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- PDB-6xca: Crystal structure of an anti-SARS-CoV-2 human neutralizing antibo... -
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Open data
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Basic information
Entry | Database: PDB / ID: 6xca | ||||||
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Title | Crystal structure of an anti-SARS-CoV-2 human neutralizing antibody Fab fragment, C105 | ||||||
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![]() | IMMUNE SYSTEM / Antibody / SARS-CoV-2 / SARS2 / Coronavirus / Neutralizing | ||||||
Biological species | ![]() | ||||||
Method | ![]() ![]() ![]() ![]() | ||||||
![]() | Sharaf, N.G. / Barnes, C.O. / Bjorkman, P.J. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structures of Human Antibodies Bound to SARS-CoV-2 Spike Reveal Common Epitopes and Recurrent Features of Antibodies. Authors: Christopher O Barnes / Anthony P West / Kathryn E Huey-Tubman / Magnus A G Hoffmann / Naima G Sharaf / Pauline R Hoffman / Nicholas Koranda / Harry B Gristick / Christian Gaebler / Frauke ...Authors: Christopher O Barnes / Anthony P West / Kathryn E Huey-Tubman / Magnus A G Hoffmann / Naima G Sharaf / Pauline R Hoffman / Nicholas Koranda / Harry B Gristick / Christian Gaebler / Frauke Muecksch / Julio C Cetrulo Lorenzi / Shlomo Finkin / Thomas Hägglöf / Arlene Hurley / Katrina G Millard / Yiska Weisblum / Fabian Schmidt / Theodora Hatziioannou / Paul D Bieniasz / Marina Caskey / Davide F Robbiani / Michel C Nussenzweig / Pamela J Bjorkman / ![]() Abstract: Neutralizing antibody responses to coronaviruses mainly target the receptor-binding domain (RBD) of the trimeric spike. Here, we characterized polyclonal immunoglobulin Gs (IgGs) and Fabs from COVID- ...Neutralizing antibody responses to coronaviruses mainly target the receptor-binding domain (RBD) of the trimeric spike. Here, we characterized polyclonal immunoglobulin Gs (IgGs) and Fabs from COVID-19 convalescent individuals for recognition of coronavirus spikes. Plasma IgGs differed in their focus on RBD epitopes, recognition of alpha- and beta-coronaviruses, and contributions of avidity to increased binding/neutralization of IgGs over Fabs. Using electron microscopy, we examined specificities of polyclonal plasma Fabs, revealing recognition of both S1 and RBD epitopes on SARS-CoV-2 spike. Moreover, a 3.4 Å cryo-electron microscopy (cryo-EM) structure of a neutralizing monoclonal Fab-spike complex revealed an epitope that blocks ACE2 receptor binding. Modeling based on these structures suggested different potentials for inter-spike crosslinking by IgGs on viruses, and characterized IgGs would not be affected by identified SARS-CoV-2 spike mutations. Overall, our studies structurally define a recurrent anti-SARS-CoV-2 antibody class derived from VH3-53/VH3-66 and similarity to a SARS-CoV VH3-30 antibody, providing criteria for evaluating vaccine-elicited antibodies. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 106.9 KB | Display | ![]() |
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PDB format | ![]() | 78.2 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 430.2 KB | Display | ![]() |
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Full document | ![]() | 431.5 KB | Display | |
Data in XML | ![]() | 21.9 KB | Display | |
Data in CIF | ![]() | 33.3 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6xcmC ![]() 6xcnC ![]() 3u36S S: Starting model for refinement C: citing same article ( |
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Similar structure data |
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Assembly
Deposited unit | ![]()
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Unit cell |
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Components on special symmetry positions |
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Components
#1: Antibody | Mass: 24634.453 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() | ||||
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#2: Antibody | Mass: 22879.201 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() | ||||
#3: Chemical | #4: Water | ChemComp-HOH / | Has ligand of interest | N | |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.55 Å3/Da / Density % sol: 52 % |
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Crystal grow | Temperature: 293 K / Method: vapor diffusion, sitting drop / pH: 3.5 Details: 150 mM lithium sulfate, 100 mM citric acid, pH 3.5, 18% v/v PEG6000 |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N | ||||||||||||||||||||||||||||||
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Diffraction source | Source: ![]() ![]() ![]() | ||||||||||||||||||||||||||||||
Detector | Type: DECTRIS PILATUS 6M / Detector: PIXEL / Date: May 22, 2020 | ||||||||||||||||||||||||||||||
Radiation | Monochromator: double crystal Si(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray | ||||||||||||||||||||||||||||||
Radiation wavelength | Wavelength: 0.97946 Å / Relative weight: 1 | ||||||||||||||||||||||||||||||
Reflection | Resolution: 1.8→38.89 Å / Num. obs: 46713 / % possible obs: 100 % / Redundancy: 6.8 % / CC1/2: 0.988 / Rmerge(I) obs: 0.192 / Rpim(I) all: 0.079 / Rrim(I) all: 0.208 / Net I/σ(I): 5.7 / Num. measured all: 318966 / Scaling rejects: 901 | ||||||||||||||||||||||||||||||
Reflection shell | Diffraction-ID: 1
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-Phasing
Phasing | Method: ![]() |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: PDB entry 3U36 Resolution: 1.8→38.89 Å / SU ML: 0.19 / Cross valid method: THROUGHOUT / σ(F): 1.33 / Phase error: 22.82 / Stereochemistry target values: ML
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Solvent computation | Shrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso max: 61.69 Å2 / Biso mean: 27.1921 Å2 / Biso min: 12.09 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: final / Resolution: 1.8→38.89 Å
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LS refinement shell | Refine-ID: X-RAY DIFFRACTION / Rfactor Rfree error: 0 / Total num. of bins used: 17
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