Publications by authors named "Semi Souames"
Tirant, a LTR retrotransposon with copies scattered over the chromosome arms of Drosophila melanogaster, is in the process of being lost from the chromosome arms of most natural populations of the sister species D. simulans. In an attempt to clarify the dynamics and evolution of tirant, we have studied the regulatory and reverse transcriptase regions in copies of the nine closely related species of the D.
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- The hobo transposable element in Drosophila melanogaster causes hybrid dysgenesis and exhibits variability in its TPE repeat microsatellites, with the 5TPE variant being more common in Western European populations compared to 3TPE.
- Recent research involving 16 transgenic lines sought to understand the evolutionary dynamics of these elements over 20 generations, especially in terms of their interaction and spread within the genome.
- Findings indicated that while the 5TPE element spreads as efficiently as the 3TPE element, it is genetically less active and may play a role in regulating the activity of the 3TPE, suggesting a complexity in their invasive potential beyond mere transposition ability.
The hobo transposable element contains a polymorphic microsatellite sequence located in its coding region, the TPE repeats. Previous surveys of natural populations of Drosophila melanogaster have detected at least seven different hobo transposons. These natural populations are geographically structured with regard to TPE polymorphism, and a scenario has been proposed for the invasion process.
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