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- PDB-8zhk: SARS-CoV-2 spike trimer (6P) in complex with three H18 Fabs, head... -

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Basic information

Entry
Database: PDB / ID: 8zhk
TitleSARS-CoV-2 spike trimer (6P) in complex with three H18 Fabs, head-to-head aggregate (C3 symmetry)
Components
  • Heavy chain of H18 Fab
  • Light chain of H18 Fab
  • Spike glycoprotein,Fibritin,Expression Tag
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM / Spike protein / RBD / Antibody / Fab / Viral protein / VIRAL PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell ...Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated endocytosis of virus by host cell / membrane fusion / Attachment and Entry / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / identical protein binding / membrane / plasma membrane
Similarity search - Function
Fibritin C-terminal / Fibritin C-terminal region / 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, betacoronavirus / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. ...Fibritin C-terminal / Fibritin C-terminal region / 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, betacoronavirus / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / 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 superfamily, coronavirus / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2
Similarity search - Domain/homology
Fibritin / Spike glycoprotein
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2
Enterobacteria phage T6 (virus)
synthetic construct (others)
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 6.3 Å
AuthorsYan, Q. / Gao, X. / Liu, B. / Hou, R. / He, P. / Li, Z. / Chen, Q. / Wang, J. / He, J. / Chen, L. ...Yan, Q. / Gao, X. / Liu, B. / Hou, R. / He, P. / Li, Z. / Chen, Q. / Wang, J. / He, J. / Chen, L. / Zhao, J. / Xiong, X.
Funding support China, 3items
OrganizationGrant numberCountry
Other government2021A1515011289 China
Other governmentSRPG22-002 China
Other governmentEKPG21-06 China
CitationJournal: Nat Commun / Year: 2024
Title: Antibodies utilizing VL6-57 light chains target a convergent cryptic epitope on SARS-CoV-2 spike protein and potentially drive the genesis of Omicron variants.
Authors: Qihong Yan / Xijie Gao / Banghui Liu / Ruitian Hou / Ping He / Yong Ma / Yudi Zhang / Yanjun Zhang / Zimu Li / Qiuluan Chen / Jingjing Wang / Xiaohan Huang / Huan Liang / Huiran Zheng / ...Authors: Qihong Yan / Xijie Gao / Banghui Liu / Ruitian Hou / Ping He / Yong Ma / Yudi Zhang / Yanjun Zhang / Zimu Li / Qiuluan Chen / Jingjing Wang / Xiaohan Huang / Huan Liang / Huiran Zheng / Yichen Yao / Xianying Chen / Xuefeng Niu / Jun He / Ling Chen / Jincun Zhao / Xiaoli Xiong /
Abstract: Continued evolution of SARS-CoV-2 generates variants to challenge antibody immunity established by infection and vaccination. A connection between population immunity and genesis of virus variants ...Continued evolution of SARS-CoV-2 generates variants to challenge antibody immunity established by infection and vaccination. A connection between population immunity and genesis of virus variants has long been suggested but its molecular basis remains poorly understood. Here, we identify a class of SARS-CoV-2 neutralizing public antibodies defined by their shared usage of VL6-57 light chains. Although heavy chains of diverse genotypes are utilized, convergent HCDR3 rearrangements have been observed among these public antibodies to cooperate with germline VL6-57 LCDRs to target a convergent epitope defined by RBD residues S371-S373-S375. Antibody repertoire analysis identifies that this class of VL6-57 antibodies is present in SARS-CoV-2-naive individuals and is clonally expanded in most COVID-19 patients. We confirm that Omicron-specific substitutions at S371, S373 and S375 mediate escape of antibodies of the VL6-57 class. These findings support that this class of public antibodies constitutes a potential immune pressure promoting the introduction of S371L/F-S373P-S375F in Omicron variants. The results provide further molecular evidence to support that antigenic evolution of SARS-CoV-2 is driven by antibody mediated population immunity.
History
DepositionMay 11, 2024Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Aug 21, 2024Provider: repository / Type: Initial release
Revision 1.1Oct 23, 2024Group: Data collection / Database references / Structure summary
Category: citation / citation_author ...citation / citation_author / em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID / _em_admin.last_update / _pdbx_entry_details.has_protein_modification
Revision 1.2Nov 13, 2024Group: Data collection / Category: em_admin / Item: _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Spike glycoprotein,Fibritin,Expression Tag
B: Spike glycoprotein,Fibritin,Expression Tag
C: Spike glycoprotein,Fibritin,Expression Tag
D: Light chain of H18 Fab
E: Heavy chain of H18 Fab
F: Light chain of H18 Fab
J: Heavy chain of H18 Fab
K: Light chain of H18 Fab
M: Heavy chain of H18 Fab
G: Spike glycoprotein,Fibritin,Expression Tag
H: Spike glycoprotein,Fibritin,Expression Tag
I: Spike glycoprotein,Fibritin,Expression Tag
L: Light chain of H18 Fab
N: Heavy chain of H18 Fab
O: Light chain of H18 Fab
P: Heavy chain of H18 Fab
Q: Light chain of H18 Fab
R: Heavy chain of H18 Fab
hetero molecules


Theoretical massNumber of molelcules
Total (without water)1,182,129108
Polymers1,157,34418
Non-polymers24,78590
Water00
1


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

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Components

#1: Protein
Spike glycoprotein,Fibritin,Expression Tag / S glycoprotein / E2 / Peplomer protein / Phage neck whiskers protein


Mass: 141253.875 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2, (gene. exp.) Enterobacteria phage T6 (virus), (gene. exp.) synthetic construct (others)
Gene: S, 2, wac, EcT6_00157 / Cell line (production host): Expi293F / Production host: Homo sapiens (human) / References: UniProt: P0DTC2, UniProt: A0A346FJN8
#2: Antibody
Light chain of H18 Fab


Mass: 25768.520 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell line (production host): HEK293F / Production host: Homo sapiens (human)
#3: Antibody
Heavy chain of H18 Fab


Mass: 25868.264 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#4: 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.: 24
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
#5: 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.: 66 / 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
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 spike trimer (6P) in complex with three H18 Fabs, head-to-head aggregate (C3 symmetry)COMPLEX#1-#30MULTIPLE SOURCES
2SARS-CoV-2 spike trimer (6P)COMPLEX#11RECOMBINANT
3H18 FabCOMPLEX#2-#31RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Severe acute respiratory syndrome coronavirus 22697049
32Severe acute respiratory syndrome coronavirus 22697049
43Homo sapiens (human)9606
51Homo sapiens (human)9606
61Enterobacteria phage T6 (virus)10666
72Enterobacteria phage T6 (virus)10666
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Homo sapiens (human)9606
32Homo sapiens (human)9606
43Homo sapiens (human)9606
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationCryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 295 K

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal magnification: 45000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 800 nm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameCategory
1cryoSPARCparticle selection
4cryoSPARCCTF correction
10cryoSPARCinitial Euler assignment
11cryoSPARCfinal Euler assignment
12cryoSPARCclassification
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 6.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 16440 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00272926
ELECTRON MICROSCOPYf_angle_d0.58799356
ELECTRON MICROSCOPYf_dihedral_angle_d4.25310359
ELECTRON MICROSCOPYf_chiral_restr0.04811586
ELECTRON MICROSCOPYf_plane_restr0.00512698

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