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- EMDB-17692: Homomeric GluA2 flip R/G-unedited Q/R-edited F231A mutant in tand... -

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Basic information

Entry
Database: EMDB / ID: EMD-17692
TitleHomomeric GluA2 flip R/G-unedited Q/R-edited F231A mutant in tandem with TARP gamma-2, desensitized conformation 1
Map data
Sample
  • Complex: GluA2 irR F231A mutant AMPA receptor (R/G unedited) in tandem with TARP gamma 2 in complex with 1mM quisqualate
    • Protein or peptide: Glutamate receptor
    • Protein or peptide: Voltage-dependent calcium channel gamma-2 subunit
  • Ligand: PALMITIC ACID
  • Ligand: (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
  • Ligand: water
KeywordsAMPAR / ion channels / neurotransmission / MEMBRANE PROTEIN
Function / homology
Function and homology information


inorganic cation transmembrane transporter 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 ...inorganic cation transmembrane transporter 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 / membrane hyperpolarization / postsynaptic neurotransmitter receptor diffusion trapping / nervous system process / protein targeting to membrane / voltage-gated calcium channel complex / neurotransmitter receptor localization to postsynaptic specialization membrane / neuromuscular junction development / transmission of nerve impulse / channel regulator activity / regulation of postsynaptic membrane neurotransmitter receptor levels / AMPA glutamate receptor complex / membrane depolarization / 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 / 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 / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site / Ligand-gated ion channel ...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 / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site / Ligand-gated ion channel / : / 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
Glutamate receptor / Voltage-dependent calcium channel gamma-2 subunit
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.46 Å
AuthorsZhang D / Krieger JM / Yamashita K / Greger IH
Funding support United Kingdom, European Union, 3 items
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, 2023-
Header (metadata) releaseAug 30, 2023-
Map releaseAug 30, 2023-
UpdateNov 13, 2024-
Current statusNov 13, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_17692.png

Downloads & links

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Map

FileDownload / File: emd_17692.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.45 Å/pix.
x 256 pix.
= 370.048 Å		1.45 Å/pix.
x 256 pix.
= 370.048 Å		1.45 Å/pix.
x 256 pix.
= 370.048 Å

Surface

Projections

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.4455 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.2
Minimum - Maximum-0.8524957 - 1.7751006
Average (Standard dev.)-0.00059982843 (±0.04518151)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 370.048 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_17692_half_map_1.map
Projections & Slices
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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_17692_half_map_2.map
Projections & Slices
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Histogram (log scale)

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Sample components

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Entire : GluA2 irR F231A mutant AMPA receptor (R/G unedited) in tandem wit...

EntireName: GluA2 irR F231A mutant AMPA receptor (R/G unedited) in tandem with TARP gamma 2 in complex with 1mM quisqualate
Components
  • Complex: GluA2 irR F231A mutant AMPA receptor (R/G unedited) in tandem with TARP gamma 2 in complex with 1mM quisqualate
    • Protein or peptide: Glutamate receptor
    • Protein or peptide: Voltage-dependent calcium channel gamma-2 subunit
  • Ligand: PALMITIC ACID
  • Ligand: (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
  • Ligand: water

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Supramolecule #1: GluA2 irR F231A mutant AMPA receptor (R/G unedited) in tandem wit...

SupramoleculeName: GluA2 irR F231A mutant AMPA receptor (R/G unedited) in tandem with TARP gamma 2 in complex with 1mM quisqualate
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Details: C-terminus of GluA2 flip-r-R with F231A is connected to gamma-2 N-terminus via a linker sequence
Source (natural)Organism: Rattus norvegicus (Norway rat)

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Macromolecule #1: Glutamate receptor

MacromoleculeName: Glutamate receptor / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Rattus norvegicus (Norway rat)
Molecular weightTheoretical: 98.984062 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MQKIMHISVL LSPVLWGLIF GVSSNSIQIG GLFPRGADQE YSAFRVGMVQ FSTSEFRLTP HIDNLEVANS FAVTNAFCSQ FSRGVYAIF GFYDKKSVNT ITSFCGTLHV SFITPSFPTD GTHPFVIQMR PDLKGALLSL IEYYQWDKFA YLYDSDRGLS T LQAVLDSA ...String:
MQKIMHISVL LSPVLWGLIF GVSSNSIQIG GLFPRGADQE YSAFRVGMVQ FSTSEFRLTP HIDNLEVANS FAVTNAFCSQ FSRGVYAIF GFYDKKSVNT ITSFCGTLHV SFITPSFPTD GTHPFVIQMR PDLKGALLSL IEYYQWDKFA YLYDSDRGLS T LQAVLDSA AEKKWQVTAI NVGNINNDKK DETYRSLFQD LELKKERRVI LDCERDKVND IVDQVITIGK HVKGYHYIIA NL GFTDGDL LKIQFGGANV SGFQIVDYDD SLVSKFIERW STLEEKEYPG AHTATIKYTS ALTYDAVQVM TEAFRNLRKQ RIE ISRRGN AGDCLANPAV PWGQGVEIER ALKQVQVEGL SGNIKFDQNG KRINYTINIM ELKTNGPRKI GYWSEVDKMV VTLT ELPSG NDTSGLENKT VVVTTILESP YVMMKKNHEM LEGNERYEGY CVDLAAEIAK HCGFKYKLTI VGDGKYGARD ADTKI WNGM VGELVYGKAD IAIAPLTITL VREEVIDFSK PFMSLGISIM IKKPQKSKPG VFSFLDPLAY EIWMCIVFAY IGVSVV LFL VSRFSPYEWH TEEFEDGRET QSSESTNEFG IFNSLWFSLG AFMRQGCDIS PRSLSGRIVG GVWWFFTLII ISSYTAN LA AFLTVERMVS PIESAEDLSK QTEIAYGTLD SGSTKEFFRR SKIAVFDKMW TYMRSAEPSV FVRTTAEGVA RVRKSKGK Y AYLLESTMNE YIEQRKPCDT MKVGGNLDSK GYGIATPKGS SLRTPVNLAV LKLSEQGVLD KLKNKWWYDK GECGAKDSG SKEKTSALSL SNVAGVFYIL VGGLGLAMLV ALIEFCYKSR AEAKRMKVAK NPQNINPSSS QNSQNFATYK EGYNVYGIES VKI

UniProtKB: Glutamate receptor

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Macromolecule #2: Voltage-dependent calcium channel gamma-2 subunit

MacromoleculeName: Voltage-dependent calcium channel gamma-2 subunit / type: protein_or_peptide / ID: 2 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Rattus norvegicus (Norway rat)
Molecular weightTheoretical: 35.882656 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MGLFDRGVQM LLTTVGAFAA FSLMTIAVGT DYWLYSRGVC KTKSVSENET SKKNEEVMTH SGLWRTCCLE GNFKGLCKQI DHFPEDADY EADTAEYFLR AVRASSIFPI LSVILLFMGG LCIAASEFYK TRHNIILSAG IFFVSAGLSN IIGIIVYISA N AGDPSKSD ...String:
MGLFDRGVQM LLTTVGAFAA FSLMTIAVGT DYWLYSRGVC KTKSVSENET SKKNEEVMTH SGLWRTCCLE GNFKGLCKQI DHFPEDADY EADTAEYFLR AVRASSIFPI LSVILLFMGG LCIAASEFYK TRHNIILSAG IFFVSAGLSN IIGIIVYISA N AGDPSKSD SKKNSYSYGW SFYFGALSFI IAEMVGVLAV HMFIDRHKQL TATARATDYL QASAITRIPS YRYRYQRRSR SS SRSTEPS HSRDASPVGV KGFNTLPSTE ISMYTLSRDP LKAATTPTAT YNSDRDNSFL QVHNCIQKDS KDSLHANTAN RRT TPV

UniProtKB: Voltage-dependent calcium channel gamma-2 subunit

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Macromolecule #3: PALMITIC ACID

MacromoleculeName: PALMITIC ACID / type: ligand / ID: 3 / Number of copies: 7 / Formula: PLM
Molecular weightTheoretical: 256.424 Da
Chemical component information

ChemComp-PLM:
PALMITIC ACID

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Macromolecule #4: (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate

MacromoleculeName: (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate / type: ligand / ID: 4 / Number of copies: 4 / Formula: OLC
Molecular weightTheoretical: 356.54 Da
Chemical component information

ChemComp-OLC:
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate

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Macromolecule #5: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(tri...

MacromoleculeName: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
type: ligand / ID: 5 / Number of copies: 5 / Formula: POV
Molecular weightTheoretical: 760.076 Da
Chemical component information

ChemComp-POV:
(2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / phospholipid*YM

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Macromolecule #6: water

MacromoleculeName: water / type: ligand / ID: 6 / Number of copies: 6 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.4 µm / Nominal defocus min: 1.2 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.46 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 55495
Initial angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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