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    Encapsidation of yeast killer double-stranded ribonucleic acids: dependence of M on L

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    Authors
    Bostian, Keith A.
    Sturgeon, Joyce A.
    Tipper, Donald J.
    UMass Chan Affiliations
    Department of Microbiology and Physiological Systems
    Department of Microbiology
    Document Type
    Journal Article
    Publication Date
    1980-07-01
    Keywords
    yeast
    Saccharomyces cerevisiae
    dsRNA
    Bacteriology
    Biochemistry, Biophysics, and Structural Biology
    Physiology
    
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    Abstract
    Virus-like particles containing either L or M double-stranded ribonucleic acid (dsRNA) were isolated from a killer toxin-producing strains of Saccharomyces cerevisiae (K+ R+). At least 95% of M- and 87% of L-dsRNA were recovered in virus-like particle-containing fractions. The major capsid polypeptides (ScV-P1) of both L and M virus-like particles were shown to be identical, and 95% of the cellular ScV-P1 was found in the virus-like particle-containing fractions. Since L-dsRNA encodes ScV-P1, provision of this protein for encapsidation of M-dsRNA defines at least one functional relationship between these dsRNA genomes and associates the L-dsRNA with the killer character. If encapsidation of M-dsRNA is essential for its replication or expression, then L-dsRNA plays an essential role in maintenance or expression of the killer phenotype. The relationship between the L- and M-dsRNA genomes would be analogous to that between a helper and a defective virus. The presence of only minor quantities or uncomplexed dsRNA and ScV-P1 suggests that their production is stringently coupled.
    Source

    J Bacteriol. 1980 Jul;143(1):463-70. Link to article on publisher's site

    Permanent Link to this Item
    http://hdl.handle.net/20.500.14038/36481
    PubMed ID
    6995444
    Related Resources

    Link to Article in PubMed

    Rights
    Copyright © 1980, American Society for Microbiology. Publisher PDF posted as allowed by the publisher's copyright policy at https://journals.asm.org/content/copyright-transfer-and-supplemental-material-license-agreement-2017.
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