Novel function of the cyclin A binding site of E2F in regulating p53-induced apoptosis in response to DNA damage

被引：87

作者：

Hsieh, JK ^{[1
]}

Yap, D ^{[1
]}

O'Connor, DJ ^{[1
]}

Fogal, V ^{[1
]}

Fallis, L ^{[1
]}

Chan, F ^{[1
]}

Zhong, S ^{[1
]}

Lu, X ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Sch Med, Ludwig Inst Canc Res, London W2 1PG, England

来源：

MOLECULAR AND CELLULAR BIOLOGY | 2002年 / 22卷 / 01期

关键词：

D O I：

10.1128/MCB.22.1.78-93.2002

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We demonstrate here that the E2F1 induced by DNA damage can bind to and promote the apoptotic function of p53 via the cyclin A binding site of E2F1. This function of E2F1 does not require its DP-1 binding, DNA binding, or transcriptional activity and is independent of mdm2. All the cyclin A binding E2F family members can interact and cooperate with p53 to induce apoptosis. This suggests a novel role for E2F in regulating apoptosis in response to DNA damage. Cyclin A, but not cyclin E, prevents E2F1 from interacting and cooperating with p53 to induce apoptosis. However, in response to DNA damage, cyclin A levels decrease, with a concomitant increase in E2F1-p53 complex formation. These results suggest that the binding of E2F1 to p53 can specifically stimulate the apoptotic function of p53 in response to DNA damage.

引用

页码：78 / 93

页数：16

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