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The two edges of the ATM sword: co-operation between repair and checkpoint functions

journal contribution
posted on 2023-06-07, 13:53 authored by M. Lobrich, Penny Jeggo
ATM is a central component of a signal transduction process that responds to DNA double strand breaks (DSBs) ultimately effecting cell cycle checkpoint arrest and/or apoptosis. Recent studies have shown that ATM also regulates a mechanism of processing a subset of DNA ends that appear to be difficult to ligate, since they are rejoined with slow kinetics in control cells. In the absence of this process, which involves the nuclease, Artemis, the DSBs either remain unrejoined or potentially undergo misrejoining. Thus, ATM's checkpoint function specifically facilitates its repair function. Here, we discuss the contribution of this novel function of ATM to survival after ionising irradiation and to cancer avoidance. We suggest that ATM's strength as a damage response protein lies in the co-ordination of its repair and checkpoint functions making a razor sharp knife out of two blunter edges.

History

Publication status

  • Published

Journal

Radiotherapy and Oncology

ISSN

0167-8140

Publisher

Elsevier

Volume

76

Page range

112-118

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2007-03-19

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