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- PDB-9kvd: Cryo-EM structure of SARS-CoV-2 prototype spike protein in comple... -

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Basic information

Entry
Database: PDB / ID: 9kvd
TitleCryo-EM structure of SARS-CoV-2 prototype spike protein in complex with triple-nAb 3G5, 4H5 and 4C11
Components
  • (The heavy chain of ...) x 3
  • (The light chain of ...) x 3
  • Spike protein S1
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM / SARS-CoV-2 / Neutralizing antibody / Cryo-EM / VIRAL PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


symbiont-mediated disruption of host tissue / Maturation of spike protein / host cell surface / Translation of Structural Proteins / Virion Assembly and Release / Lectin pathway of complement activation / host extracellular region / symbiont-mediated-mediated suppression of host tetherin activity / structural constituent of virion / Induction of Cell-Cell Fusion ...symbiont-mediated disruption of host tissue / Maturation of spike protein / host cell surface / Translation of Structural Proteins / Virion Assembly and Release / Lectin pathway of complement activation / host extracellular region / symbiont-mediated-mediated suppression of host tetherin activity / structural constituent of virion / Induction of Cell-Cell Fusion / positive regulation of viral entry into host cell / Initial triggering of complement / membrane fusion / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / Attachment and Entry / entry receptor-mediated virion attachment to host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / endocytosis involved in viral entry into host cell / receptor ligand activity / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / symbiont entry into host cell / virion attachment to host cell / host cell plasma membrane / SARS-CoV-2 activates/modulates innate and adaptive immune responses / virion membrane / membrane / identical protein binding / plasma membrane
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 / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, N-terminal domain superfamily / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Spike glycoprotein, betacoronavirus / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal ...Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, N-terminal domain superfamily / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Spike glycoprotein, betacoronavirus / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus, heptad repeat 1 / Spike glycoprotein S2, coronavirus, heptad repeat 2 / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 2 (HR2) region profile. / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2
Similarity search - Domain/homology
Biological speciesMacaca mulatta (Rhesus monkey)
Severe acute respiratory syndrome coronavirus 2
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.44 Å
AuthorsSun, H. / Jiang, Y. / Wang, S. / Zheng, Z. / Li, S. / Zheng, Q.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Proc Natl Acad Sci U S A / Year: 2025
Title: Broad neutralizing antibody response of a monomeric spike-based SARS-CoV-2 bivalent vaccine against diverse variants.
Authors: Siling Wang / Hui Sun / Yizhen Wang / Zikang Wang / Lunzhi Yuan / Huilin Guo / Jiahua Gao / Miaolin Lan / Yangtao Wu / Huixian Shang / Xiuting Chen / Zheng Chen / Jiayi Hu / Zimin Tang / ...Authors: Siling Wang / Hui Sun / Yizhen Wang / Zikang Wang / Lunzhi Yuan / Huilin Guo / Jiahua Gao / Miaolin Lan / Yangtao Wu / Huixian Shang / Xiuting Chen / Zheng Chen / Jiayi Hu / Zimin Tang / Guiping Wen / Dong Ying / Chang Liu / Yanan Jiang / Jinfu Su / Min Lin / Ting Wu / Shaowei Li / Tianying Zhang / Jun Zhang / Yi Guan / Ningshao Xia / Quan Yuan / Qingbing Zheng / Yali Zhang / Zizheng Zheng /
Abstract: severeacute respiratory syndrome coronavirus 2 (SARS-CoV-2) bivalent vaccines show potential against variants but lack a full understanding of the immunological mechanisms that drive broadly ...severeacute respiratory syndrome coronavirus 2 (SARS-CoV-2) bivalent vaccines show potential against variants but lack a full understanding of the immunological mechanisms that drive broadly neutralizing antibodies (bnAbs). This study explored the immunogenicity of a bivalent vaccine in rhesus macaques, containing spike (S) proteins from the prototype (S) and chimeric S protein (S). The vaccine induced bnAbs against multiple variants, including challenging subvariants like EG.1, BA.2.86, and JN.1. The monomeric S protein exposed less accessible regions within the receptor-binding domain (RBD) "inner face" and "NTD face" and subdomains 1, eliciting a diverse array of bnAbs against various Omicron subvariants. Notably, antibodies targeting the conserved RBD inner face, such as 4A5, showed potent neutralization across all tested variants. Structural analyses provide insights into the broad protectiveness of these vaccine-elicited nAbs. This study underscores the potential of bivalent vaccines with monomeric spike proteins to confer broad-spectrum immunity, offering a promising direction for future SARS-CoV-2 universal vaccine design.
History
DepositionDec 5, 2024Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Aug 20, 2025Provider: repository / Type: Initial release
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: The heavy chain of 4C11
B: The light chain of 4C11
D: The heavy chain of 4H5
F: The light chain of 4H5
C: Spike protein S1
E: The heavy chain of 3G5
G: The light chain of 3G5
hetero molecules


Theoretical massNumber of molelcules
Total (without water)96,8938
Polymers96,6727
Non-polymers2211
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Antibody , 6 types, 6 molecules ABDFEG

#1: Antibody The heavy chain of 4C11


Mass: 13431.928 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Macaca mulatta (Rhesus monkey) / Production host: Cricetulus griseus (Chinese hamster)
#2: Antibody The light chain of 4C11


Mass: 11567.954 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Macaca mulatta (Rhesus monkey) / Production host: Cricetulus griseus (Chinese hamster)
#3: Antibody The heavy chain of 4H5


Mass: 13104.521 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Macaca mulatta (Rhesus monkey) / Production host: Cricetulus griseus (Chinese hamster)
#4: Antibody The light chain of 4H5


Mass: 11750.836 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Macaca mulatta (Rhesus monkey) / Production host: Cricetulus griseus (Chinese hamster)
#6: Antibody The heavy chain of 3G5


Mass: 12786.210 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Macaca mulatta (Rhesus monkey) / Production host: Cricetulus griseus (Chinese hamster)
#7: Antibody The light chain of 3G5


Mass: 12257.780 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Macaca mulatta (Rhesus monkey) / Production host: Cricetulus griseus (Chinese hamster)

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Protein / Sugars , 2 types, 2 molecules C

#5: Protein Spike protein S1


Mass: 21772.391 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2
Gene: S, 2 / Production host: Homo sapiens (human) / References: UniProt: P0DTC2
#8: 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


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
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

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Details

Has ligand of interestY
Has protein modificationY

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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

Component
IDNameTypeEntity IDParent-IDSource
1SARS-CoV-2 protoype spike protein in complex with triple-nAb 3G5, 4C11 and 4H5COMPLEX#1-#70MULTIPLE SOURCES
2SARS-CoV-2 prototype spike proteinCOMPLEX#51RECOMBINANT
3The fragments of triple-nAb 3G5,4C11 and 4H5COMPLEX#1-#4, #6-#71NATURAL
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Severe acute respiratory syndrome coronavirus 22697049
23Mus musculus (house mouse)10090
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
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: Tecnai F30 / Image courtesy: FEI Company
MicroscopyModel: FEI TECNAI F30
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.44 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 63542 / Symmetry type: POINT

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