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Recombination-deficient Streptococcus sanguis.

L Daneo-Moore, A Volpe

    Infection and Immunity
    |May 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    A UV-sensitive Streptococcus sanguis derivative was created. This strain efficiently accepts small plasmids but shows significantly reduced transformation with chromosomal DNA.

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    Area of Science:

    • Microbiology
    • Genetics
    • Bacterial Transformation

    Background:

    • Streptococcus sanguis is a common oral bacterium.
    • Genetic manipulation of bacteria is crucial for research.
    • UV sensitivity can impact DNA repair mechanisms.

    Purpose of the Study:

    • To investigate the genetic characteristics of a UV-sensitive Streptococcus sanguis derivative.
    • To compare transformation efficiencies of plasmids versus chromosomal DNA in this derivative.

    Main Methods:

    • Generation of a UV-sensitive mutant of Streptococcus sanguis Challis.
    • Transformation assays using small streptococcal plasmids.
    • Transformation assays using chromosomal DNA.

    Main Results:

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    • The UV-sensitive derivative exhibited transformation frequencies for small plasmids comparable to the parent strain.
    • Transformation frequencies for chromosomal DNA were significantly lower in the UV-sensitive derivative compared to the parent strain.

    Conclusions:

    • UV sensitivity in Streptococcus sanguis affects chromosomal DNA transformation differently than plasmid transformation.
    • This derivative may be useful for studying DNA uptake mechanisms.