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- PDB-5kbu: Cryo-EM structure of GluA2-2xSTZ complex at 7.8 Angstrom resolution -
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Open data
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Basic information
Entry | Database: PDB / ID: 5kbu | ||||||
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Title | Cryo-EM structure of GluA2-2xSTZ complex at 7.8 Angstrom resolution | ||||||
![]() | Glutamate receptor 2,Voltage-dependent calcium channel gamma-2 subunit | ||||||
![]() | TRANSPORT PROTEIN / Cryo-EM | ||||||
Function / homology | ![]() Presynaptic depolarization and calcium channel opening / LGI-ADAM interactions / regulation of postsynaptic neurotransmitter receptor activity / Trafficking of AMPA receptors / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / neurotransmitter receptor transport, postsynaptic endosome to lysosome / regulation of AMPA receptor activity / neurotransmitter receptor internalization ...Presynaptic depolarization and calcium channel opening / LGI-ADAM interactions / regulation of postsynaptic neurotransmitter receptor activity / Trafficking of AMPA receptors / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / neurotransmitter receptor transport, postsynaptic endosome to lysosome / regulation of AMPA receptor activity / neurotransmitter receptor internalization / membrane hyperpolarization / postsynaptic neurotransmitter receptor diffusion trapping / protein targeting to membrane / nervous system process / voltage-gated calcium channel complex / neurotransmitter receptor localization to postsynaptic specialization membrane / neuromuscular junction development / spine synapse / dendritic spine neck / 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 / regulation of postsynaptic membrane neurotransmitter receptor levels / response to lithium ion / immunoglobulin binding / membrane depolarization / AMPA glutamate receptor complex / kainate selective glutamate receptor activity / ionotropic glutamate receptor complex / extracellularly glutamate-gated ion channel activity / cellular response to glycine / asymmetric synapse / regulation of receptor recycling / voltage-gated calcium channel activity / Unblocking of NMDA receptors, glutamate binding and activation / positive regulation of synaptic transmission / glutamate receptor binding / extracellular ligand-gated monoatomic ion channel activity / glutamate-gated calcium ion channel activity / glutamate-gated receptor activity / presynaptic active zone membrane / response to fungicide / regulation of synaptic transmission, glutamatergic / somatodendritic compartment / 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 / dendrite cytoplasm / ionotropic glutamate receptor signaling pathway / hippocampal mossy fiber to CA3 synapse / positive regulation of synaptic transmission, glutamatergic / SNARE binding / regulation of membrane potential / dendritic shaft / synaptic membrane / synaptic transmission, glutamatergic / PDZ domain binding / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / protein tetramerization / postsynaptic density membrane / ionotropic glutamate receptor binding / modulation of chemical synaptic transmission / establishment of protein localization / Schaffer collateral - CA1 synapse / terminal bouton / receptor internalization / cerebral cortex development / synaptic vesicle membrane / response to calcium ion / synaptic vesicle / presynapse / signaling receptor activity / presynaptic membrane / amyloid-beta binding / growth cone / scaffold protein binding / chemical synaptic transmission / postsynaptic membrane / perikaryon / dendritic spine / postsynaptic density / neuron projection / axon / neuronal cell body / glutamatergic synapse / synapse / dendrite / protein-containing complex binding / protein kinase binding / cell surface / endoplasmic reticulum / protein-containing complex / identical protein binding / membrane Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 7.8 Å | ||||||
![]() | Twomey, E.C. / Yelshanskaya, M.V. / Grassucci, R.A. / Frank, J. / Sobolevsky, A.I. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Elucidation of AMPA receptor-stargazin complexes by cryo-electron microscopy. Authors: Edward C Twomey / Maria V Yelshanskaya / Robert A Grassucci / Joachim Frank / Alexander I Sobolevsky / ![]() Abstract: AMPA-subtype ionotropic glutamate receptors (AMPARs) mediate fast excitatory neurotransmission and contribute to high cognitive processes such as learning and memory. In the brain, AMPAR trafficking, ...AMPA-subtype ionotropic glutamate receptors (AMPARs) mediate fast excitatory neurotransmission and contribute to high cognitive processes such as learning and memory. In the brain, AMPAR trafficking, gating, and pharmacology is tightly controlled by transmembrane AMPAR regulatory proteins (TARPs). Here, we used cryo-electron microscopy to elucidate the structural basis of AMPAR regulation by one of these auxiliary proteins, TARP γ2, or stargazin (STZ). Our structures illuminate the variable interaction stoichiometry of the AMPAR-TARP complex, with one or two TARP molecules binding one tetrameric AMPAR. Analysis of the AMPAR-STZ binding interfaces suggests that electrostatic interactions between the extracellular domains of AMPAR and STZ play an important role in modulating AMPAR function through contact surfaces that are conserved across AMPARs and TARPs. We propose a model explaining how TARPs stabilize the activated state of AMPARs and how the interactions between AMPARs and their auxiliary proteins control fast excitatory synaptic transmission. | ||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 659 KB | Display | ![]() |
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PDB format | ![]() | 519 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 | ![]() 8231MC ![]() 8229C ![]() 8230C ![]() 8232C ![]() 5kbsC ![]() 5kbtC ![]() 5kbvC 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
#1: Protein | Mass: 115515.984 Da / Num. of mol.: 4 / Mutation: N241E, V382L, G384E, N385D, V758L Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() Gene: Gria2, Glur2, Cacng2, Stg / Production host: ![]() #2: Chemical | ChemComp-ZK1 / {[ #3: Sugar | ChemComp-NAG / Compound details | The protein was expressed as a tandem fusion construct (GluA2 fused to stargazin, also named TARP- ...The protein was expressed as a tandem fusion construct (GluA2 fused to stargazin, also named TARP-y2 or cagcn2). However, this second protein which is covalently linked or fused to the C-terminus of GluA2 is not observed in chains B and D in this structure. | |
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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: Protein / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 8 |
Specimen | Conc.: 2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: Grid coated with gold prior to use. / Grid material: GOLD / Grid mesh size: 200 divisions/in. / Grid type: C-flat Au 1.2/1.3 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 295 K / Details: 3 blot force, 8.0 s blot time |
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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 |
Specimen holder | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 8 sec. / Electron dose: 80 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 Details: 40 frames were collected across 8 seconds per image. |
Image scans | Movie frames/image: 40 / Used frames/image: 1-40 |
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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: 7.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 10293 / Symmetry type: POINT |