E2F1 represses beta-catenin transcription and is antagonized by both pRB and CDK8.
E2F1 represses beta-catenin transcription and is antagonized by both pRB and CDK8.
复制标题
DOI:
10.1038/nature07310
复制
发表时间:
2008-09-25
期刊:
影响因子:
64.8
通讯作者:
Dyson, Nicholas J.
中科院分区:
文献类型:
--
作者:
Morris, Erick J.;Ji, Jun-Yuan;Yang, Fajun;Di Stefano, Luisa;Herr, Anabel;Moon, Nam-Sung;Kwon, Eun-Jeong;Haigis, Kevin M.;Naar, Anders M.;Dyson, Nicholas J.
The E2F1 transcription factor can promote proliferation or apoptosis when activated, and is a key downstream target of the retinoblastoma tumor suppressor protein (pRB). Here we show that E2F1 is a potent and specific inhibitor of β-catenin/T-cell factor (TCF)-dependent transcription, and that this function contributes to E2F1-induced apoptosis. E2F1 deregulation suppresses β- catenin activity in an adenomatous polyposis coli (APC)/glycogen synthase kinase-3 (GSK3)-independent manner, reducing the expression of key β-catenin targets including c-MYC. This interaction explains why colorectal tumors, which depend on β-catenin transcription for their abnormal proliferation, keep RB1 intact. Remarkably, E2F1 activity is also repressed by cyclin-dependent kinase-8 (CDK8), a colorectal oncoprotein. Elevated levels of CDK8 protect β-catenin/TCF-dependent transcription from inhibition by E2F1. Thus, by retaining RB1 and amplifying CDK8, colorectal tumor cells select conditions that collectively suppress E2F1 and enhance the activity of β-catenin.
登录
查看更多内容
影响因子:
7.7
作者:
Freeman, M;Bienz, M
通讯作者:
Bienz, M
DOI:
10.1073/pnas.0504300102
发表时间:
2005-11-01
影响因子:
11.1
作者:
Black, EP;Hallstrom, T;Nevins, JR
通讯作者:
Nevins, JR
影响因子:
64.8
作者:
Sansom, Owen J.;Meniel, Valerie S.;Clarke, Alan R.
通讯作者:
Clarke, Alan R.
影响因子:
64.8
作者:
O'Donnell, KA;Wentzel, EA;Mendell, JT
通讯作者:
Mendell, JT
影响因子:
8
作者:
Rother, K;Johne, C;Engeland, K
通讯作者:
Engeland, K