在UnkemptRNA结合蛋白揭示了一个本地翻译程序在中心极过重复的过重复
Abraham Martinez1, Alexander J Stemm-Wolf1, Ryan M Sheridan2
1Department of Cell and Developmental Biology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045.
bioRxiv : the preprint server for biology
|August 12, 2024
概括
与癌症相关的中间体放大涉及Plk4调节. 未经处理的蛋白质通过增强中心体的局部翻译来促进中心体过重复,揭示了细胞分裂控制的新机制.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 中心细胞组合受到严格管制,以防止细胞分裂和信号传递的缺陷.
- Plk4 (Polo-like kinase 4) 是中心重复的一个关键调节器;高的Plk4水平导致中心放大 (CA),这是瘤发生的标志.
研究的目的:
- 研究Plk4水平升高的转录和翻译后果.
- 阐明Unkempt (Unk) 蛋白在Plk4诱导的中心体放大中的作用.
主要方法:
- 转录分析以确定由升高的Plk4.4上调调节的基因.
- 免疫光显微镜用于确定蛋白质定位 (Unk, Cep131, CNOT9).
- 功能性测试,以评估Unk的RNA结合活性在中心过重复中的要求.
主要成果:
- Unkempt (Unk),一种RNA结合蛋白,被确定为一个显著上调的基因,以应对升高的Plk4.
- Unk 蛋白定位在中心体和中心卫星上,对于 Plk4 诱导的中心点过重复是必不可少的.
- Unk和Cep131促进了中心体和中心卫星的局部翻译,在Plk4诱导的CA中早期发生过渡性下调,涉及CNOT9.
结论:
- 中心卫星和Unk编排本地化翻译,形成中心极重复的关键翻译程序.
- 这项研究揭示了Unk在调节中心体局部翻译中的作用,作为控制中心体重复和防止中心体放大的一个关键机制.
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