Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-38780
Eid, W; Steger, M; El-Shemerly, M; Ferretti, L P; Pena-Diaz, J; König, C J; Valtorta, E; Sartori, A A; Ferrari, S (2010). DNA end resection by CtIP and exonuclease 1 prevents genomic instability. EMBO Reports, 11(12):962-968.
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End resection of DNA-which is essential for the repair of DNA double-strand breaks (DSBs) by homologous recombination-relies first on the partnership between MRE11-RAD50-NBS1 (MRN) and CtIP, followed by a processive step involving helicases and exonucleases such as exonuclease 1 (EXO1). In this study, we show that the localization of EXO1 to DSBs depends on both CtIP and MRN. We also establish that CtIP interacts with EXO1 and restrains its exonucleolytic activity in vitro. Finally, we show that on exposure to camptothecin, depletion of EXO1 in CtIP-deficient cells increases the frequency of DNA-PK-dependent radial chromosome formation. Thus, our study identifies new functions of CtIP and EXO1 in DNA end resection and provides new information on the regulation of DSB repair pathways, which is a key factor in the maintenance of genome integrity.
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||04 Faculty of Medicine > Institute of Molecular Cancer Research|
07 Faculty of Science > Institute of Molecular Cancer Research
|DDC:||570 Life sciences; biology|
|Deposited On:||10 Jan 2011 17:48|
|Last Modified:||29 Nov 2012 17:11|
|Publisher:||Nature Publishing Group|
|Free access at:||Publisher DOI. An embargo period may apply.|
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