Leroy C, et al. (2003) (original) (raw)
Reference: Leroy C, et al. (2003)
Abstract
Saccharomyces cells suffering a DNA double-strand break (DSB) ultimately escape checkpoint-mediated G2/M arrest either by recovery once the lesion is repaired or by adaptation if the lesion proves irreparable. Cells lacking the PP2C-like phosphatases Ptc2 and Ptc3 are unable to adapt to a HO-induced DSB and are also defective in recovering from a repairable DSB. In contrast, overexpression of PTC2 rescues adaptation-defective yku80Delta and cdc5-ad mutants. These effects are not explained by alterations either in the processing of DSB ends or in DSB repair. In vivo and in vitro evidence suggests that phosphorylated forms of Ptc2 and Ptc3 specifically bind to the Rad53 FHA1 domain and inactivate Rad53-dependent pathways during adaptation and recovery by dephosphorylating Rad53.
PMID: 12667463
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Reference Type
Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, Non-P.H.S. | Research Support, U.S. Gov't, P.H.S.
Authors
Leroy C, Lee SE, Vaze MB, Ochsenbein F, Guerois R, Haber JE, Marsolier-Kergoat MC
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