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Replication dynamics of recombination-dependent replication forks

Author

Listed:
  • Karel Naiman

    (University of Sussex)

  • Eduard Campillo-Funollet

    (University of Sussex)

  • Adam T. Watson

    (University of Sussex)

  • Alice Budden

    (University of Sussex)

  • Izumi Miyabe

    (University of Sussex)

  • Antony M. Carr

    (University of Sussex)

Abstract

Replication forks restarted by homologous recombination are error prone and replicate both strands semi-conservatively using Pol δ. Here, we use polymerase usage sequencing to visualize in vivo replication dynamics of HR-restarted forks at an S. pombe replication barrier, RTS1, and model replication by Monte Carlo simulation. We show that HR-restarted forks synthesise both strands with Pol δ for up to 30 kb without maturing to a δ/ε configuration and that Pol α is not used significantly on either strand, suggesting the lagging strand template remains as a gap that is filled in by Pol δ later. We further demonstrate that HR-restarted forks progress uninterrupted through a fork barrier that arrests canonical forks. Finally, by manipulating lagging strand resection during HR-restart by deleting pku70, we show that the leading strand initiates replication at the same position, signifying the stability of the 3′ single strand in the context of increased resection.

Suggested Citation

  • Karel Naiman & Eduard Campillo-Funollet & Adam T. Watson & Alice Budden & Izumi Miyabe & Antony M. Carr, 2021. "Replication dynamics of recombination-dependent replication forks," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21198-0
    DOI: 10.1038/s41467-021-21198-0
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    Cited by:

    1. Eri Koyanagi & Yoko Kakimoto & Tamiko Minamisawa & Fumiya Yoshifuji & Toyoaki Natsume & Atsushi Higashitani & Tomoo Ogi & Antony M. Carr & Masato T. Kanemaki & Yasukazu Daigaku, 2022. "Global landscape of replicative DNA polymerase usage in the human genome," Nature Communications, Nature, vol. 13(1), pages 1-18, December.
    2. Judith Oehler & Carl A. Morrow & Matthew C. Whitby, 2023. "Gene duplication and deletion caused by over-replication at a fork barrier," Nature Communications, Nature, vol. 14(1), pages 1-15, December.
    3. Anastasiya Kishkevich & Sanjeeta Tamang & Michael O. Nguyen & Judith Oehler & Elena Bulmaga & Christos Andreadis & Carl A. Morrow & Manisha Jalan & Fekret Osman & Matthew C. Whitby, 2022. "Rad52’s DNA annealing activity drives template switching associated with restarted DNA replication," Nature Communications, Nature, vol. 13(1), pages 1-13, December.

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