Poly(ADP-ribosyl)ation affects stabilization of Che-1 protein in response to DNA damage. - Archive ouverte HAL Access content directly
Journal Articles DNA Repair Year : 2011

Poly(ADP-ribosyl)ation affects stabilization of Che-1 protein in response to DNA damage.

(1, 2) , (2) , (3) , (1, 2) , (4) , (1, 2) , (1, 2) , (1, 2) , (4) , (5) , (1, 2) , (1, 2)
1
2
3
4
5

Abstract

Poly(ADP-ribose) polymerase 1 (PARP-1) catalyzes a post-translational modification that plays a crucial role in coordinating the signalling cascade in response to stress stimuli. During the DNA damage response, phosphorylation by ataxia telangiectasia mutated (ATM) kinase and checkpoint kinase Chk2 induces the stabilization of Che-1 protein, which is critical for the maintenance of G2/M arrest. In this study we showed that poly(ADP-ribosyl)ation, beyond phosphorylation, is involved in the regulation of Che-1 stabilization following DNA damage. We demonstrated that Che-1 accumulation upon doxorubicin treatment is reduced after the inhibition of PARP activity in HCT116 cells and in PARP-1 knock-out or silenced cells. In accordance, impairment in Che-1 accumulation by PARP inhibition reduced Che-1 occupancy at p21 promoter and affected the expression of the corresponding gene. Epistasis experiments showed that the effect of poly(ADP-ribosyl)ation on Che-1 stabilization is independent from ATM kinase activity. Indeed we demonstrated that Che-1 protein co-immunoprecipitates with ADP-ribose polymers and that PARP-1 directly interacts with Che-1, promoting its modification in vitro and in vivo.
Embargoed file
Embargoed file
Ne sera jamais visible
Loading...

Dates and versions

pasteur-00976870 , version 1 (10-04-2014)

Identifiers

Cite

Maria Giulia Bacalini, Debora Di Lonardo, Angela Catizone, Fabio Ciccarone, Tiziana Bruno, et al.. Poly(ADP-ribosyl)ation affects stabilization of Che-1 protein in response to DNA damage.. DNA Repair, 2011, 10 (4), pp.380-9. ⟨10.1016/j.dnarep.2011.01.002⟩. ⟨pasteur-00976870⟩

Collections

RIIP RIIP_FCB
29 View
2 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More