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Related Experiment Videos

Tn10-derived transposons active in Bacillus subtilis.

M A Petit1, C Bruand, L Jannière

  • 1Laboratoire de Génétique Microbienne, Institut National de Recherche Agronomique--Domaine de Vilvert, Jouy en Josas, France.

Journal of Bacteriology
|December 1, 1990
PubMed
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Researchers developed small derivatives of the Escherichia coli transposon Tn10 for use in Bacillus subtilis. These genetic elements showed successful transposition, suggesting their utility as a tool for genetic manipulation in Gram-positive bacteria.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Genetics

Background:

  • The Escherichia coli transposon Tn10 is a well-characterized mobile genetic element.
  • Genetic tools for manipulating the genome of Bacillus subtilis are valuable for research and biotechnology.
  • Developing novel transposon systems for Gram-positive bacteria remains an area of interest.

Purpose of the Study:

  • To investigate the transposition of small derivatives of the Escherichia coli transposon Tn10 in Bacillus subtilis.
  • To assess the efficiency and insertion characteristics of Tn10 derivatives in a Gram-positive host.
  • To evaluate the potential of Tn10 derivatives as a genetic tool for Bacillus subtilis.

Main Methods:

  • Construction of small Tn10 derivatives containing IS10 ends and a chloramphenicol resistance gene.

Related Experiment Videos

  • Introduction of these derivatives into Bacillus subtilis using a thermosensitive plasmid (pE194).
  • Expression of a functional Tn10 transposase gene in Bacillus subtilis to facilitate transposition.
  • Analysis of transposition frequency and insertion site distribution via restriction analysis of chromosomal DNA.

    • Main Results:

    • Successful transposition of Tn10 derivatives in Bacillus subtilis was achieved with a frequency of 10^-6 per element per generation.
    • The transposons exhibited random insertion patterns across the Bacillus subtilis chromosome, lacking highly preferred sites.
    • Approximately 1% of transposition events resulted in auxotrophic or sporulation-deficient mutants.

    Conclusions:

    • Tn10 derivatives can transpose efficiently in Bacillus subtilis.
    • The random insertion profile of these derivatives makes them suitable for generating diverse mutants.
    • Tn10 derivatives represent a promising new genetic tool for research in Bacillus subtilis and potentially other Gram-positive microorganisms.