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Widespread occurrence of 5-methylcytosine in human coding and non-coding RNA

Open access
Squires, Jeffrey E., Patel, Hardip R., Nousch, Marco, Sibbritt, Tennille, Humphreys, David T., Parker, Brian J., Suter, Catherine M., Preiss, Thomas·2012·Nucleic Acids Research

Abstract

The modified base 5-methylcytosine (m(5)C) is well studied in DNA, but investigations of its prevalence in cellular RNA have been largely confined to tRNA and rRNA. In animals, the two m(5)C methyltransferases NSUN2 and TRDMT1 are known to modify specific tRNAs and have roles in the control of cell growth and differentiation. To map modified cytosine sites across a human transcriptome, we coupled bisulfite conversion of cellular RNA with next-generation sequencing. We confirmed 21 of the 28 previously known m(5)C sites in human tRNAs and identified 234 novel tRNA candidate sites, mostly in anticipated structural positions. Surprisingly, we discovered 10,275 sites in mRNAs and other non-coding RNAs. We observed that distribution of modified cytosines between RNA types was not random; within mRNAs they were enriched in the untranslated regions and near Argonaute binding regions. We also identified five new sites modified by NSUN2, broadening its known substrate range to another tRNA, the RPPH1 subunit of RNase P and two mRNAs. Our data demonstrates the widespread presence of modified cytosines throughout coding and non-coding sequences in a transcriptome, suggesting a broader role of this modification in the post-transcriptional control of cellular RNA function.

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Metadata

Authors
Squires, J. E., Patel, H. R., Nousch, M., Sibbritt, T., Humphreys, D. T., Parker, B. J., Suter, C. M., & Preiss, T.
Venue
Nucleic Acids Research
Published
2012-02-16
Volume
40
Issue
11
Pages
5023-5033
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2060902122
Cited by
1,007
References
5
FWCI
13.48
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Widespread occurrence of 5-methylcytosine in human coding and non-coding RNA. https://app.cochat.ai/papers/10.1093/nar/gks144
The paper
Squires, J. E., Patel, H. R., Nousch, M., Sibbritt, T., Humphreys, D. T., Parker, B. J., Suter, C. M., & Preiss, T. (2012). Widespread occurrence of 5-methylcytosine in human coding and non-coding RNA. Nucleic Acids Research. https://doi.org/10.1093/nar/gks144

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