EMD-42981

Single-particle
3.0 Å
EMD-42981 Deposition: 30/11/2023
Map released: 19/06/2024
Last modified: 20/11/2024
Overview 3D View Sample Experiment Validation Volume Browser Additional data Links
Overview 3D View Sample Experiment Validation Volume Browser Additional data Links

EMD-42981

Prefusion-stabilized Respirovirus type 3 Fusion protein

EMD-42981

Single-particle
3.0 Å
EMD-42981 Deposition: 30/11/2023
Map released: 19/06/2024
Last modified: 20/11/2024
Overview 3D View Sample Experiment Validation Volume Browser Additional data Links
Sample Organism: Human respirovirus 3, Lama glama
Sample: Trimeric Human Respirovirus 3 Fusion Protein bound to 3 copies of nanobody 4C06
Fitted models: 8v5a (Avg. Q-score: 0.469)

Deposition Authors: Johnson NV , McLellan JS
Universal paramyxovirus vaccine design by stabilizing regions involved in structural transformation of the fusion protein.
PUBMED: 38821950
DOI: doi:10.1038/s41467-024-48059-w
ISSN: 2041-1723
Abstract:
The Paramyxoviridae family encompasses medically significant RNA viruses, including human respiroviruses 1 and 3 (RV1, RV3), and zoonotic pathogens like Nipah virus (NiV). RV3, previously known as parainfluenza type 3, for which no vaccines or antivirals have been approved, causes respiratory tract infections in vulnerable populations. The RV3 fusion (F) protein is inherently metastable and will likely require prefusion (preF) stabilization for vaccine effectiveness. Here we used structure-based design to stabilize regions involved in structural transformation to generate a preF protein vaccine antigen with high expression and stability, and which, by stabilizing the coiled-coil stem region, does not require a heterologous trimerization domain. The preF candidate induces strong neutralizing antibody responses in both female naïve and pre-exposed mice and provides protection in a cotton rat challenge model (female). Despite the evolutionary distance of paramyxovirus F proteins, their structural transformation and local regions of instability are conserved, which allows successful transfer of stabilizing substitutions to the distant preF proteins of RV1 and NiV. This work presents a successful vaccine antigen design for RV3 and provides a toolbox for future paramyxovirus vaccine design and pandemic preparedness.