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Related Experiment Videos

Plasmid-mediated transformation of Streptococcus mutans

H K Kuramitsu, C M Long

    Infection and Immunity
    |April 1, 1982
    PubMed
    Summary

    Streptococcus mutans GS-5 cells were genetically modified for erythromycin resistance using the streptococcal plasmid pVA736. This study found higher transformation frequencies when using plasmids re-isolated from the modified GS-5 cells compared to the original source.

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    Area of Science:

    • Microbiology
    • Molecular Biology
    • Genetics

    Background:

    • Streptococcus mutans is a key cariogenic bacterium.
    • Genetic manipulation of S. mutans is crucial for understanding its virulence.
    • Plasmid-mediated transformation is a common method for genetic modification.

    Purpose of the Study:

    • To investigate the transformation efficiency of Streptococcus mutans GS-5 using streptococcal plasmid pVA736.
    • To compare transformation frequencies using plasmids isolated from different sources.

    Main Methods:

    • Transformation of Streptococcus mutans GS-5 with streptococcal plasmid pVA736.
    • Selection for erythromycin resistance.
    • Plasmid DNA isolation and re-transformation experiments.

    Main Results:

    • Successful transformation of S. mutans GS-5 to erythromycin resistance was achieved.
    • Transformation frequencies were significantly higher when using plasmids re-isolated from previously transformed GS-5 cells.
    • Plasmids derived from S. sanguis Challis showed lower transformation efficiency in GS-5.

    Conclusions:

    • Re-isolated plasmids from S. mutans GS-5 enhance transformation efficiency.
    • The source and preparation of plasmid DNA impact transformation success in S. mutans.
    • Optimized plasmid preparation can improve genetic manipulation of S. mutans.

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