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- EMDB-11206: Furin Cleaved Spike Protein of SARS-CoV-2 in Intermediate Conformation -

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Basic information

Entry
Database: EMDB / ID: EMD-11206
TitleFurin Cleaved Spike Protein of SARS-CoV-2 in Intermediate Conformation
Map data
SampleSARS-CoV-2 Spike Glycoprotein Ectodomain:
Spike glycoproteinPeplomer
Function / homology
Function and homology information


suppression by virus of host tetherin activity / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated virion attachment to host cell / endoplasmic reticulum-Golgi intermediate compartment / viral translation / host cell surface receptor binding / endocytosis involved in viral entry into host cell / endocytic vesicle membrane / fusion of virus membrane with host plasma membrane / viral protein processing ...suppression by virus of host tetherin activity / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated virion attachment to host cell / endoplasmic reticulum-Golgi intermediate compartment / viral translation / host cell surface receptor binding / endocytosis involved in viral entry into host cell / endocytic vesicle membrane / fusion of virus membrane with host plasma membrane / viral protein processing / suppression by virus of host type I interferon-mediated signaling pathway / fusion of virus membrane with host endosome membrane / viral envelope / viral entry into host cell / go:0009405: / endoplasmic reticulum lumen / host cell plasma membrane / virion membrane / integral component of membrane / identical protein binding
Spike receptor binding domain superfamily, coronavirus / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Spike glycoprotein S2 superfamily, coronavirus / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, betacoronavirus / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike glycoprotein S2, coronavirus / Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / in:ipr027400: / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like
Spike glycoprotein
Biological speciesSevere acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 6.8 Å
AuthorsWrobel AG / Benton DJ / Rosenthal PB / Gamblin SJ
Funding support United Kingdom, 2 items
OrganizationGrant numberCountry
The Francis Crick InstituteFC001078 United Kingdom
The Francis Crick InstituteFC001143 United Kingdom
CitationJournal: Nat Struct Mol Biol / Year: 2020
Title: SARS-CoV-2 and bat RaTG13 spike glycoprotein structures inform on virus evolution and furin-cleavage effects.
Authors: Antoni G Wrobel / Donald J Benton / Pengqi Xu / Chloë Roustan / Stephen R Martin / Peter B Rosenthal / John J Skehel / Steven J Gamblin /
Abstract: SARS-CoV-2 is thought to have emerged from bats, possibly via a secondary host. Here, we investigate the relationship of spike (S) glycoprotein from SARS-CoV-2 with the S protein of a closely related ...SARS-CoV-2 is thought to have emerged from bats, possibly via a secondary host. Here, we investigate the relationship of spike (S) glycoprotein from SARS-CoV-2 with the S protein of a closely related bat virus, RaTG13. We determined cryo-EM structures for RaTG13 S and for both furin-cleaved and uncleaved SARS-CoV-2 S; we compared these with recently reported structures for uncleaved SARS-CoV-2 S. We also biochemically characterized their relative stabilities and affinities for the SARS-CoV-2 receptor ACE2. Although the overall structures of human and bat virus S proteins are similar, there are key differences in their properties, including a more stable precleavage form of human S and about 1,000-fold tighter binding of SARS-CoV-2 to human receptor. These observations suggest that cleavage at the furin-cleavage site decreases the overall stability of SARS-CoV-2 S and facilitates the adoption of the open conformation that is required for S to bind to the ACE2 receptor.
Validation ReportSummary, Full report, XML, About validation report
History
DepositionJun 18, 2020-
Header (metadata) releaseJul 1, 2020-
Map releaseJul 1, 2020-
UpdateMar 17, 2021-
Current statusMar 17, 2021Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.007
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.007
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6zgh
  • Surface level: 0.01
  • 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_11206.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.)
1.08 Å/pix.
x 400 pix.
= 431.2 Å
1.08 Å/pix.
x 400 pix.
= 431.2 Å
1.08 Å/pix.
x 400 pix.
= 431.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.078 Å
Density
Contour LevelBy AUTHOR: 0.007 / Movie #1: 0.007
Minimum - Maximum-0.006791414 - 0.023896992
Average (Standard dev.)8.934323e-05 (±0.0008785079)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 431.19998 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0781.0781.078
M x/y/z400400400
origin x/y/z0.0000.0000.000
length x/y/z431.200431.200431.200
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS400400400
D min/max/mean-0.0070.0240.000

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Supplemental data

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Segmentation: #1

Fileemd_11206_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: #2

Fileemd_11206_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: #1

Fileemd_11206_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Sample components

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Entire SARS-CoV-2 Spike Glycoprotein Ectodomain

EntireName: SARS-CoV-2 Spike Glycoprotein Ectodomain / Number of components: 2

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Component #1: protein, SARS-CoV-2 Spike Glycoprotein Ectodomain

ProteinName: SARS-CoV-2 Spike Glycoprotein Ectodomain / Recombinant expression: No
MassTheoretical: 500 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 glycoproteinPeplomer / Number of Copies: 3 / Recombinant expression: No
MassTheoretical: 142.410078 kDa
SourceSpecies: Severe acute respiratory syndrome coronavirus 2
Source (engineered)Expression System: Homo sapiens (human)

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Experimental details

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Sample preparation

SpecimenSpecimen state: Particle / Method: cryo EM
Sample solutionSpecimen conc.: 0.1 mg/mL / pH: 8
VitrificationInstrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Temperature: 277 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: 54.4 e/Å2 / Illumination mode: FLOOD BEAM
LensImaging mode: BRIGHT FIELD / Defocus: 1500.0 - 3000.0 nm / Energy filter: GIF Quantum LS
Specimen HolderModel: FEI TITAN KRIOS AUTOGRID HOLDER
CameraDetector: GATAN K2 QUANTUM (4k x 4k)

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Image processing

ProcessingMethod: single particle reconstruction / Applied symmetry: C1 (asymmetric) / Number of projections: 107000
3D reconstructionAlgorithm: FOURIER SPACE / Software: RELION / Resolution: 6.8 Å / Resolution method: FSC 0.143 CUT-OFF
FSC plot (resolution estimation)

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Atomic model buiding

Modeling #1Refinement space: REAL
Input PDB model: 6VXX
Chain ID: A
Output model

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