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Yorodumi- PDB-7qhb: Active state of GluA1/2 in complex with TARP gamma 8, L-glutamate... -
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-Basic information
Entry | Database: PDB / ID: 7qhb | ||||||||||||
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Title | Active state of GluA1/2 in complex with TARP gamma 8, L-glutamate and CTZ | ||||||||||||
Components |
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Keywords | MEMBRANE PROTEIN / glutamate / AMPA receptor / TARPs | ||||||||||||
Function / homology | Function and homology information 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 / chemical synaptic transmission, postsynaptic / cellular response to ammonium ion / neurotransmitter receptor transport, postsynaptic endosome to lysosome ...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 / chemical synaptic transmission, postsynaptic / cellular response to ammonium ion / neurotransmitter receptor transport, postsynaptic endosome to lysosome / L-type voltage-gated calcium channel complex / neurotransmitter receptor activity involved in regulation of postsynaptic cytosolic calcium ion concentration / LGI-ADAM interactions / neuron spine / myosin V binding / Trafficking of AMPA receptors / regulation of AMPA receptor activity / neurotransmitter receptor internalization / channel regulator activity / protein phosphatase 2B binding / dendritic spine membrane / postsynaptic neurotransmitter receptor diffusion trapping / response to arsenic-containing substance / cellular response to dsRNA / Synaptic adhesion-like molecules / long-term synaptic depression / beta-2 adrenergic receptor binding / protein kinase A binding / cellular response to peptide hormone stimulus / neuronal cell body membrane / spine synapse / spinal cord development / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / response to lithium ion / perisynaptic space / cellular response to glycine / transmission of nerve impulse / AMPA glutamate receptor activity / regulation of postsynaptic membrane neurotransmitter receptor levels / Trafficking of GluR2-containing AMPA receptors / immunoglobulin binding / calcium channel regulator activity / AMPA glutamate receptor complex / neuronal action potential / kainate selective glutamate receptor activity / excitatory synapse / ionotropic glutamate receptor complex / extracellularly glutamate-gated ion channel activity / adenylate cyclase binding / cellular response to organic cyclic compound / asymmetric synapse / G-protein alpha-subunit binding / regulation of receptor recycling / Unblocking of NMDA receptors, glutamate binding and activation / long-term memory / voltage-gated calcium channel activity / glutamate receptor binding / regulation of postsynaptic membrane potential / positive regulation of synaptic transmission / response to electrical stimulus / glutamate-gated receptor activity / presynaptic active zone membrane / response to fungicide / regulation of synaptic transmission, glutamatergic / cellular response to brain-derived neurotrophic factor stimulus / somatodendritic compartment / synapse assembly / dendrite membrane / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / ionotropic glutamate receptor binding / ionotropic glutamate receptor signaling pathway / dendrite cytoplasm / cytoskeletal protein binding / monoatomic ion transmembrane transport / positive regulation of synaptic transmission, glutamatergic / SNARE binding / dendritic shaft / response to cocaine / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / synaptic membrane / synaptic transmission, glutamatergic / PDZ domain binding / cellular response to amino acid stimulus / postsynaptic density membrane / protein tetramerization / regulation of synaptic plasticity / modulation of chemical synaptic transmission / neuromuscular junction / Schaffer collateral - CA1 synapse / establishment of protein localization / terminal bouton / receptor internalization / synaptic vesicle membrane / response to organic cyclic compound / cerebral cortex development / response to peptide hormone / response to toxic substance / cellular response to growth factor stimulus Similarity search - Function | ||||||||||||
Biological species | Rattus norvegicus (Norway rat) | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å | ||||||||||||
Authors | Herguedas, B. / Kohegyi, B. / Zhang, D. / Greger, I.H. | ||||||||||||
Funding support | Spain, 3items
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Citation | Journal: Nat Commun / Year: 2022 Title: 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. | ||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 7qhb.cif.gz | 385.4 KB | Display | PDBx/mmCIF format |
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PDB format | pdb7qhb.ent.gz | 294.3 KB | Display | PDB format |
PDBx/mmJSON format | 7qhb.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/qh/7qhb ftp://data.pdbj.org/pub/pdb/validation_reports/qh/7qhb | HTTPS FTP |
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-Related structure data
Related structure data | 13969MC 7qhhC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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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.) Rattus norvegicus (Norway rat) / Gene: Gria1, Glur1 / Plasmid: PRK5 / Production host: 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.) Rattus norvegicus (Norway rat) / Gene: Gria2, Glur2 / Production host: Homo sapiens (human) / References: UniProt: P19491 |
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-Protein , 1 types, 2 molecules IJ
#3: Protein | 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 |
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-Non-polymers , 5 types, 28 molecules
#4: Chemical | ChemComp-PAM / #5: Chemical | ChemComp-GLU / #6: Chemical | ChemComp-CYZ / #7: Chemical | #8: Chemical | ChemComp-79N / ( |
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-Details
Has ligand of interest | Y |
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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 |
-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: Rattus norvegicus (Norway rat) |
Source (recombinant) | Organism: Homo sapiens (human) / 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 |
-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 FIELDBright-field microscopy / Nominal defocus max: 2200 nm / Nominal defocus min: 340 nm |
Specimen holder | Cryogen: NITROGEN |
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 |
-Processing
Software | Name: PHENIX / Version: 1.18.1_3865: / Classification: refinement | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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EM software |
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CTF correction | Details: CTF refinement was performed after 3D reconstruction Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C2 (2 fold cyclic) | ||||||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 83344 / Algorithm: FOURIER SPACE / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | Details: Initial fitting was performed in Chimera with the Rigid Body fit option. The crystal structure of the L-Glu+CTZ GluA2 LBD was used for the LBD layer. After rigid body fitting Refmac and ...Details: Initial fitting was performed in Chimera with the Rigid Body fit option. The crystal structure of the L-Glu+CTZ GluA2 LBD was used for the LBD layer. After rigid body fitting Refmac and Phenix were used in refinement. Manual model building was performed in Coot | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building |
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Refine LS restraints |
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