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- EMDB-25844: Cryo-EM structure of GluN1b-2B NMDAR complexed to Fab2 non-active... -

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Basic information

Entry
Database: EMDB / ID: EMD-25844
TitleCryo-EM structure of GluN1b-2B NMDAR complexed to Fab2 non-active1-like
Map data
Sample
  • Complex: GluN1b-2B NMDAR - Fab2
    • Protein or peptide: Glutamate receptor ionotropic, NMDA 1
    • Protein or peptide: Glutamate receptor ionotropic, NMDA 2B
    • Protein or peptide: Fab2 heavy chain
    • Protein or peptide: Fab2 light chain
KeywordsChannel / antibody / SIGNALING PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


cellular response to curcumin / cellular response to corticosterone stimulus / cellular response to magnesium starvation / sensory organ development / pons maturation / positive regulation of Schwann cell migration / regulation of cell communication / EPHB-mediated forward signaling / sensitization / auditory behavior ...cellular response to curcumin / cellular response to corticosterone stimulus / cellular response to magnesium starvation / sensory organ development / pons maturation / positive regulation of Schwann cell migration / regulation of cell communication / EPHB-mediated forward signaling / sensitization / auditory behavior / Assembly and cell surface presentation of NMDA receptors / response to hydrogen sulfide / olfactory learning / conditioned taste aversion / dendritic branch / regulation of respiratory gaseous exchange / response to other organism / protein localization to postsynaptic membrane / regulation of ARF protein signal transduction / transmitter-gated monoatomic ion channel activity / fear response / apical dendrite / positive regulation of inhibitory postsynaptic potential / response to methylmercury / response to glycine / propylene metabolic process / response to carbohydrate / response to manganese ion / interleukin-1 receptor binding / cellular response to dsRNA / response to glycoside / positive regulation of glutamate secretion / negative regulation of dendritic spine maintenance / cellular response to lipid / response to growth hormone / regulation of monoatomic cation transmembrane transport / heterocyclic compound binding / NMDA glutamate receptor activity / Synaptic adhesion-like molecules / RAF/MAP kinase cascade / voltage-gated monoatomic cation channel activity / neurotransmitter receptor complex / NMDA selective glutamate receptor complex / ligand-gated sodium channel activity / glutamate binding / response to morphine / regulation of axonogenesis / calcium ion transmembrane import into cytosol / neuromuscular process / regulation of dendrite morphogenesis / protein heterotetramerization / male mating behavior / glycine binding / regulation of synapse assembly / response to amine / receptor clustering / parallel fiber to Purkinje cell synapse / small molecule binding / regulation of cAMP/PKA signal transduction / suckling behavior / startle response / positive regulation of reactive oxygen species biosynthetic process / monoatomic cation transmembrane transport / behavioral response to pain / positive regulation of calcium ion transport into cytosol / response to magnesium ion / regulation of postsynaptic membrane potential / regulation of neuron apoptotic process / regulation of MAPK cascade / action potential / associative learning / cellular response to glycine / extracellularly glutamate-gated ion channel activity / monoatomic cation transport / excitatory synapse / social behavior / positive regulation of dendritic spine maintenance / response to electrical stimulus / regulation of neuronal synaptic plasticity / monoatomic ion channel complex / positive regulation of excitatory postsynaptic potential / cellular response to manganese ion / glutamate receptor binding / Unblocking of NMDA receptors, glutamate binding and activation / response to mechanical stimulus / long-term memory / detection of mechanical stimulus involved in sensory perception of pain / behavioral fear response / multicellular organismal response to stress / synaptic cleft / neuron development / prepulse inhibition / postsynaptic density, intracellular component / phosphatase binding / monoatomic cation channel activity / calcium ion homeostasis / response to fungicide / glutamate-gated receptor activity / D2 dopamine receptor binding / regulation of long-term synaptic depression
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 2B
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.23 Å
AuthorsTajima N / Furukawa H
Funding support United States, 2 items
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: Nat Commun / Year: 2022
Title: Development and characterization of functional antibodies targeting NMDA receptors.
Authors: Nami Tajima / Noriko Simorowski / Remy A Yovanno / Michael C Regan / Kevin Michalski / Ricardo Gómez / Albert Y Lau / Hiro Furukawa /
Abstract: N-methyl-D-aspartate receptors (NMDARs) are critically involved in basic brain functions and neurodegeneration as well as tumor invasiveness. Targeting specific subtypes of NMDARs with distinct ...N-methyl-D-aspartate receptors (NMDARs) are critically involved in basic brain functions and neurodegeneration as well as tumor invasiveness. Targeting specific subtypes of NMDARs with distinct activities has been considered an effective therapeutic strategy for neurological disorders and diseases. However, complete elimination of off-target effects of small chemical compounds has been challenging and thus, there is a need to explore alternative strategies for targeting NMDAR subtypes. Here we report identification of a functional antibody that specifically targets the GluN1-GluN2B NMDAR subtype and allosterically down-regulates ion channel activity as assessed by electrophysiology. Through biochemical analysis, x-ray crystallography, single-particle electron cryomicroscopy, and molecular dynamics simulations, we show that this inhibitory antibody recognizes the amino terminal domain of the GluN2B subunit and increases the population of the non-active conformational state. The current study demonstrates that antibodies may serve as specific reagents to regulate NMDAR functions for basic research and therapeutic objectives.
History
DepositionJan 4, 2022-
Header (metadata) releaseMar 2, 2022-
Map releaseMar 2, 2022-
UpdateOct 16, 2024-
Current statusOct 16, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 3
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 3
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  • Surface view with fitted model
  • Atomic models: PDB-7teb
  • Surface level: 3
  • Imaged by UCSF Chimera
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Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_25844.png

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Map

FileDownload / File: emd_25844.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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AxesZ (Sec.)Y (Row.)X (Col.)
1.37 Å/pix.
x 256 pix.
= 350.72 Å		1.37 Å/pix.
x 256 pix.
= 350.72 Å		1.37 Å/pix.
x 256 pix.
= 350.72 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.37 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 3.0 / Movie #1: 3
Minimum - Maximum-2.018686 - 9.078976000000001
Average (Standard dev.)0.054323822 (±0.46898952)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 350.72 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.371.371.37
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z350.720350.720350.720
α/β/γ90.00090.00090.000
start NX/NY/NZ535455
NX/NY/NZ134138134
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-2.0199.0790.054

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Supplemental data

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Additional map: #1

Fileemd_25844_additional_1.map
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Half map: #1

Fileemd_25844_half_map_1.map
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Half map: #2

Fileemd_25844_half_map_2.map
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Sample components

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Entire : GluN1b-2B NMDAR - Fab2

EntireName: GluN1b-2B NMDAR - Fab2
Components
  • Complex: GluN1b-2B NMDAR - Fab2
    • Protein or peptide: Glutamate receptor ionotropic, NMDA 1
    • Protein or peptide: Glutamate receptor ionotropic, NMDA 2B
    • Protein or peptide: Fab2 heavy chain
    • Protein or peptide: Fab2 light chain

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Supramolecule #1: GluN1b-2B NMDAR - Fab2

SupramoleculeName: GluN1b-2B NMDAR - Fab2 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Rattus norvegicus (Norway rat)

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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: Rattus norvegicus (Norway rat)
Molecular weightTheoretical: 96.944891 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSTMHLLTFA LLFSCSFARA ASDPKIVNIG AVLSTRKHEQ MFREAVNQAN KRHGSWKIQL QATSVTHKPN AIQMALSVCE DLISSQVYA ILVSHPPTPN DHFTPTPVSY TAGFYRIPVL GLTTRMSIYS DKSIHLSFLR TVPPYSHQSS VWFEMMRVYN W NHIILLVS ...String:
MSTMHLLTFA LLFSCSFARA ASDPKIVNIG AVLSTRKHEQ MFREAVNQAN KRHGSWKIQL QATSVTHKPN AIQMALSVCE DLISSQVYA ILVSHPPTPN DHFTPTPVSY TAGFYRIPVL GLTTRMSIYS DKSIHLSFLR TVPPYSHQSS VWFEMMRVYN W NHIILLVS DDHEGRAAQK RLETLLEERE SKSKKRNYEN LDQLSYDNKR GPKAEKVLQF DPGTKNVTAL LMEARELEAR VI ILSASED DAATVYRAAA MLDMTGSGYV WLVGEREISG NALRYAPDGI IGLQLINGKN ESAHISDAVG VVAQAVHELL EKE NITDPP RGCVGNTNIW KTGPLFKRVL MSSKYADGVT GRVEFNEDGD RKFAQYSIMN LQNRKLVQVG IYNGTHVIPN DRKI IWPGG ETEKPRGYQM STRLKIVTIH QEPFVYVKPT MSDGTCKEEF TVNGDPVKKV ICTGPNDTSP GSPRHTVPQC CYGFC IDLL IKLARTMQFT YEVHLVADGK FGTQERVQNS NKKEWNGMMG ELLSGQADMI VAPLTINNER AQYIEFSKPF KYQGLT ILV KKEIPRSTLD SFMQPFQSTL WLLVGLSVHV VAVMLYLLDR FSPFGRFKVN SQSESTDALT LSSAMWFSWG VLLNSGI GE GAPRSFSARI LGMVWAGFAM IIVASYTANL AAFLVLDRPE ERITGINDPR LRNPSDKFIY ATVKQSSVDI YFRRQVEL S TMYRHMEKHN YESAAEAIQA VRDNKLHAFI WDSAVLEFEA SQKCDLVTTG ELFFRSGFGI GMRKDSPWKQ QVSLSILKS HENGFMEDLD KTWVRYQECD SRSNAPATLT CENMAGVFML VAGGIVAGIF LIFIEIAYKS RA

UniProtKB: Glutamate receptor ionotropic, NMDA 1

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Macromolecule #2: Glutamate receptor ionotropic, NMDA 2B

MacromoleculeName: Glutamate receptor ionotropic, NMDA 2B / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Rattus norvegicus (Norway rat)
Molecular weightTheoretical: 98.79782 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGTMRLFLLA VLFLFSFARA TGWSHPQFEK GGGSGGGSGG SAWSHPQFEK GALVPRGRSQ KSPPSIGIAV ILVGTSDEVA IKDAHEKDD FHHLSVVPRV ELVAMNETDP KSIITRICDL MSDRKIQGVV FADDTDQEAI AQILDFISAQ TLTPILGIHG G SSMIMADK ...String:
MGTMRLFLLA VLFLFSFARA TGWSHPQFEK GGGSGGGSGG SAWSHPQFEK GALVPRGRSQ KSPPSIGIAV ILVGTSDEVA IKDAHEKDD FHHLSVVPRV ELVAMNETDP KSIITRICDL MSDRKIQGVV FADDTDQEAI AQILDFISAQ TLTPILGIHG G SSMIMADK DESSMFFQFG PSIEQQASVM LNIMEEYDWY IFSIVTTYFP GYQDFVNKIR STIENSFVGW ELEEVLLLDM SL DDGDSKI QNQLKKLQSP IILLYCTKEE ATYIFEVANS VGLTGYGYTW IVPSLVAGDT DTVPSEFPTG LISVSYDEWD YGL PARVRD GIAIITTAAS DMLSEHSFIP EPKSSCYNTH EKRIYQSNML NRYLINVTFE GRDLSFSEDG YQMHPKLVII LLNK ERKWE RVGKWKDKSL QMKYYVWPRM CPETEEQEDD HLSIVTLEEA PFVIVESVDP LSGTCMRNTV PCQKRIISEN KTDEE PGYI KKCCKGFCID ILKKISKSVK FTYDLYLVTN GKHGKKINGT WNGMIGEVVM KRAYMAVGSL TINEERSEVV DFSVPF IET GISVMVSRSN GTVSPSAFLE PFSACVWVMM FVMLLIVSAV AVFVFEYFSP VGYNRSLADG REPGGPSVTI GKAIWLL WG LVFNNSVPVQ NPKGTTSKIM VSVWAFFAVI FLASYTANLA AFMIQEEYVD QVSGLSDKKF QRPNDFSPPF RFGTVPNG S TERNIRNNYA EMHAYMGKFN QRGVDDALLS LKTGKLDAFI YDAAVLNYMA GRDEGCKLVT IGSGKVFAST GYGIAIQKD SGWKRQVDLA ILQLFGDGEM EELEALWLTG ICHNEKNEVM SSQLDIDNMA GVFYMLGAAM ALSLITFISE HLFYWQFRHS FMG

UniProtKB: Glutamate receptor ionotropic, NMDA 2B

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Macromolecule #3: Fab2 heavy chain

MacromoleculeName: Fab2 heavy chain / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 23.914781 KDa
SequenceString: DVKLQESGGG LVQPGGSLKL SCAASGFTFS SYTMSWVRQT PEKRLEWVAY ISNGGGGTYY PDTVKGRFTI SRDNAKNTLY LQMNSLKED TAMYYCARPS RGGSSYWYFD VWGAGTTVTV SSAKTTPPSV YPLAPGSAAQ TNSMVTLGCL VKGYFPEPVT V TWNSGSLS ...String:
DVKLQESGGG LVQPGGSLKL SCAASGFTFS SYTMSWVRQT PEKRLEWVAY ISNGGGGTYY PDTVKGRFTI SRDNAKNTLY LQMNSLKED TAMYYCARPS RGGSSYWYFD VWGAGTTVTV SSAKTTPPSV YPLAPGSAAQ TNSMVTLGCL VKGYFPEPVT V TWNSGSLS SGVHTFPAVL QSDLYTLSSS VTVPSSTWPS ETVTCNVAHP ASSTKVDKKI VPRDC

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Macromolecule #4: Fab2 light chain

MacromoleculeName: Fab2 light chain / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 23.572031 KDa
SequenceString: DIQMTQSPSS LSASLGGKVT ITCKASQDIN KYIAWYQHKP GKGPRLLIHY TSSLQPGIPS RFSGSGSGRD YSFSISNLEP EDIATYYCL QYDNLYTFGG GTKLEIKRAD AAPTVSIFPP SSEQLTSGGA SVVCFLNNFY PKDINVKWKI DGSERQNGVL N SWTDQDSK ...String:
DIQMTQSPSS LSASLGGKVT ITCKASQDIN KYIAWYQHKP GKGPRLLIHY TSSLQPGIPS RFSGSGSGRD YSFSISNLEP EDIATYYCL QYDNLYTFGG GTKLEIKRAD AAPTVSIFPP SSEQLTSGGA SVVCFLNNFY PKDINVKWKI DGSERQNGVL N SWTDQDSK DSTYSMSSTL TLTKDEYERH NSYTCEATHK TSTSPIVKSF NRNES

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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 BIOQUANTUM (6k x 4k) / Average electron dose: 65.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: OTHER / Nominal defocus max: 3.5 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.23 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 30424
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: MAXIMUM LIKELIHOOD

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