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Updated: Jan 3, 2026

Methods to Classify Cytoplasmic Foci as Mammalian Stress Granules
Published on: May 12, 2017
Sky1: at the intersection of prion-like proteins and stress granule regulation
Jenifer E Shattuck1, Sean M Cascarina1, Kacy R Paul1
1Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO, 80523, USA.
Abstract:
Serine-arginine (SR) protein kinases regulate diverse cellular activities, including various steps in RNA maturation and transport. The yeast Saccharomyces cerevisiae expresses a single SR kinase, Sky1. Sky1 has a bipartite kinase domain, separated by an aggregation-prone prion-like domain (PrLD). The assembly of PrLDs is involved in the formation of various membraneless organelles, including stress granules; stress granules are reversible ribonucleoprotein assemblies that form in response to a variety of stresses. Here, we review a recent study suggesting that Sky1's PrLD promotes Sky1 recruitment to stress granules, and that Sky1 regulates stress granule dissolution by phosphorylating the RNA-shuttling protein Npl3.
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