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A PARP14/TARG1-Regulated RACK1 MARylation Cycle Drives Stress Granule Dynamics in Cancer Cells [RNA-seq]

ABSTRACT: In this study we examine the role of RACK1 MARylation in stress granule assembly and translational regulation in ovarian cancer cells. In addition, we describe the role of TARG1, an ADPR hydrolase enzyme in stress granule assembly and translation.

ORGANISM(S): Homo sapiens

PROVIDER: GSE245502 | GEO | 2025/01/02

REPOSITORIES: GEO

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A PARP14/TARG1-Regulated RACK1 MARylation Cycle Drives Stress Granule Dynamics in Cancer Cells [Ribo-seq]

Project description:In this study we examine the role of RACK1 MARylation in stress granule assembly and translational regulation in ovarian cancer cells. In addition, we describe the role of TARG1, an ADPR hydrolase enzyme in stress granule assembly and translation.

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A PARP14/TARG1-Regulated RACK1 MARylation Cycle Drives Stress Granule Dynamics in Cancer Cells

Project description:A PARP14/TARG1-Regulated RACK1 MARylation Cycle Drives Stress Granule Dynamics in Cancer Cells

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A PARP14/TARG1-Regulated RACK1 MARylation Cycle Drives Stress Granule Dynamics in Cancer Cells [RNA-seq]

Project description:A PARP14/TARG1-Regulated RACK1 MARylation Cycle Drives Stress Granule Dynamics in Cancer Cells [RNA-seq]

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Project description:Ribonucleoprotein (RNP) granules are non-membrane bound organelles thought to assemble by protein-protein interactions of RNA-binding proteins. We present evidence that a wide variety of RNAs self-assemble in vitro into either liquid-liquid phase separations or more stable assembles, referred to as RNA tangles. Self-assembly in vitro is affected by RNA length, ionic conditions, and sequence. Remarkably, self-assembly of yeast RNA in vitro under physiological salt mimics the composition of mRNAs within yeast stress granules. This suggests that the biophysical principles that drive RNA self-assembly in vitro contribute to determining the stress granule transcriptome. Consistent with RNA self-assembly contributing to RNP granule formation, an excess of purified RNA injected into C. elegans syncytium coalesces into droplet-like assemblies. We suggest that diverse RNA-RNA interactions in trans contribute to RNP granule formation and may explain the prevalence of large RNA-protein assemblies in eukaryotic cells.

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