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- PDB-8piv: Homomeric GluA2 flip R/G-unedited Q/R-edited F231A mutant in tand... -

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Basic information

Entry
Database: PDB / ID: 8piv
TitleHomomeric GluA2 flip R/G-unedited Q/R-edited F231A mutant in tandem with TARP gamma-2, desensitized conformation 1
Components
  • Glutamate receptor
  • Voltage-dependent calcium channel gamma-2 subunit
KeywordsMEMBRANE PROTEIN / AMPAR / ion channels / neurotransmission
Function / homology
Function and homology information


Presynaptic depolarization and calcium channel opening / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / neurotransmitter receptor transport, postsynaptic endosome to lysosome / LGI-ADAM interactions / Trafficking of AMPA receptors / regulation of AMPA receptor activity / neurotransmitter receptor internalization / channel regulator activity ...Presynaptic depolarization and calcium channel opening / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / neurotransmitter receptor transport, postsynaptic endosome to lysosome / LGI-ADAM interactions / Trafficking of AMPA receptors / regulation of AMPA receptor activity / neurotransmitter receptor internalization / channel regulator activity / membrane hyperpolarization / nervous system process / postsynaptic neurotransmitter receptor diffusion trapping / protein targeting to membrane / neurotransmitter receptor localization to postsynaptic specialization membrane / voltage-gated calcium channel complex / neuromuscular junction development / transmission of nerve impulse / regulation of postsynaptic membrane neurotransmitter receptor levels / membrane depolarization / AMPA glutamate receptor complex / calcium channel regulator activity / voltage-gated calcium channel activity / glutamate-gated receptor activity / somatodendritic compartment / ionotropic glutamate receptor binding / hippocampal mossy fiber to CA3 synapse / positive regulation of synaptic transmission, glutamatergic / regulation of membrane potential / postsynaptic density membrane / Schaffer collateral - CA1 synapse / response to calcium ion / postsynaptic membrane / glutamatergic synapse / cell surface
Similarity search - Function
Voltage-dependent calcium channel, gamma-2 subunit / PMP-22/EMP/MP20/Claudin family / Voltage-dependent calcium channel, gamma subunit / PMP-22/EMP/MP20/Claudin superfamily / 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 ...Voltage-dependent calcium channel, gamma-2 subunit / PMP-22/EMP/MP20/Claudin family / Voltage-dependent calcium channel, gamma subunit / PMP-22/EMP/MP20/Claudin superfamily / 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
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate / PALMITIC ACID / Chem-POV / Glutamate receptor / Voltage-dependent calcium channel gamma-2 subunit
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.46 Å
AuthorsZhang, D. / Krieger, J.M. / Yamashita, K. / Greger, I.H.
Funding support United Kingdom, European Union, 3items
OrganizationGrant numberCountry
Medical Research Council (MRC, United Kingdom)MC_U105174197 United Kingdom
Wellcome Trust223194/Z/21/Z United Kingdom
H2020 Marie Curie Actions of the European Commission101024130European Union
CitationJournal: Nature / Year: 2023
Title: Structural mobility tunes signalling of the GluA1 AMPA glutamate receptor.
Authors: Danyang Zhang / Josip Ivica / James M Krieger / Hinze Ho / Keitaro Yamashita / Imogen Stockwell / Rozbeh Baradaran / Ondrej Cais / Ingo H Greger /
Abstract: AMPA glutamate receptors (AMPARs), the primary mediators of excitatory neurotransmission in the brain, are either GluA2 subunit-containing and thus Ca-impermeable, or GluA2-lacking and Ca-permeable. ...AMPA glutamate receptors (AMPARs), the primary mediators of excitatory neurotransmission in the brain, are either GluA2 subunit-containing and thus Ca-impermeable, or GluA2-lacking and Ca-permeable. Despite their prominent expression throughout interneurons and glia, their role in long-term potentiation and their involvement in a range of neuropathologies, structural information for GluA2-lacking receptors is currently absent. Here we determine and characterize cryo-electron microscopy structures of the GluA1 homotetramer, fully occupied with TARPγ3 auxiliary subunits (GluA1/γ3). The gating core of both resting and open-state GluA1/γ3 closely resembles GluA2-containing receptors. However, the sequence-diverse N-terminal domains (NTDs) give rise to a highly mobile assembly, enabling domain swapping and subunit re-alignments in the ligand-binding domain tier that are pronounced in desensitized states. These transitions underlie the unique kinetic properties of GluA1. A GluA2 mutant (F231A) increasing NTD dynamics phenocopies this behaviour, and exhibits reduced synaptic responses, reflecting the anchoring function of the AMPAR NTD at the synapse. Together, this work underscores how the subunit-diverse NTDs determine subunit arrangement, gating properties and ultimately synaptic signalling efficiency among AMPAR subtypes.
History
DepositionJun 22, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0Aug 30, 2023Provider: repository / Type: Initial release
Revision 1.1Sep 13, 2023Group: Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.title / _citation.year
Revision 1.2Sep 20, 2023Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title ..._citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.3Oct 11, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Glutamate receptor
B: Glutamate receptor
C: Glutamate receptor
D: Glutamate receptor
E: Voltage-dependent calcium channel gamma-2 subunit
F: Voltage-dependent calcium channel gamma-2 subunit
G: Voltage-dependent calcium channel gamma-2 subunit
H: Voltage-dependent calcium channel gamma-2 subunit
hetero molecules


Theoretical massNumber of molelcules
Total (without water)546,48824
Polymers539,4678
Non-polymers7,02216
Water1086
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 2 types, 8 molecules ABCDEFGH

#1: Protein
Glutamate receptor /


Mass: 98984.062 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Gria2 / Production host: Homo sapiens (human) / References: UniProt: G3V914
#2: Protein
Voltage-dependent calcium channel gamma-2 subunit / Neuronal voltage-gated calcium channel gamma-2 subunit / Stargazin / Transmembrane AMPAR regulatory ...Neuronal voltage-gated calcium channel gamma-2 subunit / Stargazin / Transmembrane AMPAR regulatory protein gamma-2 / TARP gamma-2


Mass: 35882.656 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Cacng2, Stg / Production host: Homo sapiens (human) / References: UniProt: Q71RJ2

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Non-polymers , 4 types, 22 molecules

#3: Chemical
ChemComp-PLM / PALMITIC ACID / Palmitic acid


Mass: 256.424 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: C16H32O2
#4: Chemical
ChemComp-OLC / (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate / 1-Oleoyl-R-glycerol


Mass: 356.540 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C21H40O4
#5: Chemical
ChemComp-POV / (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / POPC / POPC


Mass: 760.076 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: C42H82NO8P / Comment: phospholipid*YM
#6: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 6 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN

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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

ComponentName: GluA2 irR F231A mutant AMPA receptor (R/G unedited) in tandem with TARP gamma 2 in complex with 1mM quisqualate
Type: COMPLEX
Details: C-terminus of GluA2 flip-r-R with F231A is connected to gamma-2 N-terminus via a linker sequence
Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Rattus norvegicus (Norway rat)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2400 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.46 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 55495 / Symmetry type: POINT
RefinementHighest resolution: 3.46 Å

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