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Polypeptide synthesis i mumps virus-infected cells
Abstract:
The synthesis of polypeptides in infected Vero cells has been studied with two tissue culture adapted strains of mumps virus. Minor differences between the strains are found in the mobilities of the virus-specific polypeptides in SDS-PAGE. Eight virus-induced polypeptides have been identified with mol. wt. of 180K, 80K, 71K, 69K, 45 K, 39K, 23K and 17K. These may correspond to the L, HN, N, Fo, P, M, C and S polypeptides identified in other paramyxoviruses. The 69K F0 glycoprotein is probably a precursor for glycopolypeptides F1 and F2 with mol. wt. 61K and 14K, respectively.
Insights
Researchers identified eight mumps virus-induced polypeptides in infected Vero cells, including a potential precursor glycoprotein (F0) for other viral proteins. These findings aid in understanding paramyxovirus protein synthesis.
Area of Science:
- Virology
- Molecular Biology
- Cell Biology
Background:
- Mumps virus, a paramyxovirus, causes significant human disease.
- Understanding viral protein synthesis is crucial for developing antiviral strategies.
- Vero cells are a common model system for studying viral replication.
Purpose of the Study:
- To characterize the polypeptides synthesized during mumps virus infection in Vero cells.
- To identify and compare virus-specific polypeptides induced by different mumps virus strains.
- To investigate potential precursor-product relationships among viral proteins.
Main Methods:
- Infection of Vero cells with two distinct mumps virus strains.
- Analysis of virus-induced polypeptides using SDS-PAGE (Sodium dodecyl sulfate-polyacrylamide gel electrophoresis).
- Determination of molecular weights (mol. wt.) for identified polypeptides.
Main Results:
- Eight distinct virus-induced polypeptides were identified with molecular weights ranging from 17K to 180K.
- Minor differences in polypeptide mobilities were observed between the two mumps virus strains.
- A 69K glycoprotein (F0) was identified, likely serving as a precursor for 61K (F1) and 14K (F2) glycopolypeptides.
Conclusions:
- The identified polypeptides likely correspond to known paramyxovirus proteins (L, HN, N, F0, P, M, C, S).
- The study provides insights into mumps virus protein synthesis and potential post-translational modifications.
- Characterization of viral polypeptides aids in understanding mumps virus structure and replication mechanisms.