Positive Selection and Transcription Factor Binding Site Turnover in Drosophila
Author Information
Author(s): He Bin Z., Holloway Alisha K., Maerkl Sebastian J., Kreitman Martin, Petrov Dmitri A.
Primary Institution: The University of Chicago
Hypothesis
Does positive selection drive transcription factor binding site turnover?
Conclusion
The study found that positive selection contributes to the gain and loss of transcription factor binding sites in Drosophila.
Supporting Evidence
- Patterns of polymorphism and divergence are not compatible with neutral evolution.
- Multiple lines of evidence suggest positive selection for both gains and losses of transcription factor binding sites.
- The study proposes a model to reconcile selection driving turnover with constrained function over time.
Takeaway
This study shows that some parts of DNA change quickly to help genes work better, and this happens because of natural selection.
Methodology
The study analyzed patterns of single nucleotide polymorphism in transcription factor binding sites of two Drosophila species.
Potential Biases
Ascertainment bias due to the identification of binding sites exclusively in one species.
Limitations
The analysis was limited to a curated set of high-confidence transcription factor binding sites.
Participant Demographics
The study involved Drosophila melanogaster and Drosophila simulans.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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