CDK1 and CDK2 regulate phosphorylation-dependent NICD1 turnover and the periodicity of the segmentation clock

CDK1 and CDK2 regulate phosphorylation-dependent NICD1 turnover and the periodicity of the segmentation clock
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CDK1 和 CDK2 调节磷酸化依赖性 NICD1 周转和分段时钟的周期性

DOI:
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发表时间:
2018
期刊:
bioRxiv
影响因子:
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通讯作者:
J. Dale
J. Dale
中科院分区:
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文献类型:
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作者:
F. Carrieri;P. Murray;Paul Davies;J. Dale

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所有脊椎动物都有一个分段的身体轴。节段从体节前中胚层 (PSM) 的喙端周期性地形成,并且这种周期性由节节时钟调节,节节时钟是一种分子振荡器,驱动整个 PSM 的动态时钟基因表达,其周期性与体节形成相匹配。缺口信号传导对于这个过程至关重要。改变 Notch 胞内域 (NICD) 稳定性会影响时钟周期和体节大小。然而,NICD 稳定性如何调节的机制细节尚不清楚。我们发现了一个高度保守的位点,对于 SCF E3 连接酶识别 NICD 至关重要,该连接酶以 NICD 为目标进行降解。我们证明 CDK1 和 CDK2 都可以在这个关键残基所在的域中磷酸化 NICD,并且 NICD 水平以细胞周期依赖性方式变化。抑制 CDK1 或 CDK2 活性会增加体外和体内的 NICD 水平,导致时钟基因振荡延迟。
All vertebrates share a segmented body axis. Segments form periodically from the rostral end of the presomitic mesoderm (PSM) and this periodicity is regulated by the segmentation clock, a molecular oscillator that drives dynamic clock gene expression across the PSM with a periodicity that matches somite formation. Notch signalling is crucial to this process. Altering Notch intracellular domain (NICD) stability affects both the clock period and somite size. However, the mechanistic details of how NICD stability is regulated are unclear. We identified a highly conserved site crucial for NICD recognition by the SCF E3 ligase, which targets NICD for degradation. We demonstrate both CDK1 and CDK2 can phosphorylate NICD in the domain where this crucial residue lies and that NICD levels vary in a cell cycle-dependent manner. Inhibiting CDK1 or CDK2 activity increases NICD levels both in vitro and in vivo, leading to a delay of clock gene oscillations.
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