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Related Experiment Videos

cis-acting DNA sequence requirements for P-element transposition.

M C Mullins1, D C Rio, G M Rubin

  • 1Department of Biochemistry, University of California Berkeley 94720.

Genes & Development
|May 1, 1989
PubMed
Summary
This summary is machine-generated.

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The P transposable element in Drosophila melanogaster requires specific DNA sequences at its 3' end for transposition. These sequences, including inverted repeats, are crucial and directional, with the 5' end unable to substitute for the 3' end.

Area of Science:

  • Molecular Biology
  • Genetics
  • Developmental Biology

Background:

  • The P transposable element is a key genetic tool in Drosophila melanogaster research.
  • Efficient transposition relies on specific cis-acting DNA sequences within the P element.

Purpose of the Study:

  • To investigate the functional role and orientation dependence of cis-acting DNA sequences at the 3' end of the P transposable element.
  • To determine if target site duplication influences P element forward transposition.

Main Methods:

  • Deletion analysis of the P element's 3' end.
  • Functional assays to measure transposition efficiency.
  • Comparison of transposition with different P element constructs.

Main Results:

Related Experiment Videos

  • Cis-acting sequences at the 3' end of the P element span over 150 bp.
  • These sequences include 11- and 31-bp inverted repeats also found at the 5' end.
  • The 5' end cannot functionally replace the 3' end, and the proximal of two 3' ends is preferentially used.
  • Target site duplication does not appear to be a factor in forward transposition.

Conclusions:

  • The P element's transposition is directed by specific, orientation-dependent sequences at its 3' end.
  • The functional asymmetry of the P element ends is critical for its transposition mechanism.
  • Forward transposition is independent of target site duplication.