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Iridescent virus type 22 DNA.

J A Hibbin, D C Kelly

    Archives of Virology
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    This study characterized double-stranded DNA from iridescent virus type 22 (IV 22). The DNA was found to be linear with a molecular weight of 130-142 x 10^6.

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    Area of Science:

    • Virology
    • Molecular Biology
    • Genetics

    Background:

    • Iridescent viruses are large DNA viruses known to infect arthropods.
    • Understanding viral DNA structure is crucial for classifying viruses and understanding their replication mechanisms.

    Purpose of the Study:

    • To characterize the double-stranded DNA of iridescent virus type 22 (IV 22).
    • To determine key physical and chemical properties of the viral DNA.

    Main Methods:

    • DNA extraction from IV 22.
    • Buoyant density analysis in Cesium Chloride (CsCl) gradients.
    • Thermal denaturation profiling to determine melting temperature (Tm).
    • Guanine-cytosine (GC) content determination.
    • Molecular weight estimation using reassociation kinetics.

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  • Contour length measurements.
  • Restriction endonuclease digestion analysis.

    • Main Results:

    • The double-stranded DNA from IV 22 exhibited a specific buoyant density and thermal denaturation profile.
    • Guanine plus cytosine (GC) content was determined.
    • Reassociation kinetics, contour length, and restriction enzyme analysis indicated linear DNA.
    • The molecular weight of the viral DNA was calculated to be between 130 and 142 x 10^6 Daltons.

    Conclusions:

    • The double-stranded DNA of iridescent virus type 22 is linear.
    • The determined molecular weight provides a key characteristic for IV 22 classification.
    • These findings contribute to the understanding of iridescent virus genome structure.