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- PDB-7upx: Three RBD-down state of SARS-CoV-2 D614G spike in complex with th... -
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Open data
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Basic information
Entry | Database: PDB / ID: 7upx | |||||||||||||||
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Title | Three RBD-down state of SARS-CoV-2 D614G spike in complex with the SP1-77 neutralizing antibody Fab fragment (local refinement of the RBD and Fab variable domains) | |||||||||||||||
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![]() | VIRAL PROTEIN | |||||||||||||||
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 / Attachment and Entry / membrane fusion / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / symbiont-mediated suppression of host innate immune response / 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 | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||||||||
![]() | Zhang, J. / Luo, S. / Kreutzberger, A. / Kirchhausen, T. / Chen, B. / Haynes, B. / Alt, F. | |||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: An antibody from single human V-rearranging mouse neutralizes all SARS-CoV-2 variants through BA.5 by inhibiting membrane fusion. Authors: Sai Luo / Jun Zhang / Alex J B Kreutzberger / Amanda Eaton / Robert J Edwards / Changbin Jing / Hai-Qiang Dai / Gregory D Sempowski / Kenneth Cronin / Robert Parks / Adam Yongxin Ye / ...Authors: Sai Luo / Jun Zhang / Alex J B Kreutzberger / Amanda Eaton / Robert J Edwards / Changbin Jing / Hai-Qiang Dai / Gregory D Sempowski / Kenneth Cronin / Robert Parks / Adam Yongxin Ye / Katayoun Mansouri / Maggie Barr / Novalia Pishesha / Aimee Chapdelaine Williams / Lucas Vieira Francisco / Anand Saminathan / Hanqin Peng / Himanshu Batra / Lorenza Bellusci / Surender Khurana / S Munir Alam / David C Montefiori / Kevin O Saunders / Ming Tian / Hidde Ploegh / Tom Kirchhausen / Bing Chen / Barton F Haynes / Frederick W Alt / ![]() Abstract: SARS-CoV-2 Omicron subvariants have generated a worldwide health crisis due to resistance to most approved SARS-CoV-2 neutralizing antibodies and evasion of vaccination-induced antibodies. To manage ...SARS-CoV-2 Omicron subvariants have generated a worldwide health crisis due to resistance to most approved SARS-CoV-2 neutralizing antibodies and evasion of vaccination-induced antibodies. To manage Omicron subvariants and prepare for new ones, additional means of isolating broad and potent humanized SARS-CoV-2 neutralizing antibodies are desirable. Here, we describe a mouse model in which the primary B cell receptor (BCR) repertoire is generated solely through V(D)J recombination of a human V1-2 heavy chain (HC) and, substantially, a human Vκ1-33 light chain (LC). Thus, primary humanized BCR repertoire diversity in these mice derives from immensely diverse HC and LC antigen-contact CDR3 sequences generated by nontemplated junctional modifications during V(D)J recombination. Immunizing this mouse model with SARS-CoV-2 (Wuhan-Hu-1) spike protein immunogens elicited several V1-2/Vκ1-33-based neutralizing antibodies that bound RBD in a different mode from each other and from those of many prior patient-derived V1-2-based neutralizing antibodies. Of these, SP1-77 potently and broadly neutralized all SARS-CoV-2 variants through BA.5. Cryo-EM studies revealed that SP1-77 bound RBD away from the receptor-binding motif via a CDR3-dominated recognition mode. Lattice light-sheet microscopy-based studies showed that SP1-77 did not block ACE2-mediated viral attachment or endocytosis but rather blocked viral-host membrane fusion. The broad and potent SP1-77 neutralization activity and nontraditional mechanism of action suggest that it might have therapeutic potential. Likewise, the SP1-77 binding epitope may inform vaccine strategies. Last, the type of humanized mouse models that we have described may contribute to identifying therapeutic antibodies against future SARS-CoV-2 variants and other pathogens. | |||||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 168.6 KB | Display | ![]() |
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PDB format | ![]() | 112.1 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 904.4 KB | Display | ![]() |
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Full document | ![]() | 908.6 KB | Display | |
Data in XML | ![]() | 25.3 KB | Display | |
Data in CIF | ![]() | 36.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 26677MC ![]() 7upwC ![]() 7upyC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
#1: Protein | Mass: 144858.031 Da / Num. of mol.: 1 / Mutation: D614G Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Gene: S, 2 / Production host: ![]() |
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#2: Antibody | Mass: 49665.703 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() Production host: ![]() |
#3: Antibody | Mass: 23294.617 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() Production host: ![]() |
#4: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source |
Has ligand of interest | Y |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
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Molecular weight | Value: 6.5 MDa / Experimental value: NO | ||||||||||||||||||||||||||||
Source (natural) |
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Source (recombinant) |
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Buffer solution | pH: 7.5 | ||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 500 nm |
Image recording | Electron dose: 54.91 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.20_4459: / Classification: refinement | ||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Particle selection | Num. of particles selected: 7657522 | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 250319 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | Protocol: AB INITIO MODEL | ||||||||||||||||||||||||
Atomic model building | PDB-ID: 7KRR Pdb chain-ID: A / Pdb chain residue range: 14-1211 | ||||||||||||||||||||||||
Refine LS restraints |
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