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

Lobrich, M. and Jeggo, P. A. (2005) The two edges of the ATM sword: Co-operation between repair and checkpoint functions. Radiotherapy and Oncology, 76. pp. 112-118. ISSN 0167-8140

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Abstract

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.

Item Type: Article
Additional Information: 0167-8140 Journal article
Depositing User: Gee Wheatley
Date Deposited: 19 Mar 2007
Last Modified: 30 Nov 2012 16:51
URI: http://sro.sussex.ac.uk/id/eprint/935
Google Scholar:54 Citations
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