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Distinct 5-methylcytosine profiles in poly(A) RNA from mouse embryonic stem cells and brain
Thomas Amort1, Dietmar Rieder2, Alexandra Wille1
1Division of Molecular Biology, Biocenter, Medical University of Innsbruck, 6020, Innsbruck, Austria.
Genome Biology
|January 13, 2017
Summary
This study reveals the distribution of cytosine methylation (m5C) in mouse mRNA, highlighting differences between cell types and locations within transcripts. These findings offer insights into the epitranscriptome and m5C functions.
Area of Science:
- Molecular Biology
- Epigenetics
- RNA Biology
Background:
- Posttranscriptional modifications, including mRNA methylation (m5C), are increasingly recognized.
- The prevalence and distribution of m5C across the transcriptome remain poorly understood.
- Further research is needed to explore m5C functions and regulatory roles.
Purpose of the Study:
- To conduct an unbiased global analysis of m5C in mouse embryonic stem cells and brain.
- To investigate the transcriptome-wide distribution and patterns of m5C.
- To compare m5C profiles across different cell types and cellular compartments.
Main Methods:
- Global analysis of m5C in total and nuclear poly(A) RNA.
- Unbiased mapping of m5C sites.
- Comparative analysis of methylation patterns in different samples.
Main Results:
- m5C distribution varies significantly between mouse embryonic stem cells and brain.
- m5C sites show accumulation near start codons, depletion in coding sequences, and varied 3' UTR patterns.
- Methylation patterns distinguish transcripts modified in both cell types from those modified in only one.
Conclusions:
- This study provides the first comprehensive view of cytosine methylation in the mammalian epitranscriptome.
- The data offer a valuable resource for investigating the function and significance of m5C in mRNA.
- Understanding m5C patterns is crucial for deciphering its role in pluripotent and differentiated cells.
