1. Biochemistry and Chemical Biology
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RNA-binding proteins distinguish between similar sequence motifs to promote targeted deadenylation by Ccr4-Not

  1. Michael W Webster
  2. James AW Stowell
  3. Lori A Passmore  Is a corresponding author
  1. MRC Laboratory of Molecular Biology, United Kingdom
Research Article
  • Cited 5
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Cite this article as: eLife 2019;8:e40670 doi: 10.7554/eLife.40670

Abstract

The Ccr4-Not complex removes mRNA poly(A) tails to regulate eukaryotic mRNA stability and translation. RNA-binding proteins contribute to specificity by interacting with both Ccr4-Not and target mRNAs, but this is not fully understood. Here, we reconstitute accelerated and selective deadenylation of RNAs containing AU-rich elements (AREs) and Pumilio-response elements (PREs). We find that the fission yeast homologues of Tristetraprolin/TTP and Pumilio/Puf (Zfs1 and Puf3) interact with Ccr4-Not via multiple regions within low-complexity sequences, suggestive of a multipartite interface that extends beyond previously defined interactions. Using a two-color assay to simultaneously monitor poly(A) tail removal from different RNAs, we demonstrate that Puf3 can distinguish between RNAs of very similar sequence. Analysis of binding kinetics reveals that this is primarily due to differences in dissociation rate constants. Consequently, motif quality is a major determinant of mRNA stability for Puf3 targets in vivo and can be used for the prediction of mRNA targets.

Article and author information

Author details

  1. Michael W Webster

    Structural Studies, MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  2. James AW Stowell

    Structural Studies, MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  3. Lori A Passmore

    Structural Studies, MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
    For correspondence
    passmore@mrc-lmb.cam.ac.uk
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0003-1815-3710

Funding

Medical Research Council (MC_U105192715)

  • Lori A Passmore

Horizon 2020 Framework Programme (725685)

  • Lori A Passmore

Seventh Framework Programme (261151)

  • Lori A Passmore

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

Reviewing Editor

  1. Rachel Green, Johns Hopkins School of Medicine, United States

Publication history

  1. Received: August 1, 2018
  2. Accepted: December 28, 2018
  3. Accepted Manuscript published: January 2, 2019 (version 1)
  4. Version of Record published: January 21, 2019 (version 2)

Copyright

© 2019, Webster 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.

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