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- PDB-6qkc: GluA1/2 In complex with auxiliary subunit gamma-8 -

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Basic information

Entry
Database: PDB / ID: 6qkc
TitleGluA1/2 In complex with auxiliary subunit gamma-8
Components
  • Glutamate receptor 1
  • Glutamate receptor 2
  • Voltage-dependent calcium channel gamma-8 subunit
KeywordsMEMBRANE PROTEIN / AMPAR / ion channel / GluA1 / GluA2 / tarp
Function / homology
Function and homology information


Phase 0 - rapid depolarisation / Phase 2 - plateau phase / Cargo concentration in the ER / axonal spine / positive regulation of locomotion involved in locomotory behavior / positive regulation of membrane potential / COPII-mediated vesicle transport / cellular response to ammonium ion / response to sucrose / L-type voltage-gated calcium channel complex ...Phase 0 - rapid depolarisation / Phase 2 - plateau phase / Cargo concentration in the ER / axonal spine / positive regulation of locomotion involved in locomotory behavior / positive regulation of membrane potential / COPII-mediated vesicle transport / cellular response to ammonium ion / response to sucrose / L-type voltage-gated calcium channel complex / myosin V binding / neuron spine / postsynaptic neurotransmitter receptor diffusion trapping / proximal dendrite / LGI-ADAM interactions / protein phosphatase 2B binding / Trafficking of AMPA receptors / regulation of AMPA receptor activity / response to arsenic-containing substance / regulation of monoatomic ion transmembrane transport / channel regulator activity / ligand-gated calcium channel activity / cellular response to L-glutamate / cellular response to dsRNA / dendritic spine membrane / beta-2 adrenergic receptor binding / long-term synaptic depression / Synaptic adhesion-like molecules / cellular response to peptide hormone stimulus / spine synapse / dendritic spine cytoplasm / dendritic spine neck / cellular response to amine stimulus / dendritic spine head / response to psychosocial stress / peptide hormone receptor binding / response to morphine / neuronal cell body membrane / spinal cord development / Activation of AMPA receptors / ligand-gated monoatomic cation channel activity / perisynaptic space / protein kinase A binding / Trafficking of GluR2-containing AMPA receptors / AMPA glutamate receptor activity / response to lithium ion / transmission of nerve impulse / AMPA glutamate receptor clustering / behavioral response to pain / kainate selective glutamate receptor activity / immunoglobulin binding / adenylate cyclase binding / asymmetric synapse / AMPA glutamate receptor complex / response to electrical stimulus / regulation of receptor recycling / extracellularly glutamate-gated ion channel activity / cellular response to glycine / ionotropic glutamate receptor complex / Unblocking of NMDA receptors, glutamate binding and activation / G-protein alpha-subunit binding / conditioned place preference / glutamate receptor binding / positive regulation of synaptic transmission / regulation of postsynaptic membrane neurotransmitter receptor levels / long-term memory / voltage-gated calcium channel activity / postsynaptic density, intracellular component / response to fungicide / neuronal action potential / regulation of synaptic transmission, glutamatergic / positive regulation of synaptic transmission, glutamatergic / extracellular ligand-gated monoatomic ion channel activity / glutamate-gated receptor activity / cytoskeletal protein binding / cellular response to brain-derived neurotrophic factor stimulus / regulation of long-term synaptic depression / somatodendritic compartment / glutamate-gated calcium ion channel activity / synapse assembly / presynaptic active zone membrane / excitatory synapse / ionotropic glutamate receptor signaling pathway / ionotropic glutamate receptor binding / dendrite membrane / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / dendrite cytoplasm / positive regulation of excitatory postsynaptic potential / dendritic shaft / synaptic membrane / SNARE binding / PDZ domain binding / response to cocaine / neuromuscular junction / calcium channel regulator activity / synaptic transmission, glutamatergic / cellular response to amino acid stimulus / establishment of protein localization / protein tetramerization / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential
Similarity search - Function
Voltage-dependent calcium channel, gamma-8 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-8 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-E2Q / (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate / Glutamate receptor 1 / Glutamate receptor 2 / Voltage-dependent calcium channel gamma-8 subunit
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.4 Å
AuthorsHerguedas, B. / Garcia-Nafria, J. / Greger, I.G.
CitationJournal: Science / Year: 2019
Title: Architecture of the heteromeric GluA1/2 AMPA receptor in complex with the auxiliary subunit TARP γ8.
Authors: Beatriz Herguedas / Jake F Watson / Hinze Ho / Ondrej Cais / Javier García-Nafría / Ingo H Greger /
Abstract: AMPA-type glutamate receptors (AMPARs) mediate excitatory neurotransmission and are central regulators of synaptic plasticity, a molecular mechanism underlying learning and memory. Although AMPARs ...AMPA-type glutamate receptors (AMPARs) mediate excitatory neurotransmission and are central regulators of synaptic plasticity, a molecular mechanism underlying learning and memory. Although AMPARs act predominantly as heteromers, structural studies have focused on homomeric assemblies. Here, we present a cryo-electron microscopy structure of the heteromeric GluA1/2 receptor associated with two transmembrane AMPAR regulatory protein (TARP) γ8 auxiliary subunits, the principal AMPAR complex at hippocampal synapses. Within the receptor, the core subunits arrange to give the GluA2 subunit dominant control of gating. This structure reveals the geometry of the Q/R site that controls calcium flux, suggests association of TARP-stabilized lipids, and demonstrates that the extracellular loop of γ8 modulates gating by selectively interacting with the GluA2 ligand-binding domain. Collectively, this structure provides a blueprint for deciphering the signal transduction mechanisms of synaptic AMPARs.
History
DepositionJan 28, 2019Deposition site: PDBE / Processing site: PDBE
Revision 1.0Mar 27, 2019Provider: repository / Type: Initial release
Revision 1.1May 8, 2019Group: Data collection / Database references
Category: citation / database_PDB_rev ...citation / database_PDB_rev / database_PDB_rev_record / em_admin / pdbx_database_proc
Item: _citation.journal_volume / _em_admin.last_update
Revision 1.2Dec 18, 2019Group: Other / Category: atom_sites / cell
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][1] ..._atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][2] / _atom_sites.fract_transf_matrix[3][3] / _cell.Z_PDB
Revision 1.3Jul 29, 2020Group: Data collection / Category: em_imaging_optics / Item: _em_imaging_optics.phase_plate
Revision 1.4Oct 23, 2024Group: Data collection / Database references ...Data collection / Database references / Refinement description / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / em_admin / pdbx_entry_details / pdbx_initial_refinement_model / pdbx_modification_feature / refine
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type / _em_admin.last_update / _refine.ls_d_res_high / _refine.ls_d_res_low

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Structure visualization

Movie
  • Deposited structure unit
  • Imaged by Jmol
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  • Superimposition on EM map
  • EMDB-4572
  • Imaged by UCSF Chimera
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Structure viewerMolecule:
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Assembly

Deposited unit
A: Glutamate receptor 1
B: Glutamate receptor 2
C: Glutamate receptor 1
D: Glutamate receptor 2
I: Voltage-dependent calcium channel gamma-8 subunit
J: Voltage-dependent calcium channel gamma-8 subunit
hetero molecules


Theoretical massNumber of molelcules
Total (without water)490,59422
Polymers484,9706
Non-polymers5,62416
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area25710 Å2
ΔGint-251 kcal/mol
Surface area95020 Å2
MethodPISA

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Components

#1: Protein Glutamate receptor 1 / GluR-1 / AMPA-selective glutamate receptor 1 / GluR-A / GluR-K1 / Glutamate receptor ionotropic / ...GluR-1 / AMPA-selective glutamate receptor 1 / GluR-A / GluR-K1 / Glutamate receptor ionotropic / AMPA 1 / GluA1


Mass: 102661.930 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Gria1, Glur1 / Production host: Homo sapiens (human) / References: UniProt: P19490
#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: 96247.055 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Gria2, Glur2 / Production host: Homo sapiens (human) / References: UniProt: P19491
#3: Protein Voltage-dependent calcium channel gamma-8 subunit / Neuronal voltage-gated calcium channel gamma-8 subunit / Transmembrane AMPAR regulatory protein ...Neuronal voltage-gated calcium channel gamma-8 subunit / Transmembrane AMPAR regulatory protein gamma-8 / TARP gamma-8


Mass: 43576.004 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Cacng8 / Production host: Homo sapiens (human) / References: UniProt: Q8VHW5
#4: Chemical
ChemComp-E2Q / 6-nitro-2,3-bis(oxidanylidene)-1,4-dihydrobenzo[f]quinoxaline-7-sulfonamide


Mass: 336.280 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C12H8N4O6S / Comment: antagonist*YM
#5: Chemical
ChemComp-OLC / (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate / 1-Oleoyl-R-glycerol


Mass: 356.540 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: C21H40O4
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

ComponentName: GluA1/A2 bound to gamma-8 / Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT
Molecular weightValue: 447 kDa/nm / Experimental value: NO
Source (natural)Organism: Rattus norvegicus (Norway rat)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
Details: 25 mM TRIS, pH 8, 150 mM NaCl and 0.1 % digitonin (w/v)
SpecimenConc.: 0.4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K
Details: 3uL on grid, 60 sec incubation and 4sec blotting time

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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 / Nominal magnification: 105000 X / Nominal defocus max: -900 nm / Nominal defocus min: -200 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature (max): 100 K / Temperature (min): 100 K
Image recordingAverage exposure time: 14 sec. / Electron dose: 32 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 3 / Num. of real images: 5005
EM imaging opticsEnergyfilter slit width: 20 eV / Phase plate: VOLTA PHASE PLATE
Image scansWidth: 3838 / Height: 3710 / Movie frames/image: 35

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Processing

SoftwareName: REFMAC / Version: 5.8.0236 / Classification: refinement
EM software
IDNameVersionCategory
2EPUimage acquisition
4Gctf1.06CTF correction
7UCSF Chimera1.11.2model fitting
8Cootmodel fitting
10RELION3initial Euler assignment
11RELION3final Euler assignment
12RELION3classification
13RELION33D reconstruction
14REFMAC5model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 4.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 114730 / Algorithm: FOURIER SPACE / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: RECIPROCAL
Atomic model building
IDPDB-ID 3D fitting-IDAccession codeInitial refinement model-IDSource nameType
15WEO

5weo

15WEO1PDBexperimental model
23UA8

3ua8

13UA82PDBexperimental model
35KK2

5kk2

15KK23PDBexperimental model
RefinementResolution: 4.4→4.4 Å / Cor.coef. Fo:Fc: 0.636 / ESU R: 3.041
Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES
Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflection
Rwork0.36461 --
obs0.36461 58500 100 %
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 100.508 Å2
Baniso -1Baniso -2Baniso -3
1-0.88 Å2-1.24 Å2-0.05 Å2
2---3.18 Å20.02 Å2
3---2.31 Å2
Refinement stepCycle: 1 / Total: 13792
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
ELECTRON MICROSCOPYr_bond_refined_d0.0130.01314092
ELECTRON MICROSCOPYr_bond_other_d0.0370.01712856
ELECTRON MICROSCOPYr_angle_refined_deg1.3451.6519190
ELECTRON MICROSCOPYr_angle_other_deg2.4541.629272
ELECTRON MICROSCOPYr_dihedral_angle_1_deg4.70851882
ELECTRON MICROSCOPYr_dihedral_angle_2_deg31.22520.467428
ELECTRON MICROSCOPYr_dihedral_angle_3_deg17.994151776
ELECTRON MICROSCOPYr_dihedral_angle_4_deg10.6581546
ELECTRON MICROSCOPYr_chiral_restr0.1270.21950
ELECTRON MICROSCOPYr_gen_planes_refined0.0020.0215896
ELECTRON MICROSCOPYr_gen_planes_other0.0030.023140
ELECTRON MICROSCOPYr_nbd_refined
ELECTRON MICROSCOPYr_nbd_other
ELECTRON MICROSCOPYr_nbtor_refined
ELECTRON MICROSCOPYr_nbtor_other
ELECTRON MICROSCOPYr_xyhbond_nbd_refined
ELECTRON MICROSCOPYr_xyhbond_nbd_other
ELECTRON MICROSCOPYr_metal_ion_refined
ELECTRON MICROSCOPYr_metal_ion_other
ELECTRON MICROSCOPYr_symmetry_vdw_refined
ELECTRON MICROSCOPYr_symmetry_vdw_other
ELECTRON MICROSCOPYr_symmetry_hbond_refined
ELECTRON MICROSCOPYr_symmetry_hbond_other
ELECTRON MICROSCOPYr_symmetry_metal_ion_refined
ELECTRON MICROSCOPYr_symmetry_metal_ion_other
ELECTRON MICROSCOPYr_mcbond_it4.29412.1277596
ELECTRON MICROSCOPYr_mcbond_other4.29612.1257587
ELECTRON MICROSCOPYr_mcangle_it7.87518.1679454
ELECTRON MICROSCOPYr_mcangle_other7.87618.1679451
ELECTRON MICROSCOPYr_scbond_it3.5911.4056496
ELECTRON MICROSCOPYr_scbond_other3.58911.4036497
ELECTRON MICROSCOPYr_scangle_it
ELECTRON MICROSCOPYr_scangle_other6.66517.2599737
ELECTRON MICROSCOPYr_long_range_B_refined11.51314660
ELECTRON MICROSCOPYr_long_range_B_other11.51314661
ELECTRON MICROSCOPYr_rigid_bond_restr
ELECTRON MICROSCOPYr_sphericity_free
ELECTRON MICROSCOPYr_sphericity_bonded
LS refinement shellResolution: 4.1→4.206 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0 0 -
Rwork0.521 4260 -
obs--100 %

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