National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
P01-AI138938-S1
United States
Citation
Journal: Cell Rep / Year: 2021 Title: Broad cross-reactivity across sarbecoviruses exhibited by a subset of COVID-19 donor-derived neutralizing antibodies. Authors: Claudia A Jette / Alexander A Cohen / Priyanthi N P Gnanapragasam / Frauke Muecksch / Yu E Lee / Kathryn E Huey-Tubman / Fabian Schmidt / Theodora Hatziioannou / Paul D Bieniasz / Michel C ...Authors: Claudia A Jette / Alexander A Cohen / Priyanthi N P Gnanapragasam / Frauke Muecksch / Yu E Lee / Kathryn E Huey-Tubman / Fabian Schmidt / Theodora Hatziioannou / Paul D Bieniasz / Michel C Nussenzweig / Anthony P West / Jennifer R Keeffe / Pamela J Bjorkman / Christopher O Barnes / Abstract: Many anti-severe acute respiratory syndrome coronavirus 2 (anti-SARS-CoV-2) neutralizing antibodies target the angiotensin-converting enzyme 2 (ACE2) binding site on viral spike receptor-binding ...Many anti-severe acute respiratory syndrome coronavirus 2 (anti-SARS-CoV-2) neutralizing antibodies target the angiotensin-converting enzyme 2 (ACE2) binding site on viral spike receptor-binding domains (RBDs). Potent antibodies recognize exposed variable epitopes, often rendering them ineffective against other sarbecoviruses and SARS-CoV-2 variants. Class 4 anti-RBD antibodies against a less-exposed, but more-conserved, cryptic epitope could recognize newly emergent zoonotic sarbecoviruses and variants, but they usually show only weak neutralization potencies. Here, we characterize two class 4 anti-RBD antibodies derived from coronavirus disease 2019 (COVID-19) donors that exhibit breadth and potent neutralization of zoonotic coronaviruses and SARS-CoV-2 variants. C118-RBD and C022-RBD structures reveal orientations that extend from the cryptic epitope to occlude ACE2 binding and CDRH3-RBD main-chain H-bond interactions that extend an RBD β sheet, thus reducing sensitivity to RBD side-chain changes. A C118-spike trimer structure reveals rotated RBDs that allow access to the cryptic epitope and the potential for intra-spike crosslinking to increase avidity. These studies facilitate vaccine design and illustrate potential advantages of class 4 RBD-binding antibody therapeutics.
History
Deposition
Jul 22, 2021
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Header (metadata) release
Sep 22, 2021
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Map release
Sep 22, 2021
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Update
Oct 13, 2021
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Current status
Oct 13, 2021
Processing site: RCSB / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
Entire : Ternary complex of C118 Fabs bound to the stabilized SARS-CoV-2 s...
Entire
Name: Ternary complex of C118 Fabs bound to the stabilized SARS-CoV-2 spike glycoprotein
Components
Complex: Ternary complex of C118 Fabs bound to the stabilized SARS-CoV-2 spike glycoprotein
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Supramolecule #1: Ternary complex of C118 Fabs bound to the stabilized SARS-CoV-2 s...
Supramolecule
Name: Ternary complex of C118 Fabs bound to the stabilized SARS-CoV-2 spike glycoprotein type: complex / ID: 1 / Parent: 0
Source (natural)
Organism: Homo sapiens (human)
Recombinant expression
Organism: Homo sapiens (human)
Molecular weight
Experimental: 720 KDa
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Experimental details
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Structure determination
Method
cryo EM
Processing
single particle reconstruction
Aggregation state
particle
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Sample preparation
Concentration
3.0 mg/mL
Buffer
pH: 8
Grid
Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: FEI VITROBOT MARK IV
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Electron microscopy
Microscope
FEI TALOS ARCTICA
Image recording
Film or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 2970 / Average exposure time: 3.6 sec. / Average electron dose: 60.0 e/Å2
Electron beam
Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
In the structure databanks used in Yorodumi, some data are registered as the other names, "COVID-19 virus" and "2019-nCoV". Here are the details of the virus and the list of structure data.
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