La Crosse virions contain a primer-stimulated RNA polymerase and a methylated cap-dependent endonuclease

J. L. Patterson, B. Holloway, D. Kolakofsky

    Research output: Contribution to journalArticle

    77 Scopus citations


    Purified La Crosse virions in vitro were found to transcribe their negative polarity (-) RNA genomes. This polymerase activity was stimulated by oligonucleotides such as (A)(n)G, cap analogs such as m7GpppAm, and natural mRNAs such as alfalfa mosaic virus RNA 4. For (A)(n)G- and alfalfa mosaic virus RNA 4-stimulated reactions, evidence is presented that these RNAs stimulate activity by acting as primers for viral transcription. The cap analogs appear to stimulate activity via an alternative mechanism. Purified La Crosse virions were also found to contain an endonuclease which specifically cleaves alfalfa mosaic virus RNA 4 when this RNA contains a methylated cap group.

    Original languageEnglish (US)
    Pages (from-to)215-222
    Number of pages8
    JournalJournal of Virology
    Issue number1
    StatePublished - Jan 1 1984


    ASJC Scopus subject areas

    • Microbiology
    • Immunology
    • Insect Science
    • Virology

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