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Παρασκευή 9 Ιουνίου 2017

Taming Tricky DSBs: ATM on duty

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Publication date: Available online 9 June 2017
Source:DNA Repair
Author(s): Thomas Clouaire, Aline Marnef, Gaëlle Legube
Ataxia Telangiectasia Mutated (ATM) has been known for decades as the main kinase mediating the DNA Double-Strand Break Response (DDR). Extensive studies have revealed its dual role in locally promoting detection and repair of DSBs as well as in activating global DNA damage checkpoints. However, recent studies pinpoint additional unanticipated functions for ATM in modifying both the local chromatin landscape and the global chromosome organization, more particularly at persistent breaks. Given the emergence of a novel and unexpected class of DSBs prevalently arising in transcriptionally active genes and intrinsically difficult to repair, a specific role of ATM at refractory DSBs could be an important and so far overlooked feature of Ataxia Telangiectasia (A-T) a severe disorder associated with ATM mutations.



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