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- PDB-9fjk: Omicron BA.1 Spike protein with neutralizing NTD specific mAb K501SP6 -

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Basic information

Entry
Database: PDB / ID: 9fjk
TitleOmicron BA.1 Spike protein with neutralizing NTD specific mAb K501SP6
Components
  • K501SP6 Fv Heavy Chain
  • K501SP6 Fv Light Chain
  • Spike glycoprotein,Fibritin
KeywordsVIRAL PROTEIN / Neutralizing Antibody / Conserved Epitope / Covid-19 / Spike
Function / homology
Function and homology information


virion component / symbiont-mediated disruption of host tissue / Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / viral translation / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion ...virion component / symbiont-mediated disruption of host tissue / Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / viral translation / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / membrane fusion / Attachment and Entry / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / receptor ligand activity / endocytosis involved in viral entry into host cell / 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 / 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, 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. ...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, 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. / 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 S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / 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
Spike glycoprotein / Fibritin
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2
Enterobacteria phage T4 (virus)
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.84 Å
AuthorsBjoernsson, K.H. / Walker, M.R. / Raghavan, S.S.R. / Ward, A.B. / Barfod, L.K.
Funding support Denmark, 1items
OrganizationGrant numberCountry
Novo Nordisk Foundation Denmark
CitationJournal: Commun Biol / Year: 2024
Title: Broadly potent spike-specific human monoclonal antibodies inhibit SARS-CoV-2 Omicron sub-lineages.
Authors: Melanie R Walker / Alexander Underwood / Kasper H Björnsson / Sai Sundar Rajan Raghavan / Maria R Bassi / Alekxander Binderup / Long V Pham / Santseharay Ramirez / Mette Pinholt / Robert ...Authors: Melanie R Walker / Alexander Underwood / Kasper H Björnsson / Sai Sundar Rajan Raghavan / Maria R Bassi / Alekxander Binderup / Long V Pham / Santseharay Ramirez / Mette Pinholt / Robert Dagil / Anne S Knudsen / Manja Idorn / Max Soegaard / Kaituo Wang / Andrew B Ward / Ali Salanti / Jens Bukh / Lea Barfod /
Abstract: The continuous emergence of SARS-CoV-2 variants of concern has rendered many therapeutic monoclonal antibodies (mAbs) ineffective. To date, there are no clinically authorized therapeutic antibodies ...The continuous emergence of SARS-CoV-2 variants of concern has rendered many therapeutic monoclonal antibodies (mAbs) ineffective. To date, there are no clinically authorized therapeutic antibodies effective against the recently circulating Omicron sub-lineages BA.2.86 and JN.1. Here, we report the isolation of broad and potent neutralizing human mAbs (HuMabs) from a healthcare worker infected with SARS-CoV-2 early in the pandemic. These include a genetically unique HuMab, named K501SP6, which can neutralize different Omicron sub-lineages, including BQ.1, XBB.1, BA.2.86 and JN.1, by targeting a highly conserved epitope on the N terminal domain, as well as an RBD-specific HuMab (K501SP3) with high potency towards earlier circulating variants that was escaped by the more recent Omicron sub-lineages through spike F486 and E484 substitutions. Characterizing SARS-CoV-2 spike-specific HuMabs, including broadly reactive non-RBD-specific HuMabs, can give insight into the immune mechanisms involved in neutralization and immune evasion, which can be a valuable addition to already existing SARS-CoV-2 therapies.
History
DepositionMay 31, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0Aug 14, 2024Provider: repository / Type: Initial release
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Revision 1.1Nov 20, 2024Group: Data collection / Structure summary
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Spike glycoprotein,Fibritin
B: Spike glycoprotein,Fibritin
C: Spike glycoprotein,Fibritin
H: K501SP6 Fv Heavy Chain
L: K501SP6 Fv Light Chain


Theoretical massNumber of molelcules
Total (without water)452,8335
Polymers452,8335
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area34510 Å2
ΔGint-137 kcal/mol
Surface area142730 Å2

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Components

#1: Protein Spike glycoprotein,Fibritin / S glycoprotein / E2 / Peplomer protein / Collar protein / Whisker antigen control protein


Mass: 141481.031 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2, (gene. exp.) Enterobacteria phage T4 (virus)
Strain: BA.1 / Gene: S, 2, wac / Production host: Homo sapiens (human) / References: UniProt: P0DTC2, UniProt: P10104
#2: Antibody K501SP6 Fv Heavy Chain


Mass: 14387.906 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#3: Antibody K501SP6 Fv Light Chain


Mass: 14002.314 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
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
IDNameTypeDetailsEntity IDParent-IDSource
1AlphacoronavirusCOMPLEXOmicron BA.1 spike trimer with Fab fragment of human monoclonal antibody K501SP6 produced with hybridoma technologyall0MULTIPLE SOURCES
2AntibodyCOMPLEXHuman monoclonal antibody#2-#31RECOMBINANT
3Spike glycoprotein with fibritinCOMPLEXOmicron BA.1 spike trimer#11RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-IDStrain
22Homo sapiens (human)9606
33Severe acute respiratory syndrome coronavirus 22697049Omicron BA.1
43Enterobacteria phage T4 (virus)10665
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
22Homo sapiens (human)9606
33Homo sapiens (human)9606
Details of virusEmpty: NO / Enveloped: YES / Isolate: OTHER / Type: VIRION
Natural hostOrganism: Homo sapiens
Buffer solutionpH: 7.5 / Details: TBS, pH 7.5
SpecimenConc.: 1.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: UltrAuFoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

MicroscopyModel: TFS GLACIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 195000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 60 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARC4.4.1particle selection
4cryoSPARC4.3.1CTF correction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 591736
3D reconstructionResolution: 2.84 Å / Resolution method: FSC 0.5 CUT-OFF / Num. of particles: 87875 / Symmetry type: POINT

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