Article
Non-redundant Functions of ATM and DNA-PKcs in Response to DNA Double-Strand Breaks
Author/s | Caron, Pierre
Choudjaye, Jonathan Clouaire, Thomas Bugler, Béatrix Daburon, Virginie Aguirrebengoa, Marion Álvarez Quilón, Alejandro Cortés Ledesma, Felipe |
Publication Date | 2015 |
Deposit Date | 2017-08-10 |
Published in |
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Abstract | DNA double-strand breaks (DSBs) elicit the so-called DNA damage response (DDR), largely relying on ataxia telangiectasia mutated (ATM) and DNA-dependent protein kinase (DNA-PKcs), two members of the PI3K-like kinase family, ... DNA double-strand breaks (DSBs) elicit the so-called DNA damage response (DDR), largely relying on ataxia telangiectasia mutated (ATM) and DNA-dependent protein kinase (DNA-PKcs), two members of the PI3K-like kinase family, whose respective functions during the sequential steps of the DDR remains controversial. Using the DIvA system (DSB inducible via AsiSI) combined with high-resolution mapping and advanced microscopy, we uncovered that both ATM and DNA-PKcs spread in cis on a confined region surrounding DSBs, independently of the pathway used for repair. However, once recruited, these kinases exhibit non-overlapping functions on end joining and γH2AX domain establishment. More specifically, we found that ATM is required to ensure the association of multiple DSBs within “repair foci.” Our results suggest that ATM acts not only on chromatin marks but also on higher-order chromatin organization to ensure repair accuracy and survival. |
Funding agencies | Gobierno de España |
Project ID. | SAF2010-21017
BES-2011-04735 |
Citation | Caron, P., Choudjaye, J., Clouaire, T., Bugler, B., Daburon, V., Aguirrebengoa, M.,...,Cortés Ledesma, F. (2015). Non-redundant Functions of ATM and DNA-PKcs in Response to DNA Double-Strand Breaks. Cell Reports, 13 (8), 1598-1609. |
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