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- PDB-7e9t: Nanometer resolution in situ structure of SARS-CoV-2 post-fusion spike -

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Basic information

Entry
Database: PDB / ID: 7e9t
TitleNanometer resolution in situ structure of SARS-CoV-2 post-fusion spike
ComponentsSpike protein S2
KeywordsVIRUS / SARS-CoV-2 / in situ / post-fusion / spike / cryo-STA
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 / viral translation / host cell surface receptor binding ...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 / 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 / suppression by virus of host type I interferon-mediated signaling pathway / viral protein processing / 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 C-terminal (CTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / : / Spike glycoprotein, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike receptor binding domain superfamily, coronavirus / 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 C-terminal (CTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / : / Spike glycoprotein, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike receptor binding domain superfamily, coronavirus / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Spike glycoprotein S2 superfamily, coronavirus / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S2 / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein S2, coronavirus
Similarity search - Domain/homology
Biological speciesSevere acute respiratory syndrome coronavirus 2
MethodELECTRON MICROSCOPY / subtomogram averaging / cryo EM / Resolution: 10.9 Å
AuthorsZhu, Y. / Tai, L. / Zhu, G. / Yin, G. / Sun, F.
CitationJournal: Proc Natl Acad Sci U S A / Year: 2021
Title: Nanometer-resolution in situ structure of the SARS-CoV-2 postfusion spike protein.
Authors: Linhua Tai / Guoliang Zhu / Minnan Yang / Lei Cao / Xiaorui Xing / Guoliang Yin / Chun Chan / Chengfeng Qin / Zihe Rao / Xiangxi Wang / Fei Sun / Yun Zhu /
Abstract: The spike protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) mediates membrane fusion to allow entry of the viral genome into host cells. To understand its detailed entry ...The spike protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) mediates membrane fusion to allow entry of the viral genome into host cells. To understand its detailed entry mechanism and develop a specific entry inhibitor, in situ structural information on the SARS-CoV-2 spike protein in different states is urgent. Here, by using cryo-electron tomography, we observed both prefusion and postfusion spikes in β-propiolactone-inactivated SARS-CoV-2 virions and solved the in situ structure of the postfusion spike at nanometer resolution. Compared to previous reports, the six-helix bundle fusion core, the glycosylation sites, and the location of the transmembrane domain were clearly resolved. We observed oligomerization patterns of the spikes on the viral membrane, likely suggesting a mechanism of fusion pore formation.
History
DepositionMar 5, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Nov 17, 2021Provider: repository / Type: Initial release

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Assembly

Deposited unit
A: Spike protein S2
B: Spike protein S2
C: Spike protein S2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)184,56124
Polymers176,0183
Non-polymers8,54321
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Spike protein S2


Mass: 58672.516 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.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam 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
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#3: Polysaccharide
alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 9
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1a_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][a-D-Manp]{}}}LINUCSPDB-CARE
#4: 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.: 9 / Source method: obtained synthetically / 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: subtomogram averaging

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Sample preparation

ComponentName: Severe acute respiratory syndrome coronavirus 2 / Type: VIRUS / Entity ID: #1 / Source: NATURAL
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Details of virusEmpty: NO / Enveloped: YES / Isolate: OTHER / Type: VIRION
Buffer solutionpH: 7
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen 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
Image recordingElectron dose: 3 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k)

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Processing

SoftwareName: PHENIX / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C3 (3 fold cyclic)
3D reconstructionResolution: 10.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 5463 / Symmetry type: POINT
EM volume selectionNum. of tomograms: 352 / Num. of volumes extracted: 7869
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0059348
ELECTRON MICROSCOPYf_angle_d0.68212705
ELECTRON MICROSCOPYf_dihedral_angle_d14.0375547
ELECTRON MICROSCOPYf_chiral_restr0.0491605
ELECTRON MICROSCOPYf_plane_restr0.0041587

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