Regulatory Circuit of Human MicroRNA Biogenesis
Author Information
Author(s): Lee Ji, Li Zhihua, Brower-Sinning Rachel, John Bino
Primary Institution: Department of Computational Biology, University of Pittsburgh School of Medicine
Hypothesis
Transcription factors (TFs) such as c-Myb, NF-Y, Sp-1, MTF-1, and AP-2α are master-regulators of miRNA expression.
Conclusion
The study identifies numerous regulatory elements upstream of miRNA genes that are essential for their transcriptional and posttranscriptional regulation.
Supporting Evidence
- 99% of the top-predicted motifs occur within the first 500 nucleotides upstream of protein-coding genes.
- Predicted motifs are significantly enriched in G and C nucleotides.
- 22 hexamer motifs were evolutionarily conserved across human, mouse, and opossum.
Takeaway
This study found that tiny RNA molecules called microRNAs are controlled by specific DNA sequences, which can help us understand how they might be involved in diseases like cancer.
Methodology
The K-Factor computational method was used to identify regulatory motifs in the upstream sequences of human miRNAs.
Potential Biases
Potential bias due to the reliance on specific computational methods and the selection of control sequences.
Limitations
The predictions may not represent all possible motifs that regulate miRNA expression and some upstream sequences may not be representative of their promoter regions.
Statistical Information
P-Value
1.2 × 10−59
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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