PRE-FUSION RSV F ANTIGENS
First Claim
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1. A pre-fusion respiratory syncytial virus (RSV) F polypeptide comprising at least two introduced cysteine residues, wherein said cysteines are in close proximity to one another and form an intrachain disulfide bond that stabilizes the pre-fusion RSV F polypeptide.
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Abstract
The invention relates to pre-fusion RSV F protein and polypeptides that contain one or more amino acid mutations that stabilize the pre-fusion conformation or destabilize the post-fusion conformation. The invention also relates to methods for inducing an immune response to pre-fusion RSV F.
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Citations
30 Claims
- 1. A pre-fusion respiratory syncytial virus (RSV) F polypeptide comprising at least two introduced cysteine residues, wherein said cysteines are in close proximity to one another and form an intrachain disulfide bond that stabilizes the pre-fusion RSV F polypeptide.
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4. (canceled)
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5. (canceled)
- 6. A pre-fusion respiratory syncytial virus (RSV) F polypeptide comprising a post-fusion modification selected from the group consisting of deletion of the HRA helix, deletion of the HRB helix, introduction of point mutations, addition of glycosylation sites and combinations thereof, wherein said post-fusion modification destabilizes the post-fusion conformation.
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10. (canceled)
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11. (canceled)
- 13. A chimeric pre-fusion F protein comprising a stabilized F protein from a virus other than RSV that contains one or more neutralizing epitope of RSV F.
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15. (canceled)
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16. (canceled)
Specification