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- EMDB-42522: Glycine-bound GluN1a-3A NMDA receptor -

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Basic information

Entry
Database: EMDB / ID: EMD-42522
TitleGlycine-bound GluN1a-3A NMDA receptor
Map data
Sample
  • Complex: Glycine-bound GluN1-3A NMDA receptor
    • Protein or peptide: Glutamate receptor ionotropic, NMDA 1
    • Protein or peptide: Glutamate receptor ionotropic, NMDA 3A
KeywordsChannel / receptor / MEMBRANE PROTEIN
Function / homology
Function and homology information


serine binding / negative regulation of dendritic spine development / glycine-gated cation channel activity / excitatory chemical synaptic transmission / Synaptic adhesion-like molecules / response to glycine / propylene metabolic process / glutamate receptor activity / regulation of monoatomic cation transmembrane transport / Assembly and cell surface presentation of NMDA receptors ...serine binding / negative regulation of dendritic spine development / glycine-gated cation channel activity / excitatory chemical synaptic transmission / Synaptic adhesion-like molecules / response to glycine / propylene metabolic process / glutamate receptor activity / regulation of monoatomic cation transmembrane transport / Assembly and cell surface presentation of NMDA receptors / NMDA glutamate receptor activity / Neurexins and neuroligins / neurotransmitter receptor complex / NMDA selective glutamate receptor complex / ligand-gated sodium channel activity / calcium ion transmembrane import into cytosol / glutamate binding / protein heterotetramerization / glycine binding / positive regulation of reactive oxygen species biosynthetic process / positive regulation of calcium ion transport into cytosol / Negative regulation of NMDA receptor-mediated neuronal transmission / Unblocking of NMDA receptors, glutamate binding and activation / monoatomic cation transmembrane transport / dendrite development / regulation of neuronal synaptic plasticity / Long-term potentiation / monoatomic cation transport / excitatory synapse / positive regulation of excitatory postsynaptic potential / monoatomic ion channel complex / synaptic cleft / prepulse inhibition / calcium ion homeostasis / glutamate-gated calcium ion channel activity / EPHB-mediated forward signaling / presynaptic modulation of chemical synaptic transmission / sodium ion transmembrane transport / Ras activation upon Ca2+ influx through NMDA receptor / ionotropic glutamate receptor signaling pathway / positive regulation of synaptic transmission, glutamatergic / protein phosphatase 2A binding / regulation of membrane potential / excitatory postsynaptic potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / synaptic transmission, glutamatergic / synaptic membrane / modulation of chemical synaptic transmission / postsynaptic density membrane / terminal bouton / brain development / visual learning / calcium ion transmembrane transport / regulation of synaptic plasticity / calcium channel activity / calcium ion transport / rhythmic process / synaptic vesicle / presynapse / signaling receptor activity / amyloid-beta binding / RAF/MAP kinase cascade / chemical synaptic transmission / dendritic spine / response to ethanol / postsynaptic membrane / calmodulin binding / neuron projection / postsynaptic density / neuronal cell body / synapse / dendrite / calcium ion binding / endoplasmic reticulum membrane / protein-containing complex binding / glutamatergic synapse / cell surface / positive regulation of transcription by RNA polymerase II / identical protein binding / membrane / plasma membrane / cytoplasm
Similarity search - Function
: / : / 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. ...: / : / 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 ionotropic, NMDA 1 / Glutamate receptor ionotropic, NMDA 3A
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.1 Å
AuthorsMichalski K / Furukawa H
Funding support United States, 4 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)NS11745 United States
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)MH085926 United States
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)F32MH121061 United States
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)NS113632 United States
CitationJournal: Sci Adv / Year: 2024
Title: Structure and function of GluN1-3A NMDA receptor excitatory glycine receptor channel.
Authors: Kevin Michalski / Hiro Furukawa /
Abstract: -methyl-d-aspartate receptors (NMDARs) and other ionotropic glutamate receptors (iGluRs) mediate most of the excitatory signaling in the mammalian brains in response to the neurotransmitter glutamate. ...-methyl-d-aspartate receptors (NMDARs) and other ionotropic glutamate receptors (iGluRs) mediate most of the excitatory signaling in the mammalian brains in response to the neurotransmitter glutamate. Uniquely, NMDARs composed of GluN1 and GluN3 are activated exclusively by glycine, the neurotransmitter conventionally mediating inhibitory signaling when it binds to pentameric glycine receptors. The GluN1-3 NMDARs are vital for regulating neuronal excitability, circuit function, and specific behaviors, yet our understanding of their functional mechanism at the molecular level has remained limited. Here, we present cryo-electron microscopy structures of GluN1-3A NMDARs bound to an antagonist, CNQX, and an agonist, glycine. The structures show a 1-3-1-3 subunit heterotetrameric arrangement and an unprecedented pattern of GluN3A subunit orientation shift between the glycine-bound and CNQX-bound structures. Site-directed disruption of the unique subunit interface in the glycine-bound structure mitigated desensitization. Our study provides a foundation for understanding the distinct structural dynamics of GluN3 that are linked to the unique function of GluN1-3 NMDARs.
History
DepositionOct 30, 2023-
Header (metadata) releaseApr 17, 2024-
Map releaseApr 17, 2024-
UpdateMay 28, 2025-
Current statusMay 28, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_42522.png

Downloads & links

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Map

FileDownload / File: emd_42522.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.86 Å/pix.
x 400 pix.
= 342.4 Å		0.86 Å/pix.
x 400 pix.
= 342.4 Å		0.86 Å/pix.
x 400 pix.
= 342.4 Å

Surface

Projections

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.856 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.149
Minimum - Maximum-1.3077737 - 2.1391118
Average (Standard dev.)0.00014304272 (±0.036993276)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 342.4 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_42522_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_42522_half_map_2.map
Projections & Slices
AxesZYX

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Histogram (log scale)

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Sample components

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Entire : Glycine-bound GluN1-3A NMDA receptor

EntireName: Glycine-bound GluN1-3A NMDA receptor
Components
  • Complex: Glycine-bound GluN1-3A NMDA receptor
    • Protein or peptide: Glutamate receptor ionotropic, NMDA 1
    • Protein or peptide: Glutamate receptor ionotropic, NMDA 3A

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Supramolecule #1: Glycine-bound GluN1-3A NMDA receptor

SupramoleculeName: Glycine-bound GluN1-3A NMDA receptor / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 400 KDa

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Macromolecule #1: Glutamate receptor ionotropic, NMDA 1

MacromoleculeName: Glutamate receptor ionotropic, NMDA 1 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 95.055695 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSTMHLLTFA LLFSCSFARA ASDPKIVNIG AVLSTRKHEQ MFREAVNQAN KRHGSWKIQL NATSVTHKPN AIQMALSVCE DLISSQVYA ILVSHPPTPN DHFTPTPVSY TAGFYRIPVL GLTTRMSIYS DKSIHLSFLR TVPPYSHQSS VWFEMMRVYS W NHIILLVS ...String:
MSTMHLLTFA LLFSCSFARA ASDPKIVNIG AVLSTRKHEQ MFREAVNQAN KRHGSWKIQL NATSVTHKPN AIQMALSVCE DLISSQVYA ILVSHPPTPN DHFTPTPVSY TAGFYRIPVL GLTTRMSIYS DKSIHLSFLR TVPPYSHQSS VWFEMMRVYS W NHIILLVS DDHEGRAAQK RLETLLEERE SKAEKVLQFD PGTKNVTALL MEAKELEARV IILSASEDDA ATVYRAAAML NM TGSGYVW LVGEREISGN ALRYAPDGIL GLQLINGKNE SAHISDAVGV VAQAVHELLE KENITDPPRG CVGNTNIWKT GPL FKRVLM SSKYADGVTG RVEFNEDGDR KFANYSIMNL QNRKLVQVGI YNGTHVIPND RKIIWPGGET EKPRGYQMST RLKI VTIHQ EPFVYVKPTM SDGTCKEEFT VNGDPVKKVI CTGPNDTSPG SPRHTVPQCC YGFCIDLLIK LARTMNFTYE VHLVA DGKF GTQERVNNSN KKEWNGMMGE LLSGQADMIV APLTINNERA QYIEFSKPFK YQGLTILVKK EIPRSTLDSF MQPFQS TLW LLVGLSVHVV AVMLYLLDRF SPFGRFKVNS EEEEEDALTL SSAMWFSWGV LLNSGIGEGA PRSFSARILG MVWAGFA MI IVASYTANLA AFLVLDRPEE RITGINDPRL RNPSDKFIYA TVKQSSVDIY FRRQVELSTM YRHMEKHNYE SAAEAIQA V RDNKLHAFIW DSAVLEFEAS QKCDLVTTGE LFFRSGFGIG MRKDSPWKQN VSLSILKSHE NGFMEDLDKT WVRYQECDS RSNAPATLTC ENMAGVFMLV AGGIVAGIFL IFIEIAYKRH KDANGAQ

UniProtKB: Glutamate receptor ionotropic, NMDA 1

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Macromolecule #2: Glutamate receptor ionotropic, NMDA 3A

MacromoleculeName: Glutamate receptor ionotropic, NMDA 3A / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 104.837195 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: CQILKRIGHA VRVGAVHLQP WTTAPRAASR APDDSRAGAQ RDEPEPGTRR SPAPSPGARW LGSTLHGRGP PGSRKPGEGA RAEALWPRD ALLFAVDNLN RVEGLLPYNL SLEVVMAIEA GLGDLPLLPF SSPSSPWSSD PFSFLQSVCH TVVVQGVSAL L AFPQSQGE ...String:
CQILKRIGHA VRVGAVHLQP WTTAPRAASR APDDSRAGAQ RDEPEPGTRR SPAPSPGARW LGSTLHGRGP PGSRKPGEGA RAEALWPRD ALLFAVDNLN RVEGLLPYNL SLEVVMAIEA GLGDLPLLPF SSPSSPWSSD PFSFLQSVCH TVVVQGVSAL L AFPQSQGE MMELDLVSLV LHIPVISIVR HEFPRESQNP LHLQLSLENS LSSDADVTVS ILTMNNWYNF SLLLCQEDWN IT DFLLLTQ NNSKFHLGSI INITANLPST QDLLSFLQIQ LESIKNSTPT VVMFGCDMES IRRIFEITTQ FGVMPPELRW VLG DSQNVE ELRTEGLPLG LIAHGKTTQS VFEHYVQDAM ELVARAVATA TMIQPELALI PSTMNCMEVE TTNLTSGQYL SRFL ANTTF RGLSGSIRVK GSTIVSSENN FFIWNLQHDP MGKPMWTRLG SWQGGKIVMD YGIWPEQAQR HKTHFQHPSK LHLRV VTLI EHPFVFTREV DDEGLCPAGQ LCLDPMTNDS STLDSLFSSL HSSNDTVPIK FKKCCYGYCI DLLEKIAEDM NFDFDL YIV GDGKYGAWKN GHWTGLVGDL LRGTAHMAVT SFSINTARSQ VIDFTSPFFS TSLGILVRTR DTAAPIGAFM WPLHWCM WL GIFVALHITA VFLTLYEWKS PFGLTPKGRN RSKVFSFSSA LNICYALLFG RTVAIKPPKC WTGRFLMNLW AIFCMFCL S TYTANLAAVM VGEKIYEELS GIHDPKLHHP SQGFRFGTVR ESSAEDYVRQ SFPEMHEYMR RYNVPATPDG VEYLKNDPE KLDAFIMDKA LLDYEVSIDA DCKLLTVGKP FAIEGYGIGL PPNSPLTANI SELISQYKSH GFMDMLHDKW YRVVPCGKRS FAVTETLQM GIKHFSGLFV LLCIGFGLSI LTTIGEHIVY RLLLPRIKNK STETSQVAPA

UniProtKB: Glutamate receptor ionotropic, NMDA 3A

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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: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 60.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: OTHER / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.8 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: NONE
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 225900
Initial angle assignmentType: RANDOM ASSIGNMENT
Final angle assignmentType: RANDOM ASSIGNMENT

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