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7. Tracking Stress Granule Dynamics in Live Cells and In Vivowith a Small Molecule

Author

Shao, Wen, Zeng, Shu-Tang, Yu, Ze-Yi, Tang, Gui-Xue, Chen, Shuo-Bin, Huang, Zhi-Shu, Chen, Xiu-Cai, and Tan, Jia-Heng

Abstract

Because of the lack of facile and accurate methods to track stress granule (SG) dynamics in live cells and in vivo, in-depth studies of the biological roles of this attractive membraneless organelle have been limited. Herein, we report the first small-molecule probe, TASG, for the selective, convenient and real-time monitoring of SGs. This novel molecule can simultaneously bind to SG RNAs, the core SG protein G3BP1, and their complexes, triggering a significant enhancement in fluorescence intensity, making TASGbroadly applicable to SG imaging under various stress conditions in fixed and live cells, ex vivoand in vivo. Using TASG, the complicated endogenous SG dynamics were revealed in both live cells and C. elegans. Collectively, our work provides an ideal probe that has thus far been absent in the field of SG investigations. We anticipate that this powerful tool may create exciting opportunities to investigate the underlying roles of SGs in different organisms.

Published
2021
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