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- EMDB-28537: cryoEM structure of a broadly neutralizing anti-SARS-CoV-2 antibo... -

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Basic information

Entry
Database: EMDB / ID: EMD-28537
TitlecryoEM structure of a broadly neutralizing anti-SARS-CoV-2 antibody STI-9167
Map datadeepEMhancer sharpened focused map
Sample
  • Complex: SARS-CoV-2 spike RBD in complex with 10A3 Fab
    • Protein or peptide: Spike protein S1
    • Protein or peptide: Fab heavy chain
    • Protein or peptide: Fab light chain
Keywordsantibody / SARS-CoV-2 / IMMUNE SYSTEM
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 / host cell endoplasmic reticulum-Golgi intermediate compartment membrane ...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 / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / entry receptor-mediated virion attachment to host cell / receptor-mediated endocytosis of virus by host cell / Attachment and Entry / membrane fusion / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / host cell surface receptor binding / 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 / 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 / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, betacoronavirus / 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 ...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. / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, betacoronavirus / 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 2 (HR2) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / 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 speciesHomo sapiens (human) / Severe acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 3.16 Å
AuthorsBajic G
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI168178 United States
CitationJournal: mBio / Year: 2024
Title: An experimental pipeline to characterize the epitope of a SARS-CoV-2 neutralizing antibody.
Authors: Kristina E Atanasoff / Luca Brambilla / Daniel C Adelsberg / Shreyas Kowdle / Christian S Stevens / Stefan Slamanig / Chuan-Tien Hung / Yanwen Fu / Reyna Lim / Linh Tran / Robert Allen / ...Authors: Kristina E Atanasoff / Luca Brambilla / Daniel C Adelsberg / Shreyas Kowdle / Christian S Stevens / Stefan Slamanig / Chuan-Tien Hung / Yanwen Fu / Reyna Lim / Linh Tran / Robert Allen / Weina Sun / J Andrew Duty / Goran Bajic / Benhur Lee / Domenico Tortorella /
Abstract: The COVID-19 pandemic remains a significant public health concern for the global population; the development and characterization of therapeutics, especially ones that are broadly effective, will ...The COVID-19 pandemic remains a significant public health concern for the global population; the development and characterization of therapeutics, especially ones that are broadly effective, will continue to be essential as severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) variants emerge. Neutralizing monoclonal antibodies remain an effective therapeutic strategy to prevent virus infection and spread so long as they recognize and interact with circulating variants. The epitope and binding specificity of a neutralizing anti-SARS-CoV-2 Spike receptor-binding domain antibody clone against many SARS-CoV-2 variants of concern were characterized by generating antibody-resistant virions coupled with cryo-EM structural analysis and VSV-spike neutralization studies. This workflow can serve to predict the efficacy of antibody therapeutics against emerging variants and inform the design of therapeutics and vaccines.
History
DepositionOct 7, 2022-
Header (metadata) releaseOct 11, 2023-
Map releaseOct 11, 2023-
UpdateApr 24, 2024-
Current statusApr 24, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_28537.png

Downloads & links

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Map

FileDownload / File: emd_28537.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationdeepEMhancer sharpened focused map
Voxel sizeX=Y=Z: 0.826 Å
Density
Contour LevelBy AUTHOR: 0.1
Minimum - Maximum-0.0018640661 - 1.7459548
Average (Standard dev.)0.00010809258 (±0.007941519)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions512512512
Spacing512512512
CellA=B=C: 422.912 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: #1

Fileemd_28537_additional_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_28537_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_28537_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : SARS-CoV-2 spike RBD in complex with 10A3 Fab

EntireName: SARS-CoV-2 spike RBD in complex with 10A3 Fab
Components
  • Complex: SARS-CoV-2 spike RBD in complex with 10A3 Fab
    • Protein or peptide: Spike protein S1
    • Protein or peptide: Fab heavy chain
    • Protein or peptide: Fab light chain

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Supramolecule #1: SARS-CoV-2 spike RBD in complex with 10A3 Fab

SupramoleculeName: SARS-CoV-2 spike RBD in complex with 10A3 Fab / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Spike protein S1

MacromoleculeName: Spike protein S1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 21.776381 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: TNLCPFGEVF NATRFASVYA WNRKRISNCV ADYSVLYNSA SFSTFKCYGV SPTKLNDLCF TNVYADSFVI RGDEVRQIAP GQTGKIADY NYKLPDDFTG CVIAWNSNNL DSKVGGNYNY LYRLFRKSNL KPFERDISTE IYQAGSTPCN GVEGFNCYFP L QSYGFQPT ...String:
TNLCPFGEVF NATRFASVYA WNRKRISNCV ADYSVLYNSA SFSTFKCYGV SPTKLNDLCF TNVYADSFVI RGDEVRQIAP GQTGKIADY NYKLPDDFTG CVIAWNSNNL DSKVGGNYNY LYRLFRKSNL KPFERDISTE IYQAGSTPCN GVEGFNCYFP L QSYGFQPT NGVGYQPYRV VVLSFELLHA PATVCG

UniProtKB: Spike glycoprotein

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Macromolecule #2: Fab heavy chain

MacromoleculeName: Fab heavy chain / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.956542 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
QVQLVESGGG VVQPGRSLRL SCAASGFTFS SYGMNWVRQA PGKGLEWVAI IWYDGNNKYY VDSVKGRFTI SRDNSKNTLY LQMNSLRAE DTAVYYCARK DYSKTYYGYY FDYWGQGTLV TVSS

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Macromolecule #3: Fab light chain

MacromoleculeName: Fab light chain / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 11.6199 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
DIQMTQSPSS LSASVGDRVT ITCRASQSIH SFLNWYQQKP GKPPNLLIYA ASSLQSGLPS RFSGSGSGTD FTLTISSLQP EDFATYYCQ QSYITPPTFG HGTKVEIK

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration1 mg/mL
BufferpH: 7.5
GridModel: UltrAuFoil / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec.
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 293 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 58.92 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: OTHER / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.5 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6m0j

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.16 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 320574
Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER
FSC plot (resolution estimation)

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