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- EMDB-22221: SARS-CoV-2 HexaPro S One RBD up -

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Basic information

Entry
Database: EMDB / ID: EMD-22221
TitleSARS-CoV-2 HexaPro S One RBD up
Map data
SamplePrefusion-stabilized SARS-CoV-2 spike trimer with a single RBD up:
Spike glycoproteinSpike protein / ligand
Function / homology
Function and homology information


Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / suppression by virus of host tetherin activity / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / Attachment and Entry / receptor-mediated virion attachment to host cell / endoplasmic reticulum-Golgi intermediate compartment / host cell surface receptor binding / endocytosis involved in viral entry into host cell ...Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / suppression by virus of host tetherin activity / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / Attachment and Entry / receptor-mediated virion attachment to host cell / endoplasmic reticulum-Golgi intermediate compartment / host cell surface receptor binding / endocytosis involved in viral entry into host cell / endocytic vesicle membrane / fusion of virus membrane with host plasma membrane / suppression by virus of host type I interferon-mediated signaling pathway / fusion of virus membrane with host endosome membrane / viral entry into host cell / viral envelope / endoplasmic reticulum lumen / host cell plasma membrane / virion membrane / integral component of membrane / identical protein binding
Similarity search - Function
Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Spike glycoprotein S2, coronavirus, heptad repeat 2 / Spike glycoprotein S2, coronavirus, heptad repeat 1 / Spike glycoprotein, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus ...Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Spike glycoprotein S2, coronavirus, heptad repeat 2 / Spike glycoprotein S2, coronavirus, heptad repeat 1 / Spike glycoprotein, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike receptor binding domain superfamily, coronavirus / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2 / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal
Similarity search - Domain/homology
Biological speciesSevere acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 3.21 Å
AuthorsWrapp D / Hsieh C-L / Goldsmith JA / McLellan JS
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)R01-AI127521 United States
CitationJournal: bioRxiv / Year: 2020
Title: Structure-based Design of Prefusion-stabilized SARS-CoV-2 Spikes.
Authors: Ching-Lin Hsieh / Jory A Goldsmith / Jeffrey M Schaub / Andrea M DiVenere / Hung-Che Kuo / Kamyab Javanmardi / Kevin C Le / Daniel Wrapp / Alison Gene-Wei Lee / Yutong Liu / Chia-Wei Chou / ...Authors: Ching-Lin Hsieh / Jory A Goldsmith / Jeffrey M Schaub / Andrea M DiVenere / Hung-Che Kuo / Kamyab Javanmardi / Kevin C Le / Daniel Wrapp / Alison Gene-Wei Lee / Yutong Liu / Chia-Wei Chou / Patrick O Byrne / Christy K Hjorth / Nicole V Johnson / John Ludes-Meyers / Annalee W Nguyen / Juyeon Park / Nianshuang Wang / Dzifa Amengor / Jennifer A Maynard / Ilya J Finkelstein / Jason S McLellan /
Abstract: The COVID-19 pandemic caused by the novel coronavirus SARS-CoV-2 has led to accelerated efforts to develop therapeutics, diagnostics, and vaccines to mitigate this public health emergency. A key ...The COVID-19 pandemic caused by the novel coronavirus SARS-CoV-2 has led to accelerated efforts to develop therapeutics, diagnostics, and vaccines to mitigate this public health emergency. A key target of these efforts is the spike (S) protein, a large trimeric class I fusion protein that is metastable and difficult to produce recombinantly in large quantities. Here, we designed and expressed over 100 structure-guided spike variants based upon a previously determined cryo-EM structure of the prefusion SARS-CoV-2 spike. Biochemical, biophysical and structural characterization of these variants identified numerous individual substitutions that increased protein yields and stability. The best variant, HexaPro, has six beneficial proline substitutions leading to ~10-fold higher expression than its parental construct and is able to withstand heat stress, storage at room temperature, and multiple freeze-thaws. A 3.2 Å-resolution cryo-EM structure of HexaPro confirmed that it retains the prefusion spike conformation. High-yield production of a stabilized prefusion spike protein will accelerate the development of vaccines and serological diagnostics for SARS-CoV-2.
History
DepositionJun 26, 2020-
Header (metadata) releaseJul 15, 2020-
Map releaseJul 15, 2020-
UpdateSep 30, 2020-
Current statusSep 30, 2020Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.45
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.45
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6xkl
  • Surface level: 0.45
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

Downloads & links

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Map

FileDownload / File: emd_22221.map.gz / Format: CCP4 / Size: 307.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.08 Å/pix.
x 432 pix.
= 466.56 Å
1.08 Å/pix.
x 432 pix.
= 466.56 Å
1.08 Å/pix.
x 432 pix.
= 466.56 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.08 Å
Density
Contour LevelBy AUTHOR: 0.45 / Movie #1: 0.45
Minimum - Maximum-0.051597334 - 7.3103304
Average (Standard dev.)0.0008916123 (±0.06322199)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions432432432
Spacing432432432
CellA=B=C: 466.56003 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.081.081.08
M x/y/z432432432
origin x/y/z0.0000.0000.000
length x/y/z466.560466.560466.560
α/β/γ90.00090.00090.000
start NX/NY/NZ434333
NX/NY/NZ116118137
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS432432432
D min/max/mean-0.0527.3100.001

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Supplemental data

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Additional map: Full map unsharpened

Fileemd_22221_additional.map
AnnotationFull map unsharpened
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: Half-map A

Fileemd_22221_half_map_1.map
AnnotationHalf-map A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: Half-map B

Fileemd_22221_half_map_2.map
AnnotationHalf-map B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Sample components

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Entire Prefusion-stabilized SARS-CoV-2 spike trimer with a single RBD up

EntireName: Prefusion-stabilized SARS-CoV-2 spike trimer with a single RBD up
Number of Components: 3

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Component #1: protein, Prefusion-stabilized SARS-CoV-2 spike trimer with a sing...

ProteinName: Prefusion-stabilized SARS-CoV-2 spike trimer with a single RBD up
Recombinant expression: No
MassExperimental: 600 kDa
SourceSpecies: Severe acute respiratory syndrome coronavirus 2
Source (engineered)Expression System: Homo sapiens (human)

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Component #2: protein, Spike glycoprotein

ProteinName: Spike glycoproteinSpike protein / Number of Copies: 3 / Recombinant expression: No
MassTheoretical: 142.427438 kDa
SourceSpecies: Severe acute respiratory syndrome coronavirus 2
Source (engineered)Expression System: Homo sapiens (human)

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Component #3: ligand, 2-acetamido-2-deoxy-beta-D-glucopyranose

LigandName: 2-acetamido-2-deoxy-beta-D-glucopyranose / Number of Copies: 28 / Recombinant expression: No
MassTheoretical: 0.221208 kDa

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Experimental details

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Sample preparation

SpecimenSpecimen State: Particle / Method: cryo EM
Sample solutionSpecimen conc.: 0.35 mg/mL / pH: 8
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen Name: ETHANE / Temperature: 277.15 K / Humidity: 100 %

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
ImagingMicroscope: FEI TITAN KRIOS
Electron gunElectron Source: FIELD EMISSION GUN / Accelerating Voltage: 300 kV / Electron Dose: 45 e/Å2 / Illumination Mode: FLOOD BEAM
LensImaging Mode: BRIGHT FIELD
Specimen HolderModel: OTHER
CameraDetector: OTHER

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Image processing

ProcessingMethod: single particle reconstruction / Applied Symmetry: C1 (asymmetric) / Number of Projections: 85675
3D reconstructionSoftware: cryoSPARC / Resolution: 3.21 Å / Resolution Method: FSC 0.143 CUT-OFF / Details: Non-uniform refinement
FSC plot (resolution estimation)

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Atomic model buiding

Output model

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