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- PDB-6ucb: GluA2 in complex with its auxiliary subunit CNIH3 - with antagoni... -

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Basic information

Entry
Database: PDB / ID: 6ucb
TitleGluA2 in complex with its auxiliary subunit CNIH3 - with antagonist ZK200775, LBD, TMD, CNIH3, and lipids
Components
  • Glutamate receptor 2
  • Protein cornichon homolog 3
KeywordsTRANSPORT PROTEIN / ionotropic glutamate receptor / AMPA receptor / cornichon / auxiliary subunit / ion channel / ligand gated ion channel / synaptic transmission / excitatory synaptic transmission / neurotransmitter receptor / stargazin / TARP / ZK200775 / lipid / MPQX
Function / homology
Function and homology information


Cargo concentration in the ER / COPII-mediated vesicle transport / regulation of AMPA receptor activity / channel regulator activity / spine synapse / dendritic spine cytoplasm / dendritic spine neck / cellular response to amine stimulus / dendritic spine head / neurotransmitter receptor localization to postsynaptic specialization membrane ...Cargo concentration in the ER / COPII-mediated vesicle transport / regulation of AMPA receptor activity / channel regulator activity / spine synapse / dendritic spine cytoplasm / dendritic spine neck / cellular response to amine stimulus / dendritic spine head / neurotransmitter receptor localization to postsynaptic specialization membrane / Activation of AMPA receptors / ligand-gated monoatomic cation channel activity / perisynaptic space / Trafficking of GluR2-containing AMPA receptors / AMPA glutamate receptor activity / response to lithium ion / AMPA glutamate receptor clustering / kainate selective glutamate receptor activity / immunoglobulin binding / asymmetric synapse / AMPA glutamate receptor complex / 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 / glutamate receptor binding / conditioned place preference / positive regulation of synaptic transmission / response to fungicide / regulation of synaptic transmission, glutamatergic / vesicle-mediated transport / 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 / 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 / SNARE binding / synaptic membrane / PDZ domain binding / synaptic transmission, glutamatergic / establishment of protein localization / protein tetramerization / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / regulation of membrane potential / cerebral cortex development / receptor internalization / postsynaptic density membrane / modulation of chemical synaptic transmission / Schaffer collateral - CA1 synapse / terminal bouton / synaptic vesicle / long-term synaptic potentiation / synaptic vesicle membrane / amyloid-beta binding / growth cone / presynapse / signaling receptor activity / presynaptic membrane / scaffold protein binding / dendritic spine / chemical synaptic transmission / perikaryon / postsynaptic membrane / neuron projection / postsynaptic density / signaling receptor binding / external side of plasma membrane / axon / neuronal cell body / synapse / dendrite / protein kinase binding / protein-containing complex binding / glutamatergic synapse / cell surface / endoplasmic reticulum / protein-containing complex / membrane / identical protein binding / plasma membrane
Similarity search - Function
Cornichon / Cornichon, conserved site / Cornichon protein / Cornichon family signature. / Cornichon / Ionotropic glutamate receptor, metazoa / Ligated ion channel L-glutamate- and glycine-binding site / Ligand-gated ion channel / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site ...Cornichon / Cornichon, conserved site / Cornichon protein / Cornichon family signature. / Cornichon / Ionotropic glutamate receptor, metazoa / Ligated ion channel L-glutamate- and glycine-binding site / Ligand-gated ion channel / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site / : / 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
CHOLESTEROL / (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate / PALMITOLEIC ACID / Chem-ZK1 / Glutamate receptor 2 / Protein cornichon homolog 3
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.28 Å
AuthorsNakagawa, T.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)R01HD061543 United States
CitationJournal: Science / Year: 2019
Title: Structures of the AMPA receptor in complex with its auxiliary subunit cornichon.
Authors: Terunaga Nakagawa /
Abstract: In the brain, AMPA-type glutamate receptors (AMPARs) form complexes with their auxiliary subunits and mediate the majority of fast excitatory neurotransmission. Signals transduced by these complexes ...In the brain, AMPA-type glutamate receptors (AMPARs) form complexes with their auxiliary subunits and mediate the majority of fast excitatory neurotransmission. Signals transduced by these complexes are critical for synaptic plasticity, learning, and memory. The two major categories of AMPAR auxiliary subunits are transmembrane AMPAR regulatory proteins (TARPs) and cornichon homologs (CNIHs); these subunits share little homology and play distinct roles in controlling ion channel gating and trafficking of AMPAR. Here, I report high-resolution cryo-electron microscopy structures of AMPAR in complex with CNIH3. Contrary to its predicted membrane topology, CNIH3 lacks an extracellular domain and instead contains four membrane-spanning helices. The protein-protein interaction interface that dictates channel modulation and the lipids surrounding the complex are revealed. These structures provide insights into the molecular mechanism for ion channel modulation and assembly of AMPAR/CNIH3 complexes.
History
DepositionSep 15, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 4, 2019Provider: repository / Type: Initial release
Revision 1.1Dec 11, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.2Dec 18, 2019Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID
Revision 1.3Nov 13, 2024Group: Data collection / Database references / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

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Assembly

Deposited unit
A: Glutamate receptor 2
B: Glutamate receptor 2
C: Glutamate receptor 2
E: Protein cornichon homolog 3
F: Protein cornichon homolog 3
G: Protein cornichon homolog 3
H: Protein cornichon homolog 3
D: Glutamate receptor 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)488,77038
Polymers479,1738
Non-polymers9,59830
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration, cross-linking, immunoprecipitation
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area43290 Å2
ΔGint-307 kcal/mol
Surface area94910 Å2

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Components

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Protein , 2 types, 8 molecules ABCDEFGH

#1: 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: 99530.391 Da / Num. of mol.: 4
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
#2: Protein
Protein cornichon homolog 3 / CNIH-3 / Cornichon family AMPA receptor auxiliary protein 3


Mass: 20262.758 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Cnih3 / Production host: Homo sapiens (human) / References: UniProt: Q6ZWS4

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Non-polymers , 4 types, 30 molecules

#3: 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 / Feature type: SUBJECT OF INVESTIGATION / Comment: antagonist, medication*YM
#4: Chemical
ChemComp-OLC / (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate / 1-Oleoyl-R-glycerol


Mass: 356.540 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C21H40O4 / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical
ChemComp-PAM / PALMITOLEIC ACID


Mass: 254.408 Da / Num. of mol.: 14 / Source method: obtained synthetically / Formula: C16H30O2 / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical
ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C27H46O / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY
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
IDNameTypeDetailsEntity IDParent-IDSource
1GluA2 in complex with CNIH3 at 4:4 stoichiometryCOMPLEXBound to antagonist ZK200775 (MPQX). Lipid densities are observed.#1-#20RECOMBINANT
2Glutamate receptor 2COMPLEX#11RECOMBINANT
3Protein cornichon homolog 3COMPLEX#21RECOMBINANT
Molecular weightValue: 0.47 MDa / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Rattus norvegicus (Norway rat)10116
23Mus musculus (house mouse)10090
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-IDStrain
12Homo sapiens (human)9606HEK
23Homo sapiens (human)9606HEK
Buffer solutionpH: 8
Buffer component
IDConc.NameFormulaBuffer-ID
120 mMTrisTrisHCl1
2150 mMsodium chlorideNaCl1
30.05 %GDNGDN1
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 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 / Nominal magnification: 81000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 6 sec. / Electron dose: 58.5 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 11340
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV

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Processing

EM software
IDNameVersionCategory
1RELION3particle selection
2SerialEMimage acquisition
4CTFFIND4CTF correction
7Cootmodel fitting
9PHENIXmodel refinement
10RELION3.06initial Euler assignment
11RELION3.06final Euler assignment
12RELION3.06classification
13RELION3.063D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 6780000
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 3.28 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 111016 / Symmetry type: POINT
Atomic model buildingSpace: REAL

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