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- PDB-9d3b: Gly-,Glu-,(S)-DQP-997-74 bound GluN1a-2B-2D NMDAR -

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Basic information

Entry
Database: PDB / ID: 9d3b
TitleGly-,Glu-,(S)-DQP-997-74 bound GluN1a-2B-2D NMDAR
Components(Glutamate receptor ionotropic, NMDA ...) x 3
KeywordsMEMBRANE PROTEIN / N-methyl-D-aspartate receptor / (S)-DQP-997-74 / GluN2B / GluN2D
Function / homology
Function and homology information


glycine-gated cation channel activity / regulation of sensory perception of pain / excitatory chemical synaptic transmission / Activated NTRK2 signals through FYN / Synaptic adhesion-like molecules / cellular response to L-glutamate / response to glycine / propylene metabolic process / negative regulation of dendritic spine maintenance / regulation of monoatomic cation transmembrane transport ...glycine-gated cation channel activity / regulation of sensory perception of pain / excitatory chemical synaptic transmission / Activated NTRK2 signals through FYN / Synaptic adhesion-like molecules / cellular response to L-glutamate / response to glycine / propylene metabolic process / negative regulation of dendritic spine maintenance / regulation of monoatomic cation transmembrane transport / Assembly and cell surface presentation of NMDA receptors / NMDA glutamate receptor activity / voltage-gated monoatomic cation channel activity / Neurexins and neuroligins / neurotransmitter receptor complex / NMDA selective glutamate receptor complex / ligand-gated sodium channel activity / calcium ion transmembrane import into cytosol / glutamate receptor signaling pathway / 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 / startle response / Unblocking of NMDA receptors, glutamate binding and activation / monoatomic cation transmembrane transport / 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 / glutamate-gated receptor activity / calcium ion homeostasis / MECP2 regulates neuronal receptors and channels / presynaptic active zone membrane / glutamate-gated calcium ion channel activity / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / EPHB-mediated forward signaling / sodium ion transmembrane transport / Ras activation upon Ca2+ influx through NMDA receptor / ionotropic glutamate receptor signaling pathway / positive regulation of synaptic transmission, glutamatergic / hippocampal mossy fiber to CA3 synapse / adult locomotory behavior / 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 / postsynaptic density membrane / terminal bouton / brain development / visual learning / calcium ion transmembrane transport / regulation of synaptic plasticity / long-term synaptic potentiation / late endosome / synaptic vesicle / signaling receptor activity / amyloid-beta binding / RAF/MAP kinase cascade / chemical synaptic transmission / dendritic spine / response to ethanol / postsynaptic membrane / cytoskeleton / learning or memory / lysosome / calmodulin binding / neuron projection / postsynaptic density / synapse / dendrite / calcium ion binding / endoplasmic reticulum membrane / protein-containing complex binding / glutamatergic synapse / cell surface / positive regulation of transcription by RNA polymerase II / zinc ion binding / plasma membrane / cytoplasm
Similarity search - Function
Glutamate [NMDA] receptor, epsilon subunit, C-terminal / N-methyl D-aspartate receptor 2B3 C-terminus / : / : / 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 / : ...Glutamate [NMDA] receptor, epsilon subunit, C-terminal / N-methyl D-aspartate receptor 2B3 C-terminus / : / : / 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
: / GLUTAMIC ACID / GLYCINE / Glutamate receptor ionotropic, NMDA 2D / Glutamate receptor ionotropic, NMDA 1 / Glutamate receptor ionotropic, NMDA 2B
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.71 Å
AuthorsHyunook, K. / Hiro, F.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)MH085926 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)NS111745 United States
CitationJournal: Neuron / Year: 2025
Title: Structural basis for channel gating and blockade in tri-heteromeric GluN1-2B-2D NMDA receptor.
Authors: Hyunook Kang / Max Epstein / Tue G Banke / Riley Perszyk / Noriko Simorowski / Srinu Paladugu / Dennis C Liotta / Stephen F Traynelis / Hiro Furukawa /
Abstract: Discrete activation of N-methyl-D-aspartate receptor (NMDAR) subtypes by glutamate and the co-agonist glycine is fundamental to neuroplasticity. A distinct variant, the tri-heteromeric receptor, ...Discrete activation of N-methyl-D-aspartate receptor (NMDAR) subtypes by glutamate and the co-agonist glycine is fundamental to neuroplasticity. A distinct variant, the tri-heteromeric receptor, comprising glycine-binding GluN1 and two types of glutamate-binding GluN2 subunits, exhibits unique pharmacological characteristics, notably enhanced sensitivity to the anti-depressant channel blocker S-(+)-ketamine. Despite its significance, the structural mechanisms underlying ligand gating and channel blockade of tri-heteromeric NMDARs remain poorly understood. Here, we identify and characterize tri-heteromeric GluN1-2B-2D NMDAR in the adult brain, resolving its structures in the activated, inhibited, and S-(+)-ketamine-blocked states. These structures reveal the ligand-dependent conformational dynamics that modulate the tension between the extracellular domain and transmembrane channels, governing channel gating and blockade. Additionally, we demonstrate that the inhibitor (S)-DQP-997-74 selectively decouples linker tension in GluN2D, offering insights into subtype-selective targeting for cognitive modulation.
History
DepositionAug 9, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 26, 2025Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: Additional map / Part number: 2 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: Additional map / Part number: 3 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Mar 5, 2025Group: Data collection / Database references / Category: citation / em_admin
Item: _citation.pdbx_database_id_PubMed / _citation.title / _em_admin.last_update
Revision 1.1Mar 5, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Database references / Experimental summary / Data content type: EM metadata / EM metadata / Category: citation / em_admin / Data content type: EM metadata / EM metadata / EM metadata
Item: _citation.pdbx_database_id_PubMed / _citation.title / _em_admin.last_update
Revision 1.2Apr 16, 2025Group: Data collection / Database references / Category: citation / em_admin
Item: _citation.journal_volume / _citation.page_first / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Glutamate receptor ionotropic, NMDA 1
B: Glutamate receptor ionotropic, NMDA 2B
C: Glutamate receptor ionotropic, NMDA 1
D: Glutamate receptor ionotropic, NMDA 2D
hetero molecules


Theoretical massNumber of molelcules
Total (without water)380,23113
Polymers378,1264
Non-polymers2,1059
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Glutamate receptor ionotropic, NMDA ... , 3 types, 4 molecules ACBD

#1: Protein Glutamate receptor ionotropic, NMDA 1 / GluN1 / Glutamate [NMDA] receptor subunit zeta-1 / N-methyl-D-aspartate receptor subunit NR1 / NMD-R1


Mass: 92691.828 Da / Num. of mol.: 2 / Mutation: R844N, R845G, K846A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GRIN1, NMDAR1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q05586
#2: Protein Glutamate receptor ionotropic, NMDA 2B / GluN2B / Glutamate [NMDA] receptor subunit epsilon-2 / N-methyl D-aspartate receptor subtype 2B / ...GluN2B / Glutamate [NMDA] receptor subunit epsilon-2 / N-methyl D-aspartate receptor subtype 2B / NMDAR2B / NR2B / N-methyl-D-aspartate receptor subunit 3 / NR3 / hNR3


Mass: 98622.172 Da / Num. of mol.: 1 / Mutation: C588S, C838S, C849S
Source method: isolated from a genetically manipulated source
Details: Twin-Strep tag (WSHPQFEKGGGSGGGSGGSAWSHPQFEKGALVPRG) C-terminal p2A tag (GSGATNFSLLKQAGDVEENPG)
Source: (gene. exp.) Homo sapiens (human) / Gene: GRIN2B, NMDAR2B / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q13224
#3: Protein Glutamate receptor ionotropic, NMDA 2D / GluN2D / EB11 / Glutamate [NMDA] receptor subunit epsilon-4 / N-methyl D-aspartate receptor subtype ...GluN2D / EB11 / Glutamate [NMDA] receptor subunit epsilon-4 / N-methyl D-aspartate receptor subtype 2D / NMDAR2D / NR2D


Mass: 94120.609 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: 1D4-tag (TETSQVAPA) / Source: (gene. exp.) Homo sapiens (human) / Gene: GRIN2D, GluN2D, NMDAR2D / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: O15399

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Sugars , 2 types, 4 molecules

#4: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1 / Source method: obtained synthetically
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#6: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 3 types, 5 molecules

#5: Chemical ChemComp-GLY / GLYCINE


Type: peptide linking / Mass: 75.067 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C2H5NO2 / Feature type: SUBJECT OF INVESTIGATION
#7: Chemical ChemComp-GLU / GLUTAMIC ACID


Type: L-peptide linking / Mass: 147.129 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C5H9NO4 / Feature type: SUBJECT OF INVESTIGATION
#8: Chemical ChemComp-A1A15 / 4-{(3R,5S)-5-(4-chlorophenyl)-3-[4-(4-chlorophenyl)-2-oxo-1,2-dihydroquinolin-3-yl]pyrazolidin-1-yl}-3,3-difluoro-4-oxobutanoic acid


Mass: 572.387 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C28H21Cl2F2N3O4 / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY
Has protein modificationY

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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: tri-heteromeric GluN1-2B-2D NMDAR / Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT
Molecular weightValue: 0.377 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.5
SpecimenConc.: 2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 278 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 800 nm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 61 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 14 eV

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Processing

EM software
IDNameCategory
1cryoSPARCparticle selection
2EPUimage acquisition
4cryoSPARCCTF correction
7PHENIXmodel fitting
9PHENIXmodel refinement
13cryoSPARC3D reconstruction
CTF correctionType: NONE
Particle selectionNum. of particles selected: 1317548
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.71 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 100870 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model building

3D fitting-ID: 1 / Source name: PDB / Type: experimental model

IDPDB-IDPdb chain-IDAccession codeChain-IDInitial refinement model-ID
17saa

7saa

A7saaA1
27saa

7saa

B7saaB1
37saa

7saa

C7saaC1
48.0E+96D8.0E+96D2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00224305
ELECTRON MICROSCOPYf_angle_d0.56133026
ELECTRON MICROSCOPYf_dihedral_angle_d4.0493328
ELECTRON MICROSCOPYf_chiral_restr0.0423776
ELECTRON MICROSCOPYf_plane_restr0.0034202

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