How Low Oxygen Affects Retrotransposons in Fission Yeast
Author Information
Author(s): Sehgal Alfica, Lee Chih-Yung, Espenshade Peter J
Primary Institution: Johns Hopkins University School of Medicine
Hypothesis
Low oxygen activates the fission yeast Tf2 family of retrotransposons through the Sre1 transcription factor.
Conclusion
The study found that low oxygen levels induce the expression and mobilization of Tf2 retrotransposons in fission yeast via the Sre1 transcription factor.
Supporting Evidence
- Low oxygen levels increase Tf2 mRNA expression by 59-fold.
- Sre1 is required for the low oxygen induction of Tf2 retrotransposon mRNA and protein.
- Tf2 LTR functions as an oxygen-dependent promoter regulated by Sre1.
- Transposition frequency of Tf2 increases 18-fold under low oxygen conditions.
- Solo LTRs can direct oxygen-dependent transcription of adjacent genes.
Takeaway
When there's not enough oxygen, a special protein helps certain genes in yeast move around and make more copies of themselves.
Methodology
The study used gene expression analysis, northern blotting, and transposition assays to investigate the effects of low oxygen on Tf2 retrotransposons.
Limitations
The study primarily focused on one type of retrotransposon and may not represent all retrotransposons in different conditions.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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