Role of Cysteine Residues in HRSV F Protein Function
Author Information
Author(s): Nicole D Day, Patrick J Branigan, Changbao Liu, Lester L Gutshall, Jianquan Luo, José A Melero, Robert T Sarisky, Alfred M Del Vecchio
Primary Institution: Centocor, Inc.
Hypothesis
What is the contribution of cysteine residues in the extracellular domain of the F protein of human respiratory syncytial virus to its function?
Conclusion
Certain cysteine residues in the HRSV F protein are critical for proper protein folding and transport to the cell surface, affecting its fusion activity.
Supporting Evidence
- Mutation of cysteine residues 37, 313, 333, 343, 358, 367, 393, 416, and 439 abolished or reduced cell surface expression.
- Mutations C382S and C422S retained similar levels of antibody binding as the wild-type F protein.
- Cell fusion activity was significantly reduced for most cysteine mutations, indicating their importance in function.
Takeaway
The study found that some parts of the virus protein are really important for it to work properly, like how a key is needed to open a door.
Methodology
Mutations were introduced to cysteine residues in the HRSV F protein, and their effects on protein expression and cell fusion were analyzed using various assays.
Limitations
The study does not provide detailed structural information for the entire HRSV F protein.
Digital Object Identifier (DOI)
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