7KNA image
Entry Detail
PDB ID:
7KNA
EMDB ID:
Keywords:
Title:
Localized reconstruction of the H1 A/Michigan/45/2015 ectodomain displayed at the surface of I53_dn5 nanoparticle
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2020-11-04
Release Date:
2021-03-31
Method Details:
Experimental Method:
Resolution:
3.30 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Hemagglutinin,I53_dn5
Chain IDs:A, B, C
Chain Length:636
Number of Molecules:3
Biological Source:Influenza A virus, synthetic construct
Ligand Molecules
Primary Citation

Abstact

Influenza vaccines that confer broad and durable protection against diverse viral strains would have a major effect on global health, as they would lessen the need for annual vaccine reformulation and immunization1. Here we show that computationally designed, two-component nanoparticle immunogens2 induce potently neutralizing and broadly protective antibody responses against a wide variety of influenza viruses. The nanoparticle immunogens contain 20 haemagglutinin glycoprotein trimers in an ordered array, and their assembly in vitro enables the precisely controlled co-display of multiple distinct haemagglutinin proteins in defined ratios. Nanoparticle immunogens that co-display the four haemagglutinins of licensed quadrivalent influenza vaccines elicited antibody responses in several animal models against vaccine-matched strains that were equivalent to or better than commercial quadrivalent influenza vaccines, and simultaneously induced broadly protective antibody responses to heterologous viruses by targeting the subdominant yet conserved haemagglutinin stem. The combination of potent receptor-blocking and cross-reactive stem-directed antibodies induced by the nanoparticle immunogens makes them attractive candidates for a supraseasonal influenza vaccine candidate with the potential to replace conventional seasonal vaccines3.

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Primary Citation of related structures