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Yeast targets for mRNA methylation

Zsuzsanna Bodi1, James D Button, Donald Grierson

  • 1School of Biosciences, Plant Sciences Division, University of Nottingham, Sutton Bonington, Loughborough LE12 5RD, UK.

Nucleic Acids Research
|April 28, 2010
PubMed

Insights

N(6)-Methyladenosine (m(6)A) is a widespread mRNA modification in yeast sporulation. This study identifies m(6)A in key meiotic genes, suggesting its regulatory role in yeast development.

Area of Science:

  • Molecular Biology
  • Epigenetics
  • Yeast Genetics

Background:

  • N(6)-Methyladenosine (m(6)A) is a prevalent mRNA modification in eukaryotes.
  • m(6)A levels increase during sporulation in Saccharomyces cerevisiae.
  • The methyltransferase Ime4 is linked to meiosis initiation, but its targets and m(6)A function remain unclear.

Purpose of the Study:

  • To investigate the distribution and function of m(6)A during yeast sporulation.
  • To identify specific mRNA targets of m(6)A methylation.
  • To elucidate the role of m(6)A in regulating meiotic development.

Main Methods:

  • Quantification of m(6)A levels in sporulating yeast mRNA.
  • Development of an antibody-based method to detect m(6)A-containing transcripts.
  • Analysis of m(6)A modification in key meiotic regulator genes (IME1, IME2, IME4).

Main Results:

  • Substantial m(6)A levels were found in the GpA context in sporulating yeast mRNA.
  • Approximately 50% of transcripts may contain m(6)A during meiosis, distributed across all mRNA sizes.
  • Transcripts of IME1, IME2, and IME4 were identified as methylated, with m(6)A localized to the 3'-end of IME2.

Conclusions:

  • m(6)A is a widespread mRNA modification in yeast meiosis, not limited to specific transcripts.
  • Methylation of key meiotic genes suggests a regulatory role for m(6)A in controlling developmental pathways.
  • IME4-mediated m(6)A modification likely influences developmental decisions leading to meiosis.

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