Intrinsic negative cell cycle regulation provided by PIP box- and Cul4Cdt2-mediated destruction of E2f1 during S phase.
Intrinsic negative cell cycle regulation provided by PIP box- and Cul4Cdt2-mediated destruction of E2f1 during S phase.
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DOI:
10.1016/j.devcel.2008.10.003
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发表时间:
2008-12
影响因子:
11.8
通讯作者:
Duronio, Robert J.
中科院分区:
文献类型:
--
作者:
Shibutani, Shusaku T.;de la Cruz, Aida Flor A.;Tran, Vuong;Turbyfill, William J., III;Reis, Tania;Edgar, Bruce A.;Duronio, Robert J.
E2F transcription factors are key regulators of cell proliferation that are inhibited by pRb family tumor suppressors. pRb-independent modes of E2F inhibition have also been described, but their contribution to animal development and tumor suppression is unclear. Here we show that S phase-specific destruction of Drosophila E2f1 provides a novel mechanism for cell cycle regulation. E2f1 destruction is mediated by a PCNA-interacting-protein (PIP) motif in E2f1 and the Cul4Cdt2 E3 ubiquitin ligase, and requires the Dp dimerization partner but not direct Cdk phosphorylation or Rbf1 binding. E2f1 lacking a functional PIP motif accumulates inappropriately during S phase and is more potent than wild type E2f1 at accelerating cell cycle progression and inducing apoptosis. Thus, S phase-coupled destruction is a key negative regulator of E2f1 activity. We propose that pRb-independent inhibition of E2F during S phase is an evolutionarily conserved feature of the metazoan cell cycle that is necessary for development.
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影响因子:
4.8
作者:
Hu, J;Xiong, Y
通讯作者:
Xiong, Y
影响因子:
5.3
作者:
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作者:
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IVEYHOYLE, M
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10.5
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11.4
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