Journal
EMBO REPORTS
Volume 9, Issue 12, Pages 1222-1229Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/embor.2008.186
Keywords
p53; cofactor; Strap; Chk2
Categories
Funding
- Medical Research Council
- Cancer Research UK
- Leukaemia Research Fund
- Association of International Cancer Research
- European Union
- MRC [G9400953, G0500905, G0501068] Funding Source: UKRI
- Medical Research Council [G0500905, G0501068, G9400953] Funding Source: researchfish
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The p53 cofactor Strap (stress responsive activator of p300) is directly targeted by the DNA damage signalling pathway where phosphorylation by ATM (ataxia telangiectasia mutated) kinase facilitates nuclear accumulation. Here, we show that Strap regulation reflects the coordinated interplay between different DNA damage-activated protein kinases, ATM and Chk2 (Checkpoint kinase 2), where phosphorylation by each kinase provides a distinct functional consequence on the activity of Strap. ATM phosphorylation prompts nuclear accumulation, which we show occurs by impeding nuclear export, whereas Chk2 phosphorylation augments protein stability once Strap has attained a nuclear location. These results highlight the various functional roles undertaken by the DNA damage signalling kinases in Strap control and, more generally, shed light on the pathways that contribute to the regulation of the p53 response.
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