| Autor: |
Anthony M. Ciancone, Seyyedmohsen Hosseinibarkooie, Dina L. Bai, Adam L. Borne, Heather A. Ferris, Ku-Lung Hsu |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Cell Chemical Biology. 29:1709-1720.e7 |
| ISSN: |
2451-9456 |
| DOI: |
10.1016/j.chembiol.2022.11.008 |
| Popis: |
RNA granules are cytoplasmic condensates that organize biochemical and signaling complexes in response to cellular stress. Functional proteomic investigations under RNA-granule-inducing conditions are needed to identify protein sites involved in coupling stress response with ribonucleoprotein regulation. Here, we apply chemical proteomics using sulfonyl-triazole (SuTEx) probes to capture cellular responses to oxidative and nutrient stress. The stress-responsive tyrosine and lysine sites detected mapped to known proteins involved in processing body (PB) and stress granule (SG) pathways, including LSM14A, FUS, and Enhancer of mRNA-decapping protein 3 (EDC3). Notably, disruption of EDC3 tyrosine 475 (Y475) resulted in hypo-phosphorylation at S161 and S131 and altered protein-protein interactions (PPIs) with decapping complex components (DDX6, DCP1A/B) and 14-3-3 proteins. This resulting mutant form of EDC3 was capable of rescuing the PB-deficient phenotype of EDC3 knockout cells. Taken together, our findings identify Y475 as an arsenic-responsive site that regulates RNA granule formation by coupling EDC3 post-translational modification and PPI states. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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