Related Experiment Videos
Regulation of the transposable element mariner
D L Hartl1, A R Lohe, E R Lozovskaya
1Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.
Genetica
|January 1, 1997
Summary
Mariner/Tcl elements regulate their own activity through transposase overproduction inhibition and antagonistic mutant proteins. These mechanisms explain how these mobile genetic elements are controlled within genomes.
Area of Science:
- Genetics
- Molecular Biology
- Evolutionary Biology
Background:
- Mariner/Tcl transposable elements are widespread in animal genomes, particularly insects.
- Their dissemination occurs via horizontal transmission and persistence through speciation.
- While transposition mechanisms are known, genome regulation of these elements remains poorly understood.
Purpose of the Study:
- To investigate the regulatory mechanisms controlling mariner/Tcl transposable element activity within genomes.
- To understand how these elements are regulated, which is crucial for their use as vectors and their role in disease.
Main Methods:
- Studies involving genetically engineered mariner elements.
- Analysis of transposase activity and interactions.
- Investigation of regulatory mechanisms like overproduction inhibition and antagonistic mutants.
Main Results:
- Overproduction inhibition: excessive wild-type transposase decreases target element excision.
- Antagonistic mutant transposase proteins inhibit wild-type transposase activity.
- Defective elements may titrate transposase, and hybrid dysgenesis can mobilize some elements.
Conclusions:
- Multiple regulatory mechanisms control mariner/Tcl transposition.
- These mechanisms, including transposase inhibition and inactivation, contribute to element stability and evolution.
- Understanding regulation is key for applications in pest control and disease vector transformation.