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- PDB-9c7e: Diheteromeric GluN1/GluN2A (delM653) in nanodisc complex with gly... -

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Basic information

Entry
Database: PDB / ID: 9c7e
TitleDiheteromeric GluN1/GluN2A (delM653) in nanodisc complex with glycine, glutamate, and GNE-4123, open conformation, C2 symmetry
Components
  • Glutamate receptor ionotropic, NMDA 1,Green fluorescent protein chimera
  • Glutamate receptor ionotropic, NMDA 2A,Green fluorescent protein chimera
KeywordsTRANSPORT PROTEIN / ion channel / NMDA / positive allosteric modulator / open pore conformation
Function / homology
Function and homology information


neurotransmitter receptor transport, plasma membrane to endosome / regulation of response to alcohol / response to ammonium ion / receptor recycling / response to environmental enrichment / directional locomotion / positive regulation of Schwann cell migration / pons maturation / regulation of cell communication / EPHB-mediated forward signaling ...neurotransmitter receptor transport, plasma membrane to endosome / regulation of response to alcohol / response to ammonium ion / receptor recycling / response to environmental enrichment / directional locomotion / positive regulation of Schwann cell migration / pons maturation / regulation of cell communication / EPHB-mediated forward signaling / Assembly and cell surface presentation of NMDA receptors / response to hydrogen sulfide / auditory behavior / olfactory learning / conditioned taste aversion / dendritic branch / regulation of respiratory gaseous exchange / regulation of ARF protein signal transduction / response to other organism / protein localization to postsynaptic membrane / cellular response to magnesium ion / serotonin metabolic process / transmitter-gated monoatomic ion channel activity / positive regulation of inhibitory postsynaptic potential / response to methylmercury / suckling behavior / response to manganese ion / response to glycine / response to carbohydrate / propylene metabolic process / sleep / dendritic spine organization / cellular response to dsRNA / locomotion / regulation of NMDA receptor activity / cellular response to lipid / RAF/MAP kinase cascade / regulation of monoatomic cation transmembrane transport / NMDA glutamate receptor activity / Synaptic adhesion-like molecules / response to glycoside / voltage-gated monoatomic cation channel activity / NMDA selective glutamate receptor complex / glutamate binding / neurotransmitter receptor complex / ligand-gated sodium channel activity / response to morphine / glutamate receptor signaling pathway / regulation of axonogenesis / calcium ion transmembrane import into cytosol / neuromuscular process / regulation of dendrite morphogenesis / protein heterotetramerization / male mating behavior / regulation of synapse assembly / spinal cord development / response to amine / glycine binding / cellular response to zinc ion / startle response / positive regulation of reactive oxygen species biosynthetic process / dopamine metabolic process / parallel fiber to Purkinje cell synapse / response to lithium ion / monoatomic cation transmembrane transport / positive regulation of calcium ion transport into cytosol / cellular response to glycine / regulation of postsynaptic membrane potential / response to light stimulus / modulation of excitatory postsynaptic potential / action potential / associative learning / conditioned place preference / positive regulation of dendritic spine maintenance / monoatomic ion channel complex / regulation of neuronal synaptic plasticity / monoatomic cation transport / social behavior / positive regulation of protein targeting to membrane / glutamate receptor binding / Unblocking of NMDA receptors, glutamate binding and activation / long-term memory / synaptic cleft / neuron development / phosphatase binding / prepulse inhibition / positive regulation of synaptic transmission, glutamatergic / multicellular organismal response to stress / postsynaptic density, intracellular component / monoatomic cation channel activity / response to fungicide / calcium ion homeostasis / glutamate-gated receptor activity / regulation of neuron apoptotic process / cell adhesion molecule binding / cellular response to manganese ion / glutamate-gated calcium ion channel activity / presynaptic active zone membrane / neurogenesis / dendrite membrane
Similarity search - Function
Glutamate [NMDA] receptor, epsilon subunit, C-terminal / N-methyl D-aspartate receptor 2B3 C-terminus / : / : / Green fluorescent protein, GFP / 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 / : / : / Green fluorescent protein, GFP / 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 / : / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein / 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
: / DODECANE / CHOLESTEROL HEMISUCCINATE / Glutamate receptor ionotropic, NMDA 1 / Green fluorescent protein / Glutamate receptor ionotropic, NMDA 2A
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
Aequorea victoria (jellyfish)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.22 Å
AuthorsJalali-Yazdi, F. / Kim, J. / Gouaux, E.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS) United States
CitationJournal: Sci Adv / Year: 2025
Title: Cryo-EM snapshots of NMDA receptor activation illuminate sequential rearrangements.
Authors: Jamie A Abbott / Junhoe Kim / Beiying Liu / Gabriela K Popescu / Eric Gouaux / Farzad Jalali-Yazdi /
Abstract: Canonical -methyl-d-aspartate receptors (NMDARs) are glutamate-gated ion channels with critical roles in the development and function of the nervous system. The excitatory currents they produce ...Canonical -methyl-d-aspartate receptors (NMDARs) are glutamate-gated ion channels with critical roles in the development and function of the nervous system. The excitatory currents they produce reflect stochastic transitions between multiple agonist-bound closed- and open-pore states. We leveraged the intrinsically high open probability () of NMDARs composed of GluN1 and GluN2A subunits, together with judiciously chosen mutants and ligands, to achieve conditions in which receptors had a near unity. Using single-particle cryo-electron microscopy (cryo-EM), we captured three activated receptor states, each with distinct conformations of the gate-forming M3 helices. Separately, we carried out single-channel electrophysiology, together with statistical modeling, to relate the cryo-EM structures to the gating reaction. NMDAR channel opening involves bending of the pore-forming M3 helices to produce a transient open-channel conformation, subsequently stabilized by new interactions between the D2-M3 linkers with the pre-M1 helices and the pre-M4 loops, to yield the stable open channel.
History
DepositionJun 10, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 24, 2025Provider: repository / Type: Initial release
Revision 1.1Feb 4, 2026Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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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,Green fluorescent protein chimera
B: Glutamate receptor ionotropic, NMDA 2A,Green fluorescent protein chimera
C: Glutamate receptor ionotropic, NMDA 1,Green fluorescent protein chimera
D: Glutamate receptor ionotropic, NMDA 2A,Green fluorescent protein chimera
hetero molecules


Theoretical massNumber of molelcules
Total (without water)506,34714
Polymers502,2314
Non-polymers4,11610
Water00
1


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

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Components

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


Mass: 124759.219 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat), (gene. exp.) Aequorea victoria (jellyfish)
Gene: Grin1, Nmdar1, GFP / Production host: Homo sapiens (human) / References: UniProt: P35439, UniProt: P42212
#2: Protein Glutamate receptor ionotropic, NMDA 2A,Green fluorescent protein chimera / GluN2A / Glutamate [NMDA] receptor subunit epsilon-1 / N-methyl D-aspartate receptor subtype 2A / ...GluN2A / Glutamate [NMDA] receptor subunit epsilon-1 / N-methyl D-aspartate receptor subtype 2A / NMDAR2A / NR2A


Mass: 126356.180 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat), (gene. exp.) Aequorea victoria (jellyfish)
Gene: Grin2a, GFP / Production host: Homo sapiens (human) / References: UniProt: Q00959, UniProt: P42212
#3: Chemical ChemComp-A1AUV / 4-cyclohexyl-N-[(8R)-2-cyclopropyl-7-hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]benzene-1-sulfonamide


Mass: 427.520 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C21H25N5O3S / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical
ChemComp-Y01 / CHOLESTEROL HEMISUCCINATE


Mass: 486.726 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C31H50O4 / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical ChemComp-D12 / DODECANE


Mass: 170.335 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C12H26
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: Diheteromeric NMDA receptor GluN1/GluN2A in nanodisc, in complex with glycine, glutamate, and GNE-4123, processed in C2 symmetry
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.502 MDa / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Rattus norvegicus (Norway rat)10116
31Aequorea victoria (jellyfish)6100
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 9
SpecimenConc.: 2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: 15 mA / Grid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/1
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 291 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: 2000 nm / Nominal defocus min: 800 nm
Image recordingAverage exposure time: 1.8 sec. / Electron dose: 53 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Num. of real images: 8048

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Processing

EM software
IDNameCategory
2SerialEMimage acquisition
7UCSF Chimeramodel fitting
9PHENIXmodel refinement
10cryoSPARCinitial Euler assignment
11cryoSPARCfinal Euler assignment
13cryoSPARC3D reconstruction
CTF correctionType: NONE
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 3.22 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 179000 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00326050
ELECTRON MICROSCOPYf_angle_d0.6435378
ELECTRON MICROSCOPYf_dihedral_angle_d5.1443508
ELECTRON MICROSCOPYf_chiral_restr0.0473972
ELECTRON MICROSCOPYf_plane_restr0.0044462

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