Turnover of Transcription Factor Binding Sites in Drosophila
Author Information
Author(s): Moses Alan M, Pollard Daniel A, Nix David A, Iyer Venky N, Li Xiao-Yong, Biggin Mark D, Eisen Michael B
Primary Institution: University of California Berkeley
Hypothesis
The gain and loss of functional transcription factor binding sites is a major source of evolutionary change in cis-regulatory DNA and gene expression.
Conclusion
More than 5% of functional Zeste binding sites in Drosophila melanogaster were gained or lost along its lineage or the lineages of related species.
Supporting Evidence
- The study developed an evolutionary model to assess binding-site turnover.
- It was found that Zeste-bound regions have a reduced rate of binding-site loss.
- The analysis showed that binding-site gains and losses are asymmetrically distributed with respect to D. melanogaster.
Takeaway
This study looks at how certain DNA switches that control gene activity change over time in fruit flies, showing that many of these switches can be created or lost through mutations.
Methodology
The study used evolutionary models and genome-wide ChIP-chip binding data to analyze binding-site turnover in Drosophila.
Potential Biases
Potential misalignment in sequence data could lead to incorrect classifications of binding sites.
Limitations
The study assumes that all predicted binding sites are functional, which may not be the case.
Participant Demographics
The study focused on four species of Drosophila: D. melanogaster, D. simulans, D. erecta, and D. yakuba.
Statistical Information
P-Value
0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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