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Related Experiment Videos

Structure of replicating herpes simplex virus DNA.

C V Jongeneel, S L Bachenheimer

    Journal of Virology
    |August 1, 1981
    PubMed
    Summary

    Herpes simplex virus DNA replication involves intermediates lacking termini, containing multiple sequence isomers. These endless intermediates mature slowly into virion DNA, offering insights into replication models.

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    Area of Science:

    • Virology
    • Molecular Biology
    • Genetics

    Background:

    • Herpes simplex virus (HSV) replication is a complex process involving viral DNA synthesis.
    • Understanding the structure of replicating viral DNA is crucial for deciphering replication mechanisms.

    Purpose of the Study:

    • To investigate the molecular anatomy of herpes simplex virus replicative intermediates.
    • To determine the presence of sequence isomers and termini in replicating HSV DNA.
    • To elucidate the relationship between replicative intermediates and mature virion DNA.

    Main Methods:

    • Cleavage of pulse-labeled replicating HSV DNA with the restriction endonuclease BglII.
    • Analysis of DNA fragments to identify sequence isomers and termini.
    • Pulse-chase experiments to track the fate of replicative intermediates.

    Main Results:

    • Replicating HSV DNA contains at least two, and likely all four, sequence isomers.
    • No detectable termini were found in the pulse-labeled replicating intermediates.
    • Endless replicative intermediates serve as precursors to virion DNA.
    • Maturation of replicative intermediates into virion DNA is a slow process.

    Conclusions:

    • Replicating HSV DNA exists in a circular or highly branched form without free termini.
    • The findings support models of HSV DNA replication involving rolling circle or similar mechanisms.
    • The slow maturation process highlights the intricate steps in viral DNA packaging and assembly.

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