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- PDB-8jiz: Cryo-EM structure of GluN1-2A NMDAR in complex with human Fab5F6 ... -

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Basic information

Entry
Database: PDB / ID: 8jiz
TitleCryo-EM structure of GluN1-2A NMDAR in complex with human Fab5F6 in two fab bind conformation
Components
  • (Glutamate receptor ionotropic, NMDA ...) x 2
  • Fab5F6 Heavy Chain
  • Fab5F6 Light Chain
KeywordsMEMBRANE PROTEIN / NMDAR / autoimmune encephalitis
Function / homology
Function and homology information


glycine-gated cation channel activity / excitatory chemical synaptic transmission / directional locomotion / Synaptic adhesion-like molecules / serotonin metabolic process / protein localization to postsynaptic membrane / sleep / response to glycine / propylene metabolic process / regulation of monoatomic cation transmembrane transport ...glycine-gated cation channel activity / excitatory chemical synaptic transmission / directional locomotion / Synaptic adhesion-like molecules / serotonin metabolic process / protein localization to postsynaptic membrane / sleep / response to glycine / propylene metabolic process / regulation of monoatomic cation transmembrane transport / Assembly and cell surface presentation of NMDA receptors / NMDA glutamate receptor activity / neurotransmitter receptor complex / NMDA selective glutamate receptor complex / Neurexins and neuroligins / ligand-gated sodium channel activity / glutamate binding / glutamate receptor signaling pathway / calcium ion transmembrane import into cytosol / protein heterotetramerization / glycine binding / startle response / positive regulation of reactive oxygen species biosynthetic process / monoatomic cation transmembrane transport / Negative regulation of NMDA receptor-mediated neuronal transmission / dopamine metabolic process / Unblocking of NMDA receptors, glutamate binding and activation / positive regulation of calcium ion transport into cytosol / Long-term potentiation / monoatomic cation transport / excitatory synapse / regulation of neuronal synaptic plasticity / monoatomic ion channel complex / positive regulation of excitatory postsynaptic potential / synaptic cleft / calcium ion homeostasis / MECP2 regulates neuronal receptors and channels / glutamate-gated calcium ion channel activity / neurogenesis / EPHB-mediated forward signaling / sensory perception of pain / sodium ion transmembrane transport / response to amphetamine / ionotropic glutamate receptor signaling pathway / positive regulation of synaptic transmission, glutamatergic / Ras activation upon Ca2+ influx through NMDA receptor / cytoplasmic vesicle membrane / excitatory postsynaptic potential / regulation of membrane potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / synaptic transmission, glutamatergic / synaptic membrane / protein catabolic process / postsynaptic density membrane / negative regulation of protein catabolic process / brain development / calcium ion transmembrane transport / visual learning / regulation of synaptic plasticity / response to wounding / long-term synaptic potentiation / memory / terminal bouton / synaptic vesicle / signaling receptor activity / amyloid-beta binding / presynaptic membrane / RAF/MAP kinase cascade / response to ethanol / chemical synaptic transmission / dendritic spine / postsynaptic membrane / learning or memory / neuron projection / calmodulin binding / postsynaptic density / positive regulation of apoptotic process / response to xenobiotic stimulus / 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
Glutamate receptor ionotropic, NMDA 1 / Glutamate receptor ionotropic, NMDA 2A
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å
AuthorsWang, H. / Zhu, S.
Funding support China, 5items
OrganizationGrant numberCountry
Other government2022ZD0212700 China
Other governmentLG 202106-02 China
Other government2017YFA0505700 China
Other governmentXDBS01020000 China
Other government2018SHZDZX05 China
CitationJournal: Nat Struct Mol Biol / Year: 2024
Title: Structural basis for antibody-mediated NMDA receptor clustering and endocytosis in autoimmune encephalitis.
Authors: Han Wang / Chun Xie / Bo Deng / Jinjun Ding / Na Li / Zengwei Kou / Mengmeng Jin / Jie He / Qinrui Wang / Han Wen / Jinbao Zhang / Qinming Zhou / Sheng Chen / Xiangjun Chen / Ti-Fei Yuan / Shujia Zhu /
Abstract: Antibodies against N-methyl-D-aspartate receptors (NMDARs) are most frequently detected in persons with autoimmune encephalitis (AE) and used as diagnostic biomarkers. Elucidating the structural ...Antibodies against N-methyl-D-aspartate receptors (NMDARs) are most frequently detected in persons with autoimmune encephalitis (AE) and used as diagnostic biomarkers. Elucidating the structural basis of monoclonal antibody (mAb) binding to NMDARs would facilitate the development of targeted therapy for AE. Here, we reconstructed nanodiscs containing green fluorescent protein-fused NMDARs to label and sort individual immune B cells from persons with AE and further cloned and identified mAbs against NMDARs. This allowed cryo-electron microscopy analysis of NMDAR-Fab complexes, revealing that autoantibodies bind to the R1 lobe of the N-terminal domain of the GluN1 subunit. Small-angle X-ray scattering studies demonstrated NMDAR-mAb stoichiometry of 2:1 or 1:2, structurally suitable for mAb-induced clustering and endocytosis of NMDARs. Importantly, these mAbs reduced the surface NMDARs and NMDAR-mediated currents, without tonically affecting NMDAR channel gating. These structural and functional findings imply that the design of neutralizing antibody binding to the R1 lobe of NMDARs represents a potential therapy for AE treatment.
History
DepositionMay 29, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jun 5, 2024Provider: repository / Type: Initial release
Revision 1.1Sep 11, 2024Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update
Revision 1.2Oct 30, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification
Revision 1.3Dec 25, 2024Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID / _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 2A
B: Glutamate receptor ionotropic, NMDA 1
C: Glutamate receptor ionotropic, NMDA 2A
D: Glutamate receptor ionotropic, NMDA 1
E: Fab5F6 Heavy Chain
F: Fab5F6 Light Chain
G: Fab5F6 Heavy Chain
H: Fab5F6 Light Chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)489,76821
Polymers485,8778
Non-polymers3,89213
Water00
1


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

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Components

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Glutamate receptor ionotropic, NMDA ... , 2 types, 4 molecules ACBD

#1: Protein Glutamate receptor ionotropic, NMDA 2A / 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 / hNR2A


Mass: 94136.016 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GRIN2A, NMDAR2A / Production host: Homo sapiens (human) / References: UniProt: Q12879
#2: Protein Glutamate receptor ionotropic, NMDA 1 / GluN1 / Glutamate [NMDA] receptor subunit zeta-1 / N-methyl-D-aspartate receptor subunit NR1 / NMD-R1


Mass: 95236.078 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GRIN1, NMDAR1 / Production host: Homo sapiens (human) / References: UniProt: Q05586

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Antibody , 2 types, 4 molecules EGFH

#3: Antibody Fab5F6 Heavy Chain


Mass: 27654.051 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#4: Antibody Fab5F6 Light Chain


Mass: 25912.125 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)

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Sugars , 2 types, 13 molecules

#5: 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.: 5
Source method: isolated from a genetically manipulated source
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.: 8 / Source method: obtained synthetically / Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
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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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: Cryo-EM structure of GluN1-2A NMDAR in complex with human Fab23
Type: CELL / Entity ID: #1-#4 / Source: NATURAL
Source (natural)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 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: 2500 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameCategory
4RELIONCTF correction
10RELIONinitial Euler assignment
11RELIONfinal Euler assignment
12RELIONclassification
13RELION3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 295623 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00131706
ELECTRON MICROSCOPYf_angle_d0.41543039
ELECTRON MICROSCOPYf_dihedral_angle_d10.30111389
ELECTRON MICROSCOPYf_chiral_restr0.044920
ELECTRON MICROSCOPYf_plane_restr0.0035433

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