Understanding Gene Regulation by Leu3 in Yeast
Author Information
Author(s): Tang Lin, Liu Xiao, Clarke Neil D
Primary Institution: Johns Hopkins School of Medicine
Hypothesis
How do transcription factor deletions and overexpressions affect gene expression and binding in yeast?
Conclusion
Most genes affected by Leu3 are not directly regulated by it, despite the simplicity of the regulon.
Supporting Evidence
- The study identified that only about 3% of genes affected by leu3 deletion are detectably bound by Leu3.
- High activity conditions revealed additional direct target genes that were missed in low activity conditions.
- The combination of expression analysis and ChIP data provided a compelling statistical argument for identifying direct targets.
Takeaway
Scientists studied how a protein called Leu3 controls genes in yeast, and found that many genes change their activity without being directly controlled by Leu3.
Methodology
The study used chromatin immunoprecipitation (ChIP) and expression array experiments to analyze gene regulation under different activity levels of the Leu3 transcription factor.
Limitations
The sensitivity of the ChIP assay may have led to the failure to detect some true targets.
Statistical Information
P-Value
p<1e-5
Statistical Significance
p<1e-5
Digital Object Identifier (DOI)
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