首页> 外文期刊>Molecular and Cellular Biology >The Rb-related p107 protein can suppress E2F function independently of binding to cyclin A/cdk2.
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The Rb-related p107 protein can suppress E2F function independently of binding to cyclin A/cdk2.

机译:Rb相关的p107蛋白可以独立于与细胞周期蛋白A / cdk2结合而抑制E2F功能。

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The interaction of the retinoblastoma susceptibility gene product (Rb)-related p107 protein with the E2F transcription factor in S-phase cells facilitates the formation of a multicomponent complex also containing cyclin A and the p33cdk2 kinase. We have created a series of p107 mutants to assess the ability of p107 to inhibit E2F function and the role of the cyclin A/cdk2 complex in this process. We find that p107 mutants that do not bind to E2F also fail to repress E2F-dependent transcription. Moreover, we find that the ability of p107 to suppress E2F-dependent transcription is not dependent on the ability of p107 to associate with cyclin A/cdk2. Finally, an analysis of the ability of the p107 mutant proteins to suppress cell growth suggests that both E2F-dependent and E2F-independent events correlate with this activity.
机译:视网膜母细胞瘤易感基因产物(Rb)相关的p107蛋白与S期细胞中E2F转录因子的相互作用促进了也包含细胞周期蛋白A和p33cdk2激酶的多组分复合物的形成。我们创建了一系列p107突变体,以评估p107抑制E2F功能的能力以及细胞周期蛋白A / cdk2复合物在此过程中的作用。我们发现不结合E2F的p107突变体也无法抑制E2F依赖的转录。此外,我们发现p107抑制E2F依赖性转录的能力并不取决于p107与细胞周期蛋白A / cdk2缔合的能力。最后,对p107突变蛋白抑制细胞生长的能力的分析表明,E2F依赖性和E2F依赖性事件均与此活性相关。

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