Abstract

N6-methyladenosine (m6A) RNA modification impacts mRNA fate primarily via reader proteins, which dictate processes in development, stress, and disease. Yet little is known about m6A function in Saccharomyces cerevisiae, which occurs solely during early meiosis. Here we perform a multifaceted analysis of the m6A reader protein Pho92/Mrb1. Cross-linking immunoprecipitation analysis reveals that Pho92 associates with the 3’end of meiotic mRNAs in both an m6A-dependent and independent manner. Within cells, Pho92 transitions from the nucleus to the cytoplasm, and associates with translating ribosomes. In the nucleus Pho92 associates with target loci through its interaction with transcriptional elongator Paf1C. Functionally, we show that Pho92 promotes and links protein synthesis to mRNA decay. As such, the Pho92-mediated m6A-mRNA decay is contingent on active translation and the CCR4-NOT complex. We propose that the m6A reader Pho92 is loaded co-transcriptionally to facilitate protein synthesis and subsequent decay of m6A modified transcripts, and thereby promotes meiosis.

Data availability

The miCLIP, iCLIP and RNA-seq RAW and processed data are available to review GEO accession GSE193561:https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE193561

The following data sets were generated

Article and author information

Author details

  1. Radhika A Varier

    The Francis Crick Institute, London, United Kingdom
    For correspondence
    radhikaav@gmail.com
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0003-1302-3159
  2. Theodora Sideri

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-5674-0804
  3. Charlotte Capitanchik

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  4. Zornitsa Manova

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  5. Enrica Calvani Enrica.Calvani

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  6. Alice Rossi

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  7. Raghu R Edupuganti

    Department of Molecular Biology, Radboud University Nijmegen, Nijmegen, Netherlands
    Competing interests
    The authors declare that no competing interests exist.
  8. Imke Ensinck

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  9. Vincent WC Chan

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-6638-5498
  10. Harshil Patel

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  11. Joanna Kirkpatrick

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  12. Peter Faull

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  13. Ambrosius P Snijders

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  14. Michiel Vermeulen

    Department of Molecular Biology, Radboud University Nijmegen, Nijmegen, Netherlands
    Competing interests
    The authors declare that no competing interests exist.
  15. Markus Ralser

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  16. Jernej Ule

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-2452-4277
  17. Nicholas M Luscombe

    The Francis Crick Institute, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  18. Folkert Jacobus van Werven

    The Francis Crick Institute, London, United Kingdom
    For correspondence
    folkert.vanwerven@crick.ac.uk
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-6685-2084

Funding

Wellcome Trust (FC001203)

  • Radhika A Varier
  • Theodora Sideri
  • Zornitsa Manova
  • Alice Rossi
  • Imke Ensinck
  • Folkert Jacobus van Werven

Cancer Research UK (FC001203)

  • Radhika A Varier
  • Theodora Sideri
  • Zornitsa Manova
  • Alice Rossi
  • Imke Ensinck
  • Folkert Jacobus van Werven

Medical Research Council (FC001203)

  • Radhika A Varier
  • Theodora Sideri
  • Zornitsa Manova
  • Alice Rossi
  • Imke Ensinck
  • Folkert Jacobus van Werven

Wellcome Trust (FC010110)

  • Charlotte Capitanchik
  • Nicholas M Luscombe

Cancer Research UK (FC010110)

  • Charlotte Capitanchik
  • Nicholas M Luscombe

Medical Research Council (FC010110)

  • Charlotte Capitanchik
  • Nicholas M Luscombe

Medical Research Council (FC001134)

  • Enrica Calvani Enrica.Calvani
  • Markus Ralser

Cancer Research UK (FC001134)

  • Enrica Calvani Enrica.Calvani
  • Markus Ralser

Dutch Cancer Society

  • Raghu R Edupuganti
  • Michiel Vermeulen

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.

Copyright

© 2022, Varier et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

Metrics

  • 1,840
    views
  • 302
    downloads
  • 23
    citations

Views, downloads and citations are aggregated across all versions of this paper published by eLife.

Download links

A two-part list of links to download the article, or parts of the article, in various formats.

Downloads (link to download the article as PDF)

Open citations (links to open the citations from this article in various online reference manager services)

Cite this article (links to download the citations from this article in formats compatible with various reference manager tools)

  1. Radhika A Varier
  2. Theodora Sideri
  3. Charlotte Capitanchik
  4. Zornitsa Manova
  5. Enrica Calvani Enrica.Calvani
  6. Alice Rossi
  7. Raghu R Edupuganti
  8. Imke Ensinck
  9. Vincent WC Chan
  10. Harshil Patel
  11. Joanna Kirkpatrick
  12. Peter Faull
  13. Ambrosius P Snijders
  14. Michiel Vermeulen
  15. Markus Ralser
  16. Jernej Ule
  17. Nicholas M Luscombe
  18. Folkert Jacobus van Werven
(2022)
N6-methyladenosine (m6A) reader Pho92 is recruited co-transcriptionally and couples translation to mRNA decay to promote meiotic fitness in yeast
eLife 11:e84034.
https://doi.org/10.7554/eLife.84034

Share this article

https://doi.org/10.7554/eLife.84034

Further reading

    1. Biochemistry and Chemical Biology
    Jianheng Fox Liu, Ben R Hawley ... Samie R Jaffrey
    Tools and Resources

    N 6,2’-O-dimethyladenosine (m6Am) is a modified nucleotide located at the first transcribed position in mRNA and snRNA that is essential for diverse physiological processes. m6Am mapping methods assume each gene uses a single start nucleotide. However, gene transcription usually involves multiple start sites, generating numerous 5’ isoforms. Thus, gene-level annotations cannot capture the diversity of m6Am modification in the transcriptome. Here, we describe CROWN-seq, which simultaneously identifies transcription-start nucleotides and quantifies m6Am stoichiometry for each 5’ isoform that initiates with adenosine. Using CROWN-seq, we map the m6Am landscape in nine human cell lines. Our findings reveal that m6Am is nearly always a high stoichiometry modification, with only a small subset of cellular mRNAs showing lower m6Am stoichiometry. We find that m6Am is associated with increased transcript expression and provide evidence that m6Am may be linked to transcription initiation associated with specific promoter sequences and initiation mechanisms. These data suggest a potential new function for m6Am in influencing transcription.

    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease
    Eva Herdering, Tristan Reif-Trauttmansdorff ... Ruth Anne Schmitz
    Research Article

    Glutamine synthetases (GS) are central enzymes essential for the nitrogen metabolism across all domains of life. Consequently, they have been extensively studied for more than half a century. Based on the ATP-dependent ammonium assimilation generating glutamine, GS expression and activity are strictly regulated in all organisms. In the methanogenic archaeon Methanosarcina mazei, it has been shown that the metabolite 2-oxoglutarate (2-OG) directly induces the GS activity. Besides, modulation of the activity by interaction with small proteins (GlnK1 and sP26) has been reported. Here, we show that the strong activation of M. mazei GS (GlnA1) by 2-OG is based on the 2-OG dependent dodecamer assembly of GlnA1 by using mass photometry (MP) and single particle cryo-electron microscopy (cryo-EM) analysis of purified strep-tagged GlnA1. The dodecamer assembly from dimers occurred without any detectable intermediate oligomeric state and was not affected in the presence of GlnK1. The 2.39 Å cryo-EM structure of the dodecameric complex in the presence of 12.5 mM 2-OG demonstrated that 2-OG is binding between two monomers. Thereby, 2-OG appears to induce the dodecameric assembly in a cooperative way. Furthermore, the active site is primed by an allosteric interaction cascade caused by 2-OG-binding towards an adaption of an open active state conformation. In the presence of additional glutamine, strong feedback inhibition of GS activity was observed. Since glutamine dependent disassembly of the dodecamer was excluded by MP, feedback inhibition most likely relies on the binding of glutamine to the catalytic site. Based on our findings, we propose that under nitrogen limitation the induction of M. mazei GS into a catalytically active dodecamer is not affected by GlnK1 and crucially depends on the presence of 2-OG.