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- PDB-9oou: Glycine/Glutamate/EU 1622-240 rGluN1a-2B NMDAR -

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Basic information

Entry
Database: PDB / ID: 9oou
TitleGlycine/Glutamate/EU 1622-240 rGluN1a-2B NMDAR
Components(Glutamate receptor ionotropic, NMDA ...) x 2
KeywordsMEMBRANE PROTEIN / Ion Channels / NMDAR
Function / homology
Function and homology information


cellular response to corticosterone stimulus / cellular response to magnesium starvation / sensory organ development / cellular response to curcumin / regulation of cAMP/PKA signal transduction / pons maturation / EPHB-mediated forward signaling / Assembly and cell surface presentation of NMDA receptors / regulation of cell communication / auditory behavior ...cellular response to corticosterone stimulus / cellular response to magnesium starvation / sensory organ development / cellular response to curcumin / regulation of cAMP/PKA signal transduction / pons maturation / EPHB-mediated forward signaling / Assembly and cell surface presentation of NMDA receptors / regulation of cell communication / auditory behavior / positive regulation of Schwann cell migration / sensitization / olfactory learning / response to other organism / response to hydrogen sulfide / dendritic branch / fear response / conditioned taste aversion / response to methylmercury / protein localization to postsynaptic membrane / regulation of ARF protein signal transduction / regulation of respiratory gaseous exchange / response to manganese ion / apical dendrite / transmitter-gated monoatomic ion channel activity / suckling behavior / interleukin-1 receptor binding / positive regulation of inhibitory postsynaptic potential / response to carbohydrate / cellular response to lipid / propylene metabolic process / response to glycine / cellular response to dsRNA / RAF/MAP kinase cascade / negative regulation of dendritic spine maintenance / response to amine / response to growth hormone / heterocyclic compound binding / neurotransmitter receptor complex / response to glycoside / Synaptic adhesion-like molecules / regulation of monoatomic cation transmembrane transport / NMDA glutamate receptor activity / voltage-gated monoatomic cation channel activity / NMDA selective glutamate receptor complex / glutamate binding / ligand-gated sodium channel activity / positive regulation of glutamate secretion / neuromuscular process / regulation of axonogenesis / calcium ion transmembrane import into cytosol / regulation of dendrite morphogenesis / male mating behavior / regulation of synapse assembly / protein heterotetramerization / response to morphine / small molecule binding / glycine binding / receptor clustering / startle response / positive regulation of reactive oxygen species biosynthetic process / parallel fiber to Purkinje cell synapse / regulation of MAPK cascade / monoatomic ion channel complex / behavioral response to pain / regulation of postsynaptic membrane potential / monoatomic cation transmembrane transport / action potential / response to electrical stimulus / positive regulation of calcium ion transport into cytosol / extracellularly glutamate-gated ion channel activity / cellular response to glycine / associative learning / positive regulation of dendritic spine maintenance / response to magnesium ion / Unblocking of NMDA receptors, glutamate binding and activation / regulation of neuronal synaptic plasticity / monoatomic cation transport / glutamate receptor binding / detection of mechanical stimulus involved in sensory perception of pain / social behavior / ligand-gated monoatomic ion channel activity / response to mechanical stimulus / multicellular organismal response to stress / neuron development / phosphatase binding / long-term memory / prepulse inhibition / postsynaptic density, intracellular component / behavioral fear response / monoatomic cation channel activity / synaptic cleft / response to fungicide / calcium ion homeostasis / cellular response to manganese ion / glutamate-gated receptor activity / regulation of long-term synaptic depression / positive regulation of synaptic transmission, glutamatergic / D2 dopamine receptor binding / glutamate-gated calcium ion channel activity
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 / Ligand-gated ion channel / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site / : ...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 / 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
: / CHOLESTEROL / Chem-POV / Glutamate receptor ionotropic, NMDA 1 / Glutamate receptor ionotropic, NMDA 2B
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.34 Å
AuthorsSteigerwald, R. / Furukawa, H.
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: Nature / Year: 2025
Title: Mechanism of conductance control and neurosteroid binding in NMDA receptors.
Authors: Hyunook Kang / Ruben Steigerwald / Elijah Z Ullman / Max Epstein / Srinu Paladugu / Dennis C Liotta / Stephen F Traynelis / Hiro Furukawa /
Abstract: Ion-channel activity reflects a combination of open probability and unitary conductance. Many channels display subconductance states that modulate signalling strength, yet the structural mechanisms ...Ion-channel activity reflects a combination of open probability and unitary conductance. Many channels display subconductance states that modulate signalling strength, yet the structural mechanisms governing conductance levels remain incompletely understood. Here we report that conductance levels are controlled by the bending patterns of pore-forming transmembrane helices in the heterotetrameric neuronal channel GluN1a-2B N-methyl-D-aspartate receptor (NMDAR). Our single-particle electron cryomicroscopy (cryo-EM) analyses demonstrate that an endogenous neurosteroid and synthetic positive allosteric modulator (PAM), 24S-hydroxycholesterol (24S-HC), binds to a juxtamembrane pocket in the GluN2B subunit and stabilizes the fully open-gate conformation, where GluN1a M3 and GluN2B M3' pore-forming helices are bent to dilate the channel pore. By contrast, EU1622-240 binds to the same GluN2B juxtamembrane pocket and a distinct juxtamembrane pocket in GluN1a to stabilize a sub-open state whereby only the GluN2B M3' helix is bent. Consistent with the varying extents of gate opening, the single-channel recordings predominantly show full-conductance and subconductance states in the presence of 24S-HC and EU1622-240, respectively. Another class of neurosteroid, pregnenolone sulfate, engages a similar GluN2B pocket, but two molecules bind simultaneously, revealing a diverse neurosteroid recognition pattern. Our study identifies that the juxtamembrane pockets are critical structural hubs for modulating conductance levels in NMDAR.
History
DepositionMay 16, 2025Deposition site: RCSB / Processing site: RCSB
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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 2B
hetero molecules


Theoretical massNumber of molelcules
Total (without water)387,65612
Polymers383,4504
Non-polymers4,2078
Water32418
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 ... , 2 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: 95225.883 Da / Num. of mol.: 2
Mutation: N61Q, N239D, N350Q, N471Q, N491Q, N771Q, R844Q, R845G, K846A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Grin1, Nmdar1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P35439
#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


Mass: 96498.977 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Grin2b / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q00960

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Non-polymers , 4 types, 26 molecules

#3: Chemical ChemComp-POV / (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / POPC


Mass: 760.076 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C42H82NO8P / Comment: phospholipid*YM
#4: Chemical
ChemComp-A1AFT / (5M)-5-(3-bromo-4-fluorophenyl)-6-ethynyl-3-[2-(3-fluoro-3-methylazetidin-1-yl)-2-oxoethyl]thieno[2,3-d]pyrimidin-4(3H)-one


Mass: 478.310 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C20H14BrF2N3O2S / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C27H46O
#6: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 18 / Source method: isolated from a natural source / Formula: H2O

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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: CELL / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Di-heteromeric GluN1a-2B NMDA receptor / Type: CELL / Entity ID: #1-#2 / Source: NATURAL
Source (natural)Organism: Rattus norvegicus (Norway rat)
Buffer solutionpH: 7.5
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 FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 600 nm
Image recordingElectron dose: 58.4 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARCparticle selection
2PHENIX1.20.1_4487model refinement
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 3.34 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 382882 / Symmetry type: POINT
RefinementHighest resolution: 3.34 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.01113492
ELECTRON MICROSCOPYf_angle_d0.79918320
ELECTRON MICROSCOPYf_dihedral_angle_d8.7431912
ELECTRON MICROSCOPYf_chiral_restr0.0522078
ELECTRON MICROSCOPYf_plane_restr0.0062282

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