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Polypeptides of mumps virus

S C Jensik, S Silver

    Journal of Virology
    |February 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Mumps virus comprises six polypeptides, including two glycoproteins. The heavier glycoprotein (viral protein 1) possesses neuraminidase and hemagglutinating activity, identifying it as the classical V antigen.

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    Area of Science:

    • Virology
    • Molecular Biology
    • Immunology

    Background:

    • Mumps virus is a significant human pathogen.
    • Understanding the structural and functional properties of mumps virus proteins is crucial for vaccine development and antiviral strategies.

    Purpose of the Study:

    • To characterize the polypeptide composition of mumps virus.
    • To identify and isolate the viral glycoproteins responsible for specific antigenic activities.

    Main Methods:

    • Propagation and radioactive labeling of mumps virus in embryonated chicken eggs.
    • Purification of the virus using density gradient centrifugation.
    • Analysis of viral polypeptides by polyacrylamide gel electrophoresis.
    • Separation and characterization of glycoproteins using affinity chromatography.

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  • Enzymatic and antigenic activity assays.

    • Main Results:

    • Mumps virus is composed of six polypeptides (40,000–64,000 daltons).
    • Viral proteins 1 and 3 are identified as the virion glycoproteins.
    • Viral protein 1 exhibits both neuraminidase and hemagglutinating activity.
    • Viral protein 1 is shown to be the V antigen, reacting with specific antisera, while viral protein 3 does not react with anti-S antisera.

    Conclusions:

    • The heavier glycoprotein (viral protein 1) of mumps virus is identified as the V antigen.
    • This glycoprotein possesses key enzymatic activities (neuraminidase, hemagglutination) essential for viral function.
    • The findings contribute to a deeper understanding of mumps virus structure and antigenicity.