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Surface properties of Sendai virus envelope.

T F Abidi, P L Yeagle

    Biochimica Et Biophysica Acta
    |September 5, 1984
    PubMed
    Summary

    Sendai virus F protein organizes the viral envelope. Trypsin cleavage of F protein alters phospholipid environment and reduces hemolysis, impacting viral surface properties.

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    Area of Science:

    • Virology
    • Biophysics
    • Membrane Biology

    Background:

    • Sendai virus is an enveloped virus with surface proteins crucial for its function.
    • The F protein is a key viral surface protein involved in membrane fusion and hemolysis.
    • Understanding the F protein's role in organizing the viral envelope is essential for virology research.

    Purpose of the Study:

    • To investigate the role of Sendai virus F protein in organizing the viral envelope membrane.
    • To analyze the effects of trypsin treatment on F protein and its impact on viral surface properties.

    Main Methods:

    • SDS-gel electrophoresis to analyze protein cleavage.
    • Hemolysis assays to measure viral activity.
    • 31P nuclear magnetic resonance (NMR) spectroscopy to study phospholipid environment.

    Main Results:

    • SDS-gel electrophoresis confirmed trypsin exclusively cleaves the F protein.
    • Hemolytic activity decreased to less than 10% after trypsin treatment, indicating F protein's role in this function.
    • 31P NMR studies revealed a restricted phospholipid headgroup environment in native virus, which was relieved upon trypsin treatment.

    Conclusions:

    • Sendai virus F protein plays a significant role in organizing the viral envelope membrane.
    • F protein's organization of the envelope is linked to its function in hemolysis.
    • Trypsin-mediated cleavage of F protein alters the phospholipid environment and viral surface properties.

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