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Learn MoreWe report systematical profiling of translation efficiency and mRNA stability dependent on the dynamics of poly(A)-tail length in stress conditions of human cells. In this study, we developed a new feasible method measuring poly(A)-tail length called TED-seq and applied it to investigate the change of mRNA's poly(A)-tail lengths in ER stress pharmacologically induced by thapsigargin (THAP). Combined with other global RNA analyses such as RNA-seq, Ribo-seq and PRO-seq, we observed that ER stress induced lenthening poly(A)-tail length, in particular of ER-stress-regulators, upon ER stress. More specifically, these mRNAs are translationally de-repressed and more stabilized based on increase in poly(A)-tail length. We also identified that insoluble fractions which include stress-induced RNA-granules have overall shorter length of poly(A) tail. Taken together, our data suggest that poly(A)-tail lengths are dynamically regulated and influence both translation efficiency and mRNA stability in ER stress. SOURCE: Yumi Woo (yw768@cornell.edu) - Kwak Lab Cornell University
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