CRL2(LRR-1) targets a CDK inhibitor for cell cycle control in C. elegans and actin-based motility regulation in human cells.

CRL2(LRR-1) targets a CDK inhibitor for cell cycle control in C. elegans and actin-based motility regulation in human cells.
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DOI:
10.1016/j.devcel.2010.10.013
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发表时间:
2010-11-16
期刊:
影响因子:
11.8
通讯作者:
Kipreos, Edward T.
Kipreos, Edward T.
中科院分区:
生物学1区
文献类型:
--
作者:
Starostina, Natalia G.;Simpliciano, Jennifer M.;McGuirk, Michael A.;Kipreos, Edward T.

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Cip/Kip CDK抑制剂(CKI)p21 Cip 1/WAF 1在细胞核中通过抑制CDK-细胞周期蛋白复合物来限制细胞增殖具有关键作用。相反,胞质p21调节细胞存活和肌动蛋白细胞骨架。p21在不同细胞区室中的这些不同功能表明复杂调控的必要性。在这项研究中,我们鉴定了CRL 2LRR-1泛素连接酶作为Cip/Kip CKIs的保守调节剂,其促进C.线虫CKI-1和人p21。线虫CRL 2LRR-1复合物负调节细胞核CKI-1水平,以确保生殖细胞的G1期细胞周期进展。相反,人CRL 2LRR 1靶向细胞质p21,作为细胞运动的关键调节因子,通过阻止p21抑制Rho/ROCK/LIMK途径来促进非运动的静止细胞状态。人CRL 2LRR 1的失活导致肌动蛋白解聚蛋白cofilin的激活,肌动蛋白细胞骨架的显著重组,以及细胞运动性的增加。
The Cip/Kip CDK inhibitor (CKI) p21Cip1/WAF1 has a critical role in the nucleus to limit cell proliferation by inhibiting CDK-cyclin complexes. In contrast, cytoplasmic p21 regulates cell survival and the actin cytoskeleton. These divergent functions for p21 in different cellular compartments suggest the necessity for complex regulation. In this study, we identify the CRL2LRR-1 ubiquitin ligase as a conserved regulator of Cip/Kip CKIs that promotes the degradation of C. elegans CKI-1 and human p21. The nematode CRL2LRR-1 complex negatively regulates nuclear CKI-1 levels to ensure G1-phase cell cycle progression in germ cells. In contrast, human CRL2LRR1 targets cytoplasmic p21, acting as a critical regulator of cell motility that promotes a non-motile, stationary cell state by preventing p21 from inhibiting the Rho/ROCK/LIMK pathway. Inactivation of human CRL2LRR1 leads to the activation of the actin-depolymerizing protein cofilin, dramatic reorganization of the actin cytoskeleton, and increased cell motility.
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发表时间: 2003-02-15
影响因子: 5.3
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