8TP7

H2 hemagglutinin (A/Singapore/1/1957) in complex with Sa-targeting Fab 4-1-1G03


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Immune memory shapes human polyclonal antibody responses to H2N2 vaccination.

Yang, Y.R.Han, J.Perrett, H.R.Richey, S.T.Jackson, A.M.Rodriguez, A.J.Gillespie, R.A.O'Connell, S.Raab, J.E.Cominsky, L.Y.Chopde, A.Kanekiyo, M.Houser, K.V.Chen, G.L.McDermott, A.B.Andrews, S.F.Ward, A.B.

(2023) bioRxiv 

  • DOI: https://doi.org/10.1101/2023.08.23.554525
  • Primary Citation of Related Structures:  
    8TP2, 8TP3, 8TP4, 8TP5, 8TP6, 8TP7, 8TP9, 8TPA

  • PubMed Abstract: 

    Influenza A virus subtype H2N2, which caused the 1957 influenza pandemic, remains a global threat. A recent phase I clinical trial investigating a ferritin nanoparticle displaying H2 hemagglutinin in H2-naïve and H2-exposed adults. Therefore, we could perform comprehensive structural and biochemical characterization of immune memory on the breadth and diversity of the polyclonal serum antibody response elicited after H2 vaccination. We temporally map the epitopes targeted by serum antibodies after first and second vaccinations and show previous H2 exposure results in higher responses to the variable head domain of hemagglutinin while initial responses in H2-naïve participants are dominated by antibodies targeting conserved epitopes. We use cryo-EM and monoclonal B cell isolation to describe the molecular details of cross-reactive antibodies targeting conserved epitopes on the hemagglutinin head including the receptor binding site and a new site of vulnerability deemed the medial junction. Our findings accentuate the impact of pre-existing influenza exposure on serum antibody responses.


  • Organizational Affiliation

    Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, 92037, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hemagglutinin
A, B, C
562Influenza A virus (A/Singapore/1/1957(H2N2))Mutation(s): 0 
Gene Names: HA
UniProt
Find proteins for Q67333 (Influenza A virus (strain A/Singapore/1/1957 H2N2))
Explore Q67333 
Go to UniProtKB:  Q67333
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ67333
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Heavy chain of monoclonal antibody 4-1-1G03
D, E, H
126Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Light chain of monoclonal antibody 4-1-1G03F,
G,
I [auth L]
108Homo sapiensMutation(s): 0 
Entity Groups  
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  • Reference Sequence
Oligosaccharides

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Entity ID: 4
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseJ [auth I],
K [auth J],
L [auth K]
3N-Glycosylation
Glycosylation Resources
GlyTouCan:  G21290RB
GlyCosmos:  G21290RB
GlyGen:  G21290RB
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Bill & Melinda Gates FoundationUnited StatesINV-004923
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United States2 T32 AI007244-36
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United States1F31Al172358

Revision History  (Full details and data files)

  • Version 1.0: 2023-10-11
    Type: Initial release