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Related Experiment Videos

Tn7: a target site-specific transposon.

N L Craig1

  • 1Department of Microbiology and Immunology, George W. Hooper Foundation, University of California, San Francisco 94143.

Molecular Microbiology
|November 1, 1991
PubMed
Summary
This summary is machine-generated.

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The bacterial transposon Tn7 exhibits high-frequency, site-specific insertion into bacterial chromosomes, unlike most mobile DNA elements. Its complex transposition machinery involves numerous proteins and unique DNA breakage/joining reactions.

Area of Science:

  • Bacteriology
  • Molecular Biology
  • Genetics

Background:

  • Most transposable elements exhibit low-frequency transposition and lack target site specificity.
  • The bacterial transposon Tn7 is an exception, known for high-frequency insertion at a specific chromosomal site (attTn7).

Purpose of the Study:

  • To elucidate the mechanisms underlying Tn7 transposition.
  • To understand the unique features of Tn7's DNA breakage and joining reactions.

Main Methods:

  • Genetic studies of Tn7 transposition.
  • Biochemical analyses of the Tn7 recombination machinery.

Main Results:

  • Tn7 transposition involves an elaborate machinery with numerous Tn7- and host-encoded proteins.

Related Experiment Videos

  • Large cis-acting sequences at transposon termini and target sites are crucial for Tn7 insertion.
  • The DNA strand breakage and joining reactions in Tn7 translocation display unusual characteristics.

    • Conclusions:

    • Tn7 transposition is a highly regulated and specific process.
    • The unique features of Tn7's mechanism offer insights into DNA recombination and mobile genetic elements.