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- PDB-7ocf: Active state GluA1/A2 AMPA receptor in complex with TARP gamma 8 ... -
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Basic information
Entry | Database: PDB / ID: 7ocf | |||||||||
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Title | Active state GluA1/A2 AMPA receptor in complex with TARP gamma 8 and CNIH2 (LBD-TMD) | |||||||||
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![]() | MEMBRANE PROTEIN / AMPAR / ion channels / neurotransmission | |||||||||
Function / homology | ![]() negative regulation of receptor localization to synapse / negative regulation of anterograde synaptic vesicle transport / Phase 2 - plateau phase / Phase 0 - rapid depolarisation / Cargo concentration in the ER / cellular response to amine stimulus / axonal spine / COPII-mediated vesicle transport / positive regulation of membrane potential / localization within membrane ...negative regulation of receptor localization to synapse / negative regulation of anterograde synaptic vesicle transport / Phase 2 - plateau phase / Phase 0 - rapid depolarisation / Cargo concentration in the ER / cellular response to amine stimulus / axonal spine / COPII-mediated vesicle transport / positive regulation of membrane potential / localization within membrane / cellular response to ammonium ion / neurotransmitter receptor transport, postsynaptic endosome to lysosome / L-type voltage-gated calcium channel complex / LGI-ADAM interactions / myosin V binding / neurotransmitter receptor activity involved in regulation of postsynaptic cytosolic calcium ion concentration / Trafficking of AMPA receptors / neuron spine / regulation of AMPA receptor activity / protein phosphatase 2B binding / neurotransmitter receptor internalization / response to arsenic-containing substance / cellular response to dsRNA / postsynaptic neurotransmitter receptor diffusion trapping / dendritic spine membrane / regulation of NMDA receptor activity / Synaptic adhesion-like molecules / long-term synaptic depression / beta-2 adrenergic receptor binding / cellular response to peptide hormone stimulus / protein kinase A binding / spinal cord development / spine synapse / dendritic spine neck / neuronal cell body membrane / dendritic spine head / Activation of AMPA receptors / perisynaptic space / transmission of nerve impulse / AMPA glutamate receptor activity / channel regulator activity / ligand-gated monoatomic cation channel activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / regulation of postsynaptic membrane neurotransmitter receptor levels / immunoglobulin binding / AMPA glutamate receptor complex / adenylate cyclase binding / kainate selective glutamate receptor activity / cellular response to organic cyclic compound / ionotropic glutamate receptor complex / excitatory synapse / extracellularly glutamate-gated ion channel activity / neuronal action potential / cellular response to glycine / calcium channel regulator activity / asymmetric synapse / G-protein alpha-subunit binding / regulation of receptor recycling / voltage-gated calcium channel activity / regulation of postsynaptic membrane potential / Unblocking of NMDA receptors, glutamate binding and activation / postsynaptic density, intracellular component / positive regulation of synaptic transmission / glutamate receptor binding / long-term memory / extracellular ligand-gated monoatomic ion channel activity / positive regulation of synaptic transmission, glutamatergic / response to electrical stimulus / glutamate-gated receptor activity / glutamate-gated calcium ion channel activity / presynaptic active zone membrane / response to fungicide / vesicle-mediated transport / regulation of synaptic transmission, glutamatergic / somatodendritic compartment / synapse assembly / cellular response to brain-derived neurotrophic factor stimulus / dendrite membrane / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / cytoskeletal protein binding / ionotropic glutamate receptor binding / dendrite cytoplasm / ionotropic glutamate receptor signaling pathway / cellular response to amino acid stimulus / regulation of membrane potential / SNARE binding / response to cocaine / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / dendritic shaft / synaptic membrane / synaptic transmission, glutamatergic / PDZ domain binding / long-term synaptic potentiation / protein tetramerization / postsynaptic density membrane / modulation of chemical synaptic transmission / establishment of protein localization / neuromuscular junction / regulation of synaptic plasticity Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.6 Å | |||||||||
![]() | Zhang, D. / Watson, J.F. / Matthews, P.M. / Cais, O. / Greger, I.H. | |||||||||
Funding support | 2items
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![]() | ![]() Title: Gating and modulation of a hetero-octameric AMPA glutamate receptor. Authors: Danyang Zhang / Jake F Watson / Peter M Matthews / Ondrej Cais / Ingo H Greger / ![]() ![]() Abstract: AMPA receptors (AMPARs) mediate the majority of excitatory transmission in the brain and enable the synaptic plasticity that underlies learning. A diverse array of AMPAR signalling complexes are ...AMPA receptors (AMPARs) mediate the majority of excitatory transmission in the brain and enable the synaptic plasticity that underlies learning. A diverse array of AMPAR signalling complexes are established by receptor auxiliary subunits, which associate with the AMPAR in various combinations to modulate trafficking, gating and synaptic strength. However, their mechanisms of action are poorly understood. Here we determine cryo-electron microscopy structures of the heteromeric GluA1-GluA2 receptor assembled with both TARP-γ8 and CNIH2, the predominant AMPAR complex in the forebrain, in both resting and active states. Two TARP-γ8 and two CNIH2 subunits insert at distinct sites beneath the ligand-binding domains of the receptor, with site-specific lipids shaping each interaction and affecting the gating regulation of the AMPARs. Activation of the receptor leads to asymmetry between GluA1 and GluA2 along the ion conduction path and an outward expansion of the channel triggers counter-rotations of both auxiliary subunit pairs, promoting the active-state conformation. In addition, both TARP-γ8 and CNIH2 pivot towards the pore exit upon activation, extending their reach for cytoplasmic receptor elements. CNIH2 achieves this through its uniquely extended M2 helix, which has transformed this endoplasmic reticulum-export factor into a powerful AMPAR modulator that is capable of providing hippocampal pyramidal neurons with their integrative synaptic properties. | |||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 445.7 KB | Display | ![]() |
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PDB format | ![]() | 334.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 12806MC ![]() 7ocaC ![]() 7occC ![]() 7ocdC ![]() 7oceC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Isoform Flip of Glutamate receptor ... , 2 types, 4 molecules ACBD
#1: Protein | Mass: 102661.930 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #2: Protein | Mass: 96247.055 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-Protein , 2 types, 4 molecules GEIJ
#3: Protein | Mass: 22000.605 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #4: Protein | Mass: 43576.004 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-Non-polymers , 3 types, 34 molecules ![](data/chem/img/CYZ.gif)
![](data/chem/img/PC1.gif)
![](data/chem/img/GLU.gif)
![](data/chem/img/PC1.gif)
![](data/chem/img/GLU.gif)
#5: Chemical | ChemComp-CYZ / #6: Chemical | ChemComp-PC1 / #7: Chemical | ChemComp-GLU / |
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-Details
Has ligand of interest | N |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: GluA1/A2 heterotetramer in complex with auxiliary subunits TARP gamma 8 and CNIH2 Type: COMPLEX / Entity ID: #1-#4 / Source: RECOMBINANT |
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Molecular weight | Value: 0.527 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 8 |
Specimen | Conc.: 3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: Purified protein was first incubated with 300 uM cyclothiazide (CTZ) for at least 30 min on ice and then quickly mixed with 1 M L-glutamate stock solution to 100 mM final L-Glu concentration ...Details: Purified protein was first incubated with 300 uM cyclothiazide (CTZ) for at least 30 min on ice and then quickly mixed with 1 M L-glutamate stock solution to 100 mM final L-Glu concentration just before being loaded onto the grids. |
Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3 |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Symmetry | Point symmetry: C2 (2 fold cyclic) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 120052 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | Protocol: RIGID BODY FIT / Space: REAL | ||||||||||||||||||||||||
Atomic model building |
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