Phosphorylation of Tip60 by GSK-3 determines the induction of PUMA and apoptosis by p53.
Phosphorylation of Tip60 by GSK-3 determines the induction of PUMA and apoptosis by p53.
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DOI:
10.1016/j.molcel.2011.03.033
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发表时间:
2011-06-10
期刊:
影响因子:
16
通讯作者:
Maurer U
中科院分区:
文献类型:
--
作者:
Charvet C;Wissler M;Brauns-Schubert P;Wang SJ;Tang Y;Sigloch FC;Mellert H;Brandenburg M;Lindner SE;Breit B;Green DR;McMahon SB;Borner C;Gu W;Maurer U
Activation of p53 by DNA damage results in either cell cycle arrest, allowing DNA repair and cell survival, or induction of apoptosis. As these opposite outcomes are both mediated by p53 stabilization, additional mechanisms to determine this decision must exist. Here we show that glycogen synthase kinase-3 (GSK-3) is required for the p53-mediated induction of the pro-apoptotic BH3 only-protein PUMA, an essential mediator of p53-induced apoptosis. Inhibition of GSK-3 protected from cell death induced by DNA damage and promoted increased long-term cell survival. We demonstrate that GSK-3 phosphorylates serine 86 of the p53-acetyltransferase Tip60. A Tip60S86A mutant was less active to induce p53 K120 acetylation, Histone 4 acetylation and expression of PUMA. Our data suggest that GSK-3 mediated Tip60S86-phosphorylation provides a link between PI3K signaling and the choice for or against apoptosis induction by p53.
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