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- PDB-8dg8: Cryo-EM Structure of HPIV3 prefusion F trimer in complex with 3x1 Fab -
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Open data
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Basic information
Entry | Database: PDB / ID: 8dg8 | ||||||
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Title | Cryo-EM Structure of HPIV3 prefusion F trimer in complex with 3x1 Fab | ||||||
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![]() | IMMUNE SYSTEM / Cross-neutralizing / HPIV1 / HPIV3 / mAb | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.62 Å | ||||||
![]() | Rodarte, J.V. / Pancera, M. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Cross-protective antibodies against common endemic respiratory viruses. Authors: Madelyn Cabán / Justas V Rodarte / Madeleine Bibby / Matthew D Gray / Justin J Taylor / Marie Pancera / Jim Boonyaratanakornkit / ![]() Abstract: Respiratory syncytial virus (RSV), human metapneumovirus (HMPV), and human parainfluenza virus types one (HPIV1) and three (HPIV3) can cause severe disease and death in immunocompromised patients, ...Respiratory syncytial virus (RSV), human metapneumovirus (HMPV), and human parainfluenza virus types one (HPIV1) and three (HPIV3) can cause severe disease and death in immunocompromised patients, the elderly, and those with underlying lung disease. A protective monoclonal antibody exists for RSV, but clinical use is limited to high-risk infant populations. Hence, therapeutic options for these viruses in vulnerable patient populations are currently limited. Here, we present the discovery, in vitro characterization, and in vivo efficacy testing of two cross-neutralizing monoclonal antibodies, one targeting both HPIV3 and HPIV1 and the other targeting both RSV and HMPV. The 3 × 1 antibody is capable of targeting multiple parainfluenza viruses; the MxR antibody shares features with other previously reported monoclonal antibodies that are capable of neutralizing both RSV and HMPV. We obtained structures using cryo-electron microscopy of these antibodies in complex with their antigens at 3.62 Å resolution for 3 × 1 bound to HPIV3 and at 2.24 Å for MxR bound to RSV, providing a structural basis for in vitro binding and neutralization. Together, a cocktail of 3 × 1 and MxR could have clinical utility in providing broad protection against four of the respiratory viruses that cause significant morbidity and mortality in at-risk individuals. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 260.2 KB | Display | ![]() |
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PDB format | ![]() | 214 KB | Display | ![]() |
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-Validation report
Summary document | ![]() | 1 MB | Display | ![]() |
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Full document | ![]() | 1 MB | Display | |
Data in XML | ![]() | 61.1 KB | Display | |
Data in CIF | ![]() | 88.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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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: 54970.625 Da / Num. of mol.: 3 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Production host: ![]() #2: Antibody | | Mass: 13932.664 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #3: Antibody | | Mass: 11642.857 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #4: Sugar | ChemComp-NAG / Has ligand of interest | N | |
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-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
Component | Name: Complex of one 3x1 Fab bound to the HPIV3 preF trimer / Type: COMPLEX / Entity ID: #1-#3 / Source: MULTIPLE SOURCES |
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Molecular weight | Value: 0.339 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 7.5 |
Specimen | Conc.: 0.19 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid material: GOLD / Grid mesh size: 200 divisions/in. / Grid type: UltrAuFoil R1.2/1.3 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 295 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: 3500 nm / Nominal defocus min: 500 nm |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Details: Collected at 30 degree tilt |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||
3D reconstruction | Resolution: 3.62 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 1036244 / Symmetry type: POINT | ||||||||||||||||
Atomic model building | Space: REAL |