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Related Experiment Videos

Mobile DNA elements: controlling transposition with ATP-dependent molecular switches

A E Stellwagen1, N L Craig

  • 1Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.

Trends in Biochemical Sciences
|December 30, 1998
PubMed
Summary

Mobile DNA elements like bacteriophage Mu and bacterial transposon Tn7 utilize nucleotide-binding proteins as molecular switches. These switches control DNA insertion site selection and transposition machinery assembly, similar to known switches like Ras.

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Analysis of gain-of-function mutants of an ATP-dependent regulator of Tn7 transposition.

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Area of Science:

  • Molecular biology
  • Genetics
  • Biochemistry

Background:

  • Nucleotide-binding proteins function as molecular switches controlling macromolecular machines.
  • Recent studies indicate these switches regulate mobile DNA element propagation.

Purpose of the Study:

  • To investigate the role of ATP-dependent molecular switches in the transposition of bacteriophage Mu and bacterial transposon Tn7.
  • To explore parallels between these transposition switches and other known molecular switches.

Main Methods:

  • Comparative analysis of transposition mechanisms.
  • Biochemical characterization of nucleotide-binding proteins.

Main Results:

  • Bacteriophage Mu and transposon Tn7 employ ATP-dependent molecular switches for site selection and transposition machinery assembly.

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  • Functional similarities were observed between these transposition switches and proteins like Ras and EF-Tu.

    • Conclusions:

    • ATP-dependent molecular switches are crucial regulators of mobile DNA element transposition.
    • These findings highlight conserved mechanisms in molecular switch function across different biological systems.