin family / Voltage-dependent calcium channel, gamma subunit / PMP-22/EMP/MP20/Claudin superfamily / Ionotropic glutamate receptor, metazoa / Ligated ion channel L-glutamate- and glycine-binding site / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site / Ligand-gated ion channel ...Voltage-dependent calcium channel, gamma-2 subunit / : / PMP-22/EMP/MP20/Claudin family / Voltage-dependent calcium channel, gamma subunit / PMP-22/EMP/MP20/Claudin superfamily / Ionotropic glutamate receptor, metazoa / Ligated ion channel L-glutamate- and glycine-binding site / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site / Ligand-gated ion channel / : / Ionotropic glutamate receptor / Eukaryotic homologues of bacterial periplasmic substrate binding proteins. / Receptor, ligand binding region / Receptor family ligand binding region / Periplasmic binding protein-like I
Similarity search - Domain/homology
Chem-ZK1 / Glutamate receptor 2 / Glutamate receptor 3 / Voltage-dependent calcium channel gamma-2 subunit
Similarity search - Component
Biological speciesMus musculus (house mouse)
Rattus norvegicus (Norway rat)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 6.5 Å
AuthorsGouaux, E. / Zhao, Y.
CitationJournal: Science / Year: 2019
Title: Architecture and subunit arrangement of native AMPA receptors elucidated by cryo-EM.
Authors: Yan Zhao / Shanshuang Chen / Adam C Swensen / Wei-Jun Qian / Eric Gouaux /
Abstract: 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 ...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.
History
DepositionJan 3, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Apr 24, 2019Provider: repository / Type: Initial release
Revision 1.1May 8, 2019Group: Data collection / Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / em_entity_assembly / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _chem_comp.type / _em_entity_assembly.entity_id_list / _pdbx_struct_assembly_gen.asym_id_list / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1May 5, 2021Group: Structure summary / Category: chem_comp / struct / Item: _chem_comp.pdbx_synonyms / _struct.title
Revision 3.0Dec 25, 2024Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Database references / Derived calculations / Structure summary
Category: atom_site / chem_comp_atom ...atom_site / chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature / pdbx_nonpoly_scheme / pdbx_validate_close_contact / struct_conn
Item: _atom_site.auth_seq_id / _database_2.pdbx_DOI ..._atom_site.auth_seq_id / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update / _pdbx_nonpoly_scheme.pdb_seq_num

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Structure visualization

Movie
  • Deposited structure unit
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  • Superimposition on EM map
  • EMDB-9388
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Structure viewerMolecule:
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Assembly

Deposited unit
A: Glutamate receptor 3
B: Glutamate receptor 2
C: Glutamate receptor 3
D: Glutamate receptor 2
E: A'-C' auxiliary proteins
F: Voltage-dependent calcium channel gamma-2 subunit
G: A'-C' auxiliary proteins
H: Voltage-dependent calcium channel gamma-2 subunit
I: 5B2 Fab Light Chain
J: 5B2 Fab Heavy Chain
K: 15F1 Fab light chain
L: 15F1 Fab heavy chain
M: 5B2 Fab Light Chain
N: 5B2 Fab Heavy Chain
O: 15F1 Fab light chain
P: 15F1 Fab heavy chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)687,74730
Polymers682,03016
Non-polymers5,71714
Water00
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Glutamate receptor ... , 2 types, 4 molecules ACBD

#1: Protein Glutamate receptor 3 / GluR-3 / AMPA-selective glutamate receptor 3 / GluR-C / GluR-K3 / Glutamate receptor ionotropic / ...GluR-3 / AMPA-selective glutamate receptor 3 / GluR-C / GluR-K3 / Glutamate receptor ionotropic / AMPA 3 / GluA3


Mass: 100556.680 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat) / References: UniProt: P19492
#2: Protein Glutamate receptor 2 / GluR-2 / AMPA-selective glutamate receptor 2 / GluR-B / GluR-K2 / Glutamate receptor ionotropic / ...GluR-2 / AMPA-selective glutamate receptor 2 / GluR-B / GluR-K2 / Glutamate receptor ionotropic / AMPA 2 / GluA2


Mass: 98783.805 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat) / References: UniProt: P19491

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Antibody , 5 types, 10 molecules EGIMJNKOLP

#3: Antibody A'-C' auxiliary proteins


Mass: 13039.064 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat)
#5: Antibody 5B2 Fab Light Chain


Mass: 18570.826 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat)
#6: Antibody 5B2 Fab Heavy Chain


Mass: 21038.842 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat)
#7: Antibody 15F1 Fab light chain


Mass: 25111.660 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Spodoptera frugiperda (fall armyworm)
#8: Antibody 15F1 Fab heavy chain


Mass: 27975.439 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Spodoptera frugiperda (fall armyworm)

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Protein / Non-polymers , 2 types, 6 molecules FH

#11: Chemical
ChemComp-ZK1 / {[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


Mass: 409.254 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C14H15F3N3O6P / Comment: antagonist, medication*YM
#4: Protein Voltage-dependent calcium channel gamma-2 subunit / Neuronal voltage-gated calcium channel gamma-2 subunit / Stargazin / Transmembrane AMPAR regulatory ...Neuronal voltage-gated calcium channel gamma-2 subunit / Stargazin / Transmembrane AMPAR regulatory protein gamma-2 / TARP gamma-2


Mass: 35938.746 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat) / References: UniProt: Q71RJ2

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Sugars , 3 types, 10 molecules

#9: Polysaccharide
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}}LINUCSPDB-CARE
#10: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#12: Sugar
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Details

Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1Native A3A2A3A2 complex bound with MPQXCOMPLEX#1-#80NATURAL
2LBD-TMD layers of native A3A2A3A2 nAMPAR complexCOMPLEX#1-#3, #6-#81NATURAL
3ATD-LBD layers of native A3A2A3A2 nAMPAR complexCOMPLEX#1-#2, #5-#81NATURAL
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
11Rattus norvegicus (Norway rat)10116
22Rattus norvegicus (Norway rat)10116
33Rattus norvegicus (Norway rat)10116
Buffer solutionpH: 8
Buffer component
IDConc.NameFormulaBuffer-ID
1150 mMsodium chlorideNaCl1
220 mMTrisC4H11NO31
30.1 % w/vdigitonindigitonin1
SpecimenConc.: 4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: unspecified
VitrificationCryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 295 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 54 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

EM software
IDNameCategory
2SerialEMimage acquisition
7Cootmodel fitting
8UCSF Chimeramodel fitting
11PHENIXmodel refinement
15RELION3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 6.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 99000 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL

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