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- EMDB-28051: Local refined map of the LBD region of Human GluN1a-GluN2D NMDA r... -

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Basic information

Entry
Database: EMDB / ID: EMD-28051
TitleLocal refined map of the LBD region of Human GluN1a-GluN2D NMDA receptor
Map data
Sample
  • Complex: Hetero-tetrameric GluN1a-GluN2D NMDA receptors
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.26 Å
AuthorsKang H / Furukawa H
Funding support United States, 2 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)NS111745 United States
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)MH085926 United States
CitationJournal: Mol Cell / Year: 2022
Title: Structural insights into assembly and function of GluN1-2C, GluN1-2A-2C, and GluN1-2D NMDARs.
Authors: Tsung-Han Chou / Hyunook Kang / Noriko Simorowski / Stephen F Traynelis / Hiro Furukawa /
Abstract: Neurotransmission mediated by diverse subtypes of N-methyl-D-aspartate receptors (NMDARs) is fundamental for basic brain functions and development as well as neuropsychiatric diseases and disorders. ...Neurotransmission mediated by diverse subtypes of N-methyl-D-aspartate receptors (NMDARs) is fundamental for basic brain functions and development as well as neuropsychiatric diseases and disorders. NMDARs are glycine- and glutamate-gated ion channels that exist as heterotetramers composed of obligatory GluN1 and GluN2(A-D) and/or GluN3(A-B). The GluN2C and GluN2D subunits form ion channels with distinct properties and spatio-temporal expression patterns. Here, we provide the structures of the agonist-bound human GluN1-2C NMDAR in the presence and absence of the GluN2C-selective positive allosteric potentiator (PAM), PYD-106, the agonist-bound GluN1-2A-2C tri-heteromeric NMDAR, and agonist-bound GluN1-2D NMDARs by single-particle electron cryomicroscopy. Our analysis shows unique inter-subunit and domain arrangements of the GluN2C NMDARs, which contribute to functional regulation and formation of the PAM binding pocket and is distinct from GluN2D NMDARs. Our findings here provide the fundamental blueprint to study GluN2C- and GluN2D-containing NMDARs, which are uniquely involved in neuropsychiatric disorders.
History
DepositionSep 7, 2022-
Header (metadata) releaseDec 7, 2022-
Map releaseDec 7, 2022-
UpdateDec 14, 2022-
Current statusDec 14, 2022Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_28051.png

Downloads & links

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Map

FileDownload / File: emd_28051.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.86 Å/pix.
x 400 pix.
= 342.4 Å		0.86 Å/pix.
x 400 pix.
= 342.4 Å		0.86 Å/pix.
x 400 pix.
= 342.4 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.856 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.2
Minimum - Maximum-0.8151273 - 1.2579536
Average (Standard dev.)-0.00015630893 (±0.02284796)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 342.4 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_28051_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_28051_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Hetero-tetrameric GluN1a-GluN2D NMDA receptors

EntireName: Hetero-tetrameric GluN1a-GluN2D NMDA receptors
Components
  • Complex: Hetero-tetrameric GluN1a-GluN2D NMDA receptors

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Supramolecule #1: Hetero-tetrameric GluN1a-GluN2D NMDA receptors

SupramoleculeName: Hetero-tetrameric GluN1a-GluN2D NMDA receptors / type: complex / Chimera: Yes / ID: 1 / Parent: 0
Source (natural)Organism: Homo sapiens (human)

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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

Concentration4 mg/mL
BufferpH: 7.5
VitrificationCryogen name: ETHANE / Chamber humidity: 85 % / Chamber temperature: 285 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 74.7 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.4 µm / Nominal defocus min: 0.6 µm
Sample stageCooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 8012932
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

7saa

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.26 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 3.3.2) / Number images used: 199693
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 3.3.2)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 3.3.2)

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Atomic model buiding 1

Initial model
PDB IDChain

3oel

chain_id: A

7saa

RefinementProtocol: RIGID BODY FIT

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