The circadian coordination of cell biology.

The circadian coordination of cell biology.
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DOI:
10.1083/jcb.201603076
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发表时间:
2016-10-10
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Panda S
Panda S
中科院分区:
其他
文献类型:
--
作者:
Chaix A;Zarrinpar A;Panda S

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Chaix等人回顾了细胞如何产生昼夜节律振荡以及生物钟如何控制细胞生物学。生物钟是细胞自主的定时机制,以24小时为周期组织细胞功能。在哺乳动物中,主要的昼夜节律振荡器由转录调节因子、酶和支架组成的转录-翻译反馈回路组成,这些回路产生并维持其自身转录物和蛋白质水平的每日振荡。时钟组件及其靶标通过转录、转录后、翻译和翻译后机制赋予许多基因产物节律功能。这反过来又在时间上协调了许多信号通路、代谢活动、细胞器的结构和功能,以及细胞周期和分化细胞的组织特异性功能。当这些昼夜节律振荡器的功能被年龄、环境或基因突变破坏时,细胞功能的时间协调就会丧失,从而降低机体的健康和适应性。
Chaix et al. review how cells generate circadian oscillations and how circadian clocks control cell biology. Circadian clocks are cell-autonomous timing mechanisms that organize cell functions in a 24-h periodicity. In mammals, the main circadian oscillator consists of transcription–translation feedback loops composed of transcriptional regulators, enzymes, and scaffolds that generate and sustain daily oscillations of their own transcript and protein levels. The clock components and their targets impart rhythmic functions to many gene products through transcriptional, posttranscriptional, translational, and posttranslational mechanisms. This, in turn, temporally coordinates many signaling pathways, metabolic activity, organelles’ structure and functions, as well as the cell cycle and the tissue-specific functions of differentiated cells. When the functions of these circadian oscillators are disrupted by age, environment, or genetic mutation, the temporal coordination of cellular functions is lost, reducing organismal health and fitness.
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