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Open data
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Basic information
Entry | Database: PDB / ID: 9b2w | ||||||
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Title | PIV3 HN with Fab 13 | ||||||
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![]() | VIRAL PROTEIN/Immune System / HN / hemagglutinin neuraminidase / complex / antibody complex / VIRAL PROTEIN / VIRAL PROTEIN-Immune System complex | ||||||
Function / homology | ![]() exo-alpha-sialidase activity / host cell surface receptor binding / symbiont entry into host cell / viral envelope / virion attachment to host cell / host cell plasma membrane / virion membrane / membrane Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Durie, I.A. / Mousa, J.J. | ||||||
Funding support | ![]()
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![]() | ![]() Title: The structural basis of protective and nonprotective human monoclonal antibodies targeting the parainfluenza virus type 3 hemagglutinin-neuraminidase. Authors: Rose J Miller / Ian A Durie / Aaron D Gingerich / Mohamed A Elbehairy / Abigail G Branch / Riley G Davis / Nada Abbadi / Melinda A Brindley / Jarrod J Mousa / ![]() ![]() Abstract: Parainfluenza virus 3 (PIV3) infection poses a substantial risk to vulnerable groups including infants, the elderly, and immunocompromised individuals, and lacks effective treatments or vaccines. ...Parainfluenza virus 3 (PIV3) infection poses a substantial risk to vulnerable groups including infants, the elderly, and immunocompromised individuals, and lacks effective treatments or vaccines. This study focuses on targeting the hemagglutinin-neuraminidase (HN) protein, a structural glycoprotein of PIV3 critical for viral infection and egress. With the objective of targeting these activities of HN, we identified eight neutralizing human monoclonal antibodies (mAbs) with potent effects on viral neutralization, cell-cell fusion inhibition, and complement deposition. Three epitopes on PIV3 HN were delineated and one epitope, Site 2, elicits a mAb with cross-neutralizing ability against PIV1 and PIV3. Cryo-EM revealed the cross-neutralizing mAb utilizes a long CDR3 loop to bind inside the pocket of the sialic acid binding site. Additionally, we resolved the structure of a non-protective mAb binding to Site 1 near the HN:F-interaction site. The potent Site 2-directed mAb demonstrated clinical efficacy in hamsters, reducing viral replication prophylactically and therapeutically. These findings advance our understanding of PIV3 immunity and underscore the significance of targeting HN for clinical therapeutic development against PIV3. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 345.5 KB | Display | ![]() |
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PDB format | ![]() | 276.4 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 9dzqC 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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Unit cell |
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Components
-Protein , 1 types, 2 molecules DA
#1: Protein | Mass: 51625.516 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-Antibody , 2 types, 4 molecules BECF
#2: Antibody | Mass: 23468.115 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #3: Antibody | Mass: 23900.510 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-Sugars , 5 types, 6 molecules 
#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 | ||||||
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#5: Polysaccharide | Source method: isolated from a genetically manipulated source #6: Polysaccharide | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1- ...beta-D-mannopyranose-(1-4)-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 #7: 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 #9: Sugar | ChemComp-NAG / | |
-Non-polymers , 2 types, 17 molecules 


#8: Chemical | ChemComp-SO4 / #10: Water | ChemComp-HOH / | |
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-Details
Has ligand of interest | N |
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Has protein modification | Y |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.35 Å3/Da / Density % sol: 47.58 % |
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Crystal grow | Temperature: 300 K / Method: vapor diffusion, sitting drop Details: 0.1M Ammonium sulfate, 0.1M MES pH 6.5, 15% (w/v) PEG 4000 |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: DECTRIS EIGER X 16M / Detector: PIXEL / Date: Feb 11, 2023 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1 Å / Relative weight: 1 |
Reflection | Resolution: 2.51→50 Å / Num. obs: 61212 / % possible obs: 96.95 % / Redundancy: 1.6 % / CC1/2: 0.985 / CC star: 0.996 / Net I/σ(I): 17.8 |
Reflection shell | Resolution: 2.51→2.6 Å / Num. unique obs: 5863 / CC1/2: 0.897 / Rpim(I) all: 0.897 / Rrim(I) all: 0.481 |
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Processing
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Refinement | Method to determine structure: ![]()
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Solvent computation | Shrinkage radii: 0.9 Å / VDW probe radii: 1.1 Å / Solvent model: FLAT BULK SOLVENT MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 2.51→34.76 Å
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Refine LS restraints |
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LS refinement shell |
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