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- PDB-7chb: Crystal structure of the SARS-CoV-2 RBD in complex with BD-236 Fab -
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Open data
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Basic information
Entry | Database: PDB / ID: 7chb | ||||||
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Title | Crystal structure of the SARS-CoV-2 RBD in complex with BD-236 Fab | ||||||
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![]() | ANTIVIRAL PROTEIN/IMMUNE SYSTEM / SARS-Cov-2 / RBD / mAb / ANTIVIRAL PROTEIN / ANTIVIRAL PROTEIN-IMMUNE SYSTEM complex | ||||||
Function / homology | ![]() 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 / 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 | ||||||
Biological species | ![]() ![]() ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Xiao, J. / Zhu, Q. | ||||||
![]() | ![]() Title: Structurally Resolved SARS-CoV-2 Antibody Shows High Efficacy in Severely Infected Hamsters and Provides a Potent Cocktail Pairing Strategy. Authors: Shuo Du / Yunlong Cao / Qinyu Zhu / Pin Yu / Feifei Qi / Guopeng Wang / Xiaoxia Du / Linlin Bao / Wei Deng / Hua Zhu / Jiangning Liu / Jianhui Nie / Yinghui Zheng / Haoyu Liang / Ruixue Liu ...Authors: Shuo Du / Yunlong Cao / Qinyu Zhu / Pin Yu / Feifei Qi / Guopeng Wang / Xiaoxia Du / Linlin Bao / Wei Deng / Hua Zhu / Jiangning Liu / Jianhui Nie / Yinghui Zheng / Haoyu Liang / Ruixue Liu / Shuran Gong / Hua Xu / Ayijiang Yisimayi / Qi Lv / Bo Wang / Runsheng He / Yunlin Han / Wenjie Zhao / Yali Bai / Yajin Qu / Xiang Gao / Chenggong Ji / Qisheng Wang / Ning Gao / Weijin Huang / Youchun Wang / X Sunney Xie / Xiao-Dong Su / Junyu Xiao / Chuan Qin / ![]() Abstract: Understanding how potent neutralizing antibodies (NAbs) inhibit SARS-CoV-2 is critical for effective therapeutic development. We previously described BD-368-2, a SARS-CoV-2 NAb with high potency; ...Understanding how potent neutralizing antibodies (NAbs) inhibit SARS-CoV-2 is critical for effective therapeutic development. We previously described BD-368-2, a SARS-CoV-2 NAb with high potency; however, its neutralization mechanism is largely unknown. Here, we report the 3.5-Å cryo-EM structure of BD-368-2/trimeric-spike complex, revealing that BD-368-2 fully blocks ACE2 recognition by occupying all three receptor-binding domains (RBDs) simultaneously, regardless of their "up" or "down" conformations. Also, BD-368-2 treats infected adult hamsters at low dosages and at various administering windows, in contrast to placebo hamsters that manifested severe interstitial pneumonia. Moreover, BD-368-2's epitope completely avoids the common binding site of VH3-53/VH3-66 recurrent NAbs, evidenced by tripartite co-crystal structures with RBDs. Pairing BD-368-2 with a potent recurrent NAb neutralizes SARS-CoV-2 pseudovirus at pM level and rescues mutation-induced neutralization escapes. Together, our results rationalized a new RBD epitope that leads to high neutralization potency and demonstrated BD-368-2's therapeutic potential in treating COVID-19. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 138.6 KB | Display | ![]() |
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PDB format | ![]() | 103.3 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 734.3 KB | Display | ![]() |
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Full document | ![]() | 739.3 KB | Display | |
Data in XML | ![]() | 24.5 KB | Display | |
Data in CIF | ![]() | 34.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7ch4C ![]() 7ch5C ![]() 7chcC ![]() 7cheC ![]() 7chfC ![]() 7chhC ![]() 6w41S S: Starting model for refinement C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Unit cell |
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Components
#1: Antibody | Mass: 23333.113 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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#2: Antibody | Mass: 23100.668 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#3: Protein | Mass: 25122.336 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Gene: S, 2 / Production host: ![]() ![]() |
#4: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source |
#5: Water | ChemComp-HOH / |
Has ligand of interest | N |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 3.29 Å3/Da / Density % sol: 62.66 % |
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Crystal grow | Temperature: 293 K / Method: vapor diffusion, sitting drop / Details: 0.1 M Sodium Citrate, pH 5.0, 8% (w/v) PEG 8000 |
-Data collection
Diffraction | Mean temperature: 80 K / Serial crystal experiment: N |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: DECTRIS EIGER X 16M / Detector: PIXEL / Date: Apr 16, 2020 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.97918 Å / Relative weight: 1 |
Reflection | Resolution: 2.4→50 Å / Num. obs: 36363 / % possible obs: 99.62 % / Redundancy: 6.8 % / CC1/2: 0.976 / Net I/σ(I): 15.2 |
Reflection shell | Resolution: 2.4→2.44 Å / Num. unique obs: 3591 / CC1/2: 0.798 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: 6W41 Resolution: 2.4→48.14 Å / SU ML: 0.3 / Cross valid method: THROUGHOUT / σ(F): 1.38 / Phase error: 24.81 / 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: 112.67 Å2 / Biso mean: 50.713 Å2 / Biso min: 28.03 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: final / Resolution: 2.4→48.14 Å
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LS refinement shell | Refine-ID: X-RAY DIFFRACTION / Rfactor Rfree error: 0 / Total num. of bins used: 13
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