High-fidelity reconstitution of stress granules and nucleoli in mammalian cellular lysate.

High-fidelity reconstitution of stress granules and nucleoli in mammalian cellular lysate.
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哺乳动物细胞裂解物中应激颗粒和核仁的高保真重建。

DOI:
10.1083/jcb.202009079
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发表时间:
2021-03-01
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Taylor JP
Taylor JP
中科院分区:
其他
文献类型:
--
作者:
Freibaum BD;Messing J;Yang P;Kim HJ;Taylor JP

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Freibaum,Messing等人提出了一种系统,该系统允许高保真重构哺乳动物细胞裂解物中的应激颗粒和核仁的颗粒组分。该系统允许各种无膜细胞器的研究,包括治疗的发展,修改特定的冷凝物的性能。液-液相分离(LLPS)是细胞内组织的一种机制,是各种RNP颗粒组装的基础。基本的生物物理学原理,在颗粒组装过程中LLPS已被揭示了简单的体外系统,但这些系统有局限性,当研究复杂的,多组分RNP颗粒的生物学。细胞中RNP颗粒的可视化已经验证了由简单的体外系统揭示的关键原理,但是这种方法对于询问RNP颗粒的生物物理特征存在困难,并且提供了有限的能力来操纵蛋白质、核酸或小分子浓度。在这里,我们介绍了一个系统,建立在最近的见解RNP颗粒组装的机制,并允许高保真重建的应力颗粒和哺乳动物细胞裂解物中的核仁的颗粒成分。该系统填补了简单的体外系统和活细胞之间的差距,并允许对无膜细胞器进行各种研究,包括开发改变特定冷凝物性质的治疗方法。
Freibaum, Messing, et al. present a system that permits high-fidelity reconstitution of stress granules and the granular component of nucleoli in mammalian cellular lysate. This system permits a variety of membraneless organelle studies, including the development of therapeutics that modify properties of specific condensates. Liquid–liquid phase separation (LLPS) is a mechanism of intracellular organization that underlies the assembly of a variety of RNP granules. Fundamental biophysical principles governing LLPS during granule assembly have been revealed by simple in vitro systems, but these systems have limitations when studying the biology of complex, multicomponent RNP granules. Visualization of RNP granules in cells has validated key principles revealed by simple in vitro systems, but this approach presents difficulties for interrogating biophysical features of RNP granules and provides limited ability to manipulate protein, nucleic acid, or small molecule concentrations. Here, we introduce a system that builds upon recent insights into the mechanisms underlying RNP granule assembly and permits high-fidelity reconstitution of stress granules and the granular component of nucleoli in mammalian cellular lysate. This system fills the gap between simple in vitro systems and live cells and allows for a variety of studies of membraneless organelles, including the development of therapeutics that modify properties of specific condensates.
肌萎缩性侧索硬化和额颞痴呆的TIA1突变促进相位分离并改变应激颗粒动力学。
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