1. Cell Biology
  2. Chromosomes and Gene Expression
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TRF1 averts chromatin remodelling, recombination and replication dependent-Break Induced Replication at mouse telomeres

  1. Rosa Maria Porreca
  2. Emilia Herrera-Moyano
  3. Eleni Skourti
  4. Pui Pik Law
  5. Roser Gonzalez Franco
  6. Alex Montoya
  7. Peter Faull
  8. Holger Kramer
  9. Jean-Baptiste Vannier  Is a corresponding author
  1. MRC London Institute of Medical Sciences, United Kingdom
  2. The Francis Crick Institute, United Kingdom
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Cite this article as: eLife 2020;9:e49817 doi: 10.7554/eLife.49817

Abstract

Telomeres are a significant challenge to DNA replication and are prone to replication stress and telomere fragility. The shelterin component TRF1 facilitates telomere replication but the molecular mechanism remains uncertain. By interrogating the proteomic composition of telomeres, we show that mouse telomeres lacking TRF1 undergo protein composition reorganisation associated with the recruitment of DNA damage response and chromatin remodellers. Surprisingly, mTRF1 suppresses the accumulation of promyelocytic leukemia (PML) protein, BRCA1 and the SMC5/6 complex at telomeres, which is associated with increased Homologous Recombination (HR) and TERRA transcription. We uncovered a previously unappreciated role for mTRF1 in the suppression of telomere recombination, dependent on SMC5 and also POLD3 dependent Break Induced Replication at telomeres. We propose that TRF1 facilitates S-phase telomeric DNA synthesis to prevent illegitimate mitotic DNA recombination and chromatin rearrangement.

Article and author information

Author details

  1. Rosa Maria Porreca

    Telomere Replication and Stability Group, MRC London Institute of Medical Sciences, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  2. Emilia Herrera-Moyano

    Telomere Replication and Stability Group, MRC London Institute of Medical Sciences, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  3. Eleni Skourti

    Telomere Replication and Stability Group, MRC London Institute of Medical Sciences, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  4. Pui Pik Law

    Telomere Replication and Stability Group, MRC London Institute of Medical Sciences, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0001-8924-0462
  5. Roser Gonzalez Franco

    Telomere Replication and Stability Group, MRC London Institute of Medical Sciences, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  6. Alex Montoya

    Biological Mass Spectrometry and Proteomics Facility, MRC London Institute of Medical Sciences, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  7. Peter Faull

    Proteomics Mass Spectrometry Science and Technology Platform, 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:" 0000-0001-8491-8086
  8. Holger Kramer

    Biological Mass Spectrometry and Proteomics Facility, MRC London Institute of Medical Sciences, London, United Kingdom
    Competing interests
    The authors declare that no competing interests exist.
  9. Jean-Baptiste Vannier

    Telomere Replication and Stability Group, MRC London Institute of Medical Sciences, London, United Kingdom
    For correspondence
    j.vannier@lms.mrc.ac.uk
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-4471-1854

Funding

European Commission (637798 MetDNASecStr)

  • Pui Pik Law

Medical Research Council (MRC Career Development Award)

  • Emilia Herrera-Moyano
  • Pui Pik Law
  • Roser Gonzalez Franco
  • Alex Montoya
  • Holger Kramer
  • Jean-Baptiste Vannier

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

Reviewing Editor

  1. Raymund Wellinger, Université de Sherbrooke, Canada

Publication history

  1. Received: July 1, 2019
  2. Accepted: January 11, 2020
  3. Accepted Manuscript published: January 14, 2020 (version 1)

Copyright

© 2020, Porreca 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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