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Quantitative sensing and signalling of single-stranded DNA during the DNA damage response

Author

Listed:
  • Susanne C. S. Bantele

    (DNA Replication and Genome Integrity)

  • Michael Lisby

    (University of Copenhagen)

  • Boris Pfander

    (DNA Replication and Genome Integrity)

Abstract

The DNA damage checkpoint senses the presence of DNA lesions and controls the cellular response thereto. A crucial DNA damage signal is single-stranded DNA (ssDNA), which is frequently found at sites of DNA damage and recruits the sensor checkpoint kinase Mec1-Ddc2. However, how this signal – and therefore the cell's DNA damage load – is quantified, is poorly understood. Here, we use genetic manipulation of DNA end resection to induce quantitatively different ssDNA signals at a site-specific double strand break in budding yeast and identify two distinct signalling circuits within the checkpoint. The local checkpoint signalling circuit leading to γH2A phosphorylation is unresponsive to increased amounts of ssDNA, while the global checkpoint signalling circuit, which triggers Rad53 activation, integrates the ssDNA signal quantitatively. The global checkpoint signal critically depends on the 9-1-1 and its downstream acting signalling axis, suggesting that ssDNA quantification depends on at least two sensor complexes.

Suggested Citation

  • Susanne C. S. Bantele & Michael Lisby & Boris Pfander, 2019. "Quantitative sensing and signalling of single-stranded DNA during the DNA damage response," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08889-5
    DOI: 10.1038/s41467-019-08889-5
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    Cited by:

    1. Lorenzo Galanti & Martina Peritore & Robert Gnügge & Elda Cannavo & Johannes Heipke & Maria Dilia Palumbieri & Barbara Steigenberger & Lorraine S. Symington & Petr Cejka & Boris Pfander, 2024. "Dbf4-dependent kinase promotes cell cycle controlled resection of DNA double-strand breaks and repair by homologous recombination," Nature Communications, Nature, vol. 15(1), pages 1-19, December.
    2. Karl-Uwe Reusswig & Julia Bittmann & Martina Peritore & Mathilde Courtes & Benjamin Pardo & Michael Wierer & Matthias Mann & Boris Pfander, 2022. "Unscheduled DNA replication in G1 causes genome instability and damage signatures indicative of replication collisions," Nature Communications, Nature, vol. 13(1), pages 1-20, December.

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