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- PDB-6zwv: Cryo-EM structure of SARS-CoV-2 Spike Proteins on intact virions:... -

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Basic information

Entry
Database: PDB / ID: 6zwv
TitleCryo-EM structure of SARS-CoV-2 Spike Proteins on intact virions: 3 Closed RBDs
ComponentsSpike glycoproteinSpike protein
KeywordsVIRAL PROTEIN / SARS-CoV-2 / Spike Protein / Virions / Glycoprotein
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
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsKe, Z. / Qu, K. / Nakane, T. / Xiong, X. / Cortese, M. / Zila, V. / Scheres, S.H.W. / Briggs, J.A.G.
Funding supportEuropean Union, United Kingdom, Germany, Japan, 5items
OrganizationGrant numberCountry
European Research Council (ERC)ERC-CoG-648432European Union
Medical Research Council (MRC, United Kingdom)MC_UP_1201/16 United Kingdom
Medical Research Council (MRC, United Kingdom)MC_UP_A025_1013 United Kingdom
German Research Foundation (DFG)240245660-SFB 1129 Germany
Japan Society for the Promotion of Science (JSPS) Japan
CitationJournal: Nature / Year: 2020
Title: Structures and distributions of SARS-CoV-2 spike proteins on intact virions.
Authors: Zunlong Ke / Joaquin Oton / Kun Qu / Mirko Cortese / Vojtech Zila / Lesley McKeane / Takanori Nakane / Jasenko Zivanov / Christopher J Neufeldt / Berati Cerikan / John M Lu / Julia Peukes / ...Authors: Zunlong Ke / Joaquin Oton / Kun Qu / Mirko Cortese / Vojtech Zila / Lesley McKeane / Takanori Nakane / Jasenko Zivanov / Christopher J Neufeldt / Berati Cerikan / John M Lu / Julia Peukes / Xiaoli Xiong / Hans-Georg Kräusslich / Sjors H W Scheres / Ralf Bartenschlager / John A G Briggs /
Abstract: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virions are surrounded by a lipid bilayer from which spike (S) protein trimers protrude. Heavily glycosylated S trimers bind to the ...Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virions are surrounded by a lipid bilayer from which spike (S) protein trimers protrude. Heavily glycosylated S trimers bind to the angiotensin-converting enzyme 2 receptor and mediate entry of virions into target cells. S exhibits extensive conformational flexibility: it modulates exposure of its receptor-binding site and subsequently undergoes complete structural rearrangement to drive fusion of viral and cellular membranes. The structures and conformations of soluble, overexpressed, purified S proteins have been studied in detail using cryo-electron microscopy, but the structure and distribution of S on the virion surface remain unknown. Here we applied cryo-electron microscopy and tomography to image intact SARS-CoV-2 virions and determine the high-resolution structure, conformational flexibility and distribution of S trimers in situ on the virion surface. These results reveal the conformations of S on the virion, and provide a basis from which to understand interactions between S and neutralizing antibodies during infection or vaccination.
History
DepositionJul 28, 2020Deposition site: PDBE / Processing site: PDBE
Revision 1.0Aug 5, 2020Provider: repository / Type: Initial release
Revision 1.1Aug 26, 2020Group: Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.year
Revision 1.2Sep 2, 2020Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title ..._citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.3Dec 30, 2020Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last

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Structure visualization

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Assembly

Deposited unit
A: Spike glycoprotein
B: Spike glycoprotein
C: Spike glycoprotein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)437,38451
Polymers423,7183
Non-polymers13,66648
Water0
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area45500 Å2
ΔGint27 kcal/mol
Surface area130390 Å2
MethodPISA

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Components

#1: Protein Spike glycoprotein / Spike protein / S glycoprotein / E2 / Peplomer protein


Mass: 141239.391 Da / Num. of mol.: 3 / Source method: isolated from a natural source
Source: (natural) Severe acute respiratory syndrome coronavirus 2
References: UniProt: P0DTC2
#2: 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.: 15
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam 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
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#3: 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 / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 33
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
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
Has ligand of interestN

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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: Severe acute respiratory syndrome coronavirus 2 / Type: VIRUS
Details: sucrose-cushion purified SARS-CoV-2 virions produced from infected VeroE6 cells.
Entity ID: #1 / Source: NATURAL
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2 / Strain: Germany/BavPat1/2020
Details of virusEmpty: NO / Enveloped: YES / Isolate: STRAIN / Type: VIRION
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid type: C-flat-2/2
VitrificationInstrument: LEICA EM GP / Cryogen name: ETHANE

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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 FIELDBright-field microscopy / Nominal magnification: 81000 X / Nominal defocus max: 3000 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: ZEMLIN TABLEAU
Specimen holderCryogen: NITROGEN / Model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 2.7 sec. / Electron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 7982
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV
Image scansSampling size: 5 µm / Width: 5760 / Height: 4092 / Movie frames/image: 10 / Used frames/image: 1-10

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Processing

SoftwareName: PHENIX / Version: 1.18.2_3874: / Classification: refinement
EM software
IDNameVersionCategory
1RELION3.1particle selection
2SerialEM3.8.0image acquisition
4CTFFIND4.1.13CTF correction
7Coot0.9model fitting
9PHENIX1.18.2model refinement
10RELION3.1initial Euler assignment
11RELION3.1final Euler assignment
12RELION3.1classification
13RELION3.13D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 450473
SymmetryPoint symmetry: C3 (3 fold cyclic)
3D reconstructionResolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 29183 / Symmetry type: POINT
EM volume selectionMethod: Manual Picked / Num. of tomograms: 156 / Num. of volumes extracted: 4104 / Reference model: Reference Free
Atomic model buildingProtocol: FLEXIBLE FIT
Atomic model buildingPDB-ID: 6ZP0
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00925662
ELECTRON MICROSCOPYf_angle_d1.31434905
ELECTRON MICROSCOPYf_dihedral_angle_d15.1653837
ELECTRON MICROSCOPYf_chiral_restr0.0964140
ELECTRON MICROSCOPYf_plane_restr0.0074458

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