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Yorodumi- PDB-7qhh: Desensitized state of GluA1/2 AMPA receptor in complex with TARP-... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 7qhh | ||||||||||||
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| Title | Desensitized state of GluA1/2 AMPA receptor in complex with TARP-gamma 8 (TMD-LBD) | ||||||||||||
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Keywords | MEMBRANE PROTEIN / glutamate / AMPA receptor / TARPs | ||||||||||||
| Function / homology | Function and homology informationPhase 0 - rapid depolarisation / Phase 2 - plateau phase / Cargo concentration in the ER / cellular response to ammonium ion / axonal spine / positive regulation of locomotion involved in locomotory behavior / COPII-mediated vesicle transport / positive regulation of membrane potential / response to sucrose / L-type voltage-gated calcium channel complex ...Phase 0 - rapid depolarisation / Phase 2 - plateau phase / Cargo concentration in the ER / cellular response to ammonium ion / axonal spine / positive regulation of locomotion involved in locomotory behavior / COPII-mediated vesicle transport / positive regulation of membrane potential / response to sucrose / L-type voltage-gated calcium channel complex / positive regulation of AMPA receptor activity / regulation of monoatomic ion transmembrane transport / myosin V binding / LGI-ADAM interactions / neuron spine / Trafficking of AMPA receptors / postsynaptic neurotransmitter receptor diffusion trapping / proximal dendrite / regulation of AMPA receptor activity / protein phosphatase 2B binding / response to arsenic-containing substance / cellular response to L-glutamate / channel regulator activity / cellular response to dsRNA / long-term synaptic depression / ligand-gated calcium channel activity / dendritic spine membrane / beta-2 adrenergic receptor binding / Synaptic adhesion-like molecules / cellular response to peptide hormone stimulus / spine synapse / dendritic spine neck / dendritic spine cytoplasm / dendritic spine head / cellular response to amine stimulus / response to morphine / peptide hormone receptor binding / response to psychosocial stress / Activation of AMPA receptors / ligand-gated monoatomic cation channel activity / perisynaptic space / spinal cord development / neuronal cell body membrane / Trafficking of GluR2-containing AMPA receptors / protein kinase A binding / response to lithium ion / AMPA glutamate receptor activity / AMPA glutamate receptor clustering / transmission of nerve impulse / regulation of receptor recycling / kainate selective glutamate receptor activity / behavioral response to pain / immunoglobulin binding / adenylate cyclase binding / AMPA glutamate receptor complex / extracellularly glutamate-gated ion channel activity / cellular response to glycine / response to electrical stimulus / ionotropic glutamate receptor complex / asymmetric synapse / Unblocking of NMDA receptors, glutamate binding and activation / G-protein alpha-subunit binding / glutamate receptor binding / positive regulation of synaptic transmission / conditioned place preference / regulation of postsynaptic membrane neurotransmitter receptor levels / long-term memory / voltage-gated calcium channel activity / postsynaptic density, intracellular component / regulation of synaptic transmission, glutamatergic / response to fungicide / neuronal action potential / cytoskeletal protein binding / extracellular ligand-gated monoatomic ion channel activity / glutamate-gated receptor activity / cellular response to brain-derived neurotrophic factor stimulus / regulation of long-term synaptic depression / positive regulation of synaptic transmission, glutamatergic / somatodendritic compartment / glutamate-gated calcium ion channel activity / synapse assembly / presynaptic active zone membrane / ionotropic glutamate receptor signaling pathway / ionotropic glutamate receptor binding / dendrite cytoplasm / excitatory synapse / dendrite membrane / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / positive regulation of excitatory postsynaptic potential / cellular response to amino acid stimulus / dendritic shaft / SNARE binding / synaptic membrane / response to cocaine / PDZ domain binding / calcium channel regulator activity / neuromuscular junction / protein tetramerization / establishment of protein localization / synaptic transmission, glutamatergic Similarity search - Function | ||||||||||||
| Biological species | ![]() | ||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.6 Å | ||||||||||||
Authors | Herguedas, B. / Kohegyi, B. / Dohrke, J.N. / Watson, J.F. / Zhang, D. / Ho, H. / Shaikh, S. / Lape, R. / Krieger, J.M. / Greger, I.H. | ||||||||||||
| Funding support | United Kingdom, 3items
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Citation | Journal: Nat Commun / Year: 2022Title: Mechanisms underlying TARP modulation of the GluA1/2-γ8 AMPA receptor. Authors: Beatriz Herguedas / Bianka K Kohegyi / Jan-Niklas Dohrke / Jake F Watson / Danyang Zhang / Hinze Ho / Saher A Shaikh / Remigijus Lape / James M Krieger / Ingo H Greger / ![]() Abstract: AMPA-type glutamate receptors (AMPARs) mediate rapid signal transmission at excitatory synapses in the brain. Glutamate binding to the receptor's ligand-binding domains (LBDs) leads to ion channel ...AMPA-type glutamate receptors (AMPARs) mediate rapid signal transmission at excitatory synapses in the brain. Glutamate binding to the receptor's ligand-binding domains (LBDs) leads to ion channel activation and desensitization. Gating kinetics shape synaptic transmission and are strongly modulated by transmembrane AMPAR regulatory proteins (TARPs) through currently incompletely resolved mechanisms. Here, electron cryo-microscopy structures of the GluA1/2 TARP-γ8 complex, in both open and desensitized states (at 3.5 Å), reveal state-selective engagement of the LBDs by the large TARP-γ8 loop ('β1'), elucidating how this TARP stabilizes specific gating states. We further show how TARPs alter channel rectification, by interacting with the pore helix of the selectivity filter. Lastly, we reveal that the Q/R-editing site couples the channel constriction at the filter entrance to the gate, and forms the major cation binding site in the conduction path. Our results provide a mechanistic framework of how TARPs modulate AMPAR gating and conductance. | ||||||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7qhh.cif.gz | 401.1 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb7qhh.ent.gz | 280.3 KB | Display | PDB format |
| PDBx/mmJSON format | 7qhh.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/qh/7qhh ftp://data.pdbj.org/pub/pdb/validation_reports/qh/7qhh | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 13972MC ![]() 7qhbC C: citing same article ( M: map data used to model this data |
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| Similar structure data |
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Links
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Assembly
| Deposited unit | ![]()
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| Noncrystallographic symmetry (NCS) | NCS domain:
NCS domain segments: Component-ID: _ / Refine code: _
NCS ensembles :
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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.) ![]() Homo sapiens (human) / References: UniProt: P19490#2: Protein | Mass: 96247.055 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Homo sapiens (human) / References: UniProt: P19491 |
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-Protein , 1 types, 2 molecules JI
| #3: Protein | Mass: 43576.004 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Homo sapiens (human) / References: UniProt: Q8VHW5 |
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-Non-polymers , 4 types, 18 molecules 






| #4: Chemical | ChemComp-GLU / #5: Chemical | ChemComp-PAM / #6: Chemical | #7: Chemical | |
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-Details
| Has ligand of interest | Y |
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| Has protein modification | Y |
-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: Complex between GluA1/2 AMPA receptor and auxiliary subunit TARP gamma8 Type: COMPLEX Details: GluA2 and TARP8 are expressed as a tandem construct Entity ID: #1-#3 / Source: RECOMBINANT |
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| Molecular weight | Value: 0.490 MDa / Experimental value: NO |
| Source (natural) | Organism: ![]() |
| Source (recombinant) | Organism: Homo sapiens (human) / Cell: HEK293 EXPI / Plasmid: PRK5 |
| Buffer solution | pH: 8 Details: 25 mM TRIS 150 mM NaCl 0.02 % GDN 87 uM CTZ 100 mM L-Glu |
| Specimen | Conc.: 2.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: Sample was incubated with 87 uM CTZ for 30 minutes and 100 mM L-Glutamate was added before grid preparation |
| Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3 |
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K / Details: 3-4 second blots |
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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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER |
| Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 81000 X / Nominal defocus max: 2200 nm / Nominal defocus min: 340 nm |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Average exposure time: 4 sec. / Electron dose: 51 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 9664 |
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Processing
| Software | Name: REFMAC / Version: 5.8.0267 / Classification: refinement | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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: 105918 / Algorithm: FOURIER SPACE / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | Protocol: RIGID BODY FIT / Space: REAL Details: First, rigid body fit was performed in Chimera using the coordinates of the TMD of 6QKC and the coordinates of the LBD in PDB code 3TKD. Manual model building was performed with Coot and ...Details: First, rigid body fit was performed in Chimera using the coordinates of the TMD of 6QKC and the coordinates of the LBD in PDB code 3TKD. Manual model building was performed with Coot and Refinement was performed with Refmac. The TMD and LBD maps obtained independently aided model building but were not used for refinement. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building |
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| Refinement | Resolution: 3.6→339.2 Å / Cor.coef. Fo:Fc: 0.664 / SU B: 23.138 / SU ML: 0.306 / ESU R: 0.153 Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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| Solvent computation | Solvent model: PARAMETERS FOR MASK CACLULATION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Displacement parameters | Biso mean: 81.995 Å2
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| Refinement step | Cycle: 1 / Total: 13622 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refine LS restraints |
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About Yorodumi





United Kingdom, 3items
Citation

UCSF Chimera














PDBj











Homo sapiens (human)

