替代多基化因子CPSF6调节哺乳动物昼夜钟的温度补偿
Christoph Schmal1, Bert Maier2, Reut Ashwal-Fluss3
1Institute for Theoretical Biology, Humboldt-Universität zu Berlin and Charité-Universitätsmedizin Berlin, Berlin, Germany.
PLoS biology
|June 28, 2023
概括
循环时钟保持稳定的24小时周期,尽管温度变化. 切割和多化特异性因子6 (CPSF6) 的淘汰破坏了这种温度补偿,揭示了对昼夜节律的新分子洞察力.
科学领域:
- 时间生物学 时间生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 循环时钟表现出温度补偿,在生理温度之间保持近24小时的时间段.
- 这种关键的温度补偿背后的分子机制尚未完全理解.
- 涉及到像替代拼接和酸化这样的转录后机制.
研究的目的:
- 研究裂变和多化特异性因子6 (CPSF6) 在昼夜温度补偿中的作用.
- 用系统生物学方法识别参与温度补偿的分子参与者.
主要方法:
- 使用了人类U-2 OS细胞与CPSF6敲击.
- 使用3'-end RNA测序 (3'-end-RNA-seq) 来分析3' UTR长度的变化.
- 应用基于质谱的蛋白质组学来评估基因和蛋白质表达.
- 统计分析了野生类型和CPSF6淘汰细胞之间的差温反应.
主要成果:
- 在人体细胞中,CPSF6 knockdown显著改变了昼夜温度补偿.
- 全球分析显示,3' UTR长度,基因和蛋白质表达的温度依赖的变化.
- 确定了候选基因,包括真核转化启动因子2亚单元1 (EIF2S1),可能参与昼夜温度补偿.
结论:
- CPSF6在昼夜时钟的温度补偿中发挥着重要作用.
- 这项研究为CPSF6.6对昼夜节律的分子调节提供了新的见解.
- 确定了候选基因,需要进一步研究它们在温度补偿机制中的作用.
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