p38-MK2 signaling axis regulates RNA metabolism after UV-light-induced DNA damage
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- p38-MK2 signaling axis regulates RNA metabolism after UV-light-induced DNA damage
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Ultraviolet (UV) light radiation induces the formation of bulky photoproducts in the DNA that globally affect transcription and splicing. However, the signaling pathways and mechanisms that link UV-light-induced DNA damage to changes in RNA metabolism remain poorly understood. Here we employ quantitative phosphoproteomics and protein kinase inhibition to provide a systems view on protein phosphorylation patterns induced by UV light and uncover the dependencies of phosphorylation events on the canonical DNA damage signaling by ATM/ATR and the p38 MAP kinase pathway. We identify RNA-binding proteins as primary substrates and 14-3-3 as direct readers of p38-MK2-dependent phosphorylation induced by UV light. Mechanistically, we show that MK2 phosphorylates the RNA-binding subunit of the NELF complex NELFE on Serine 115. NELFE phosphorylation promotes the recruitment of 14-3-3 and rapid dissociation of the NELF complex from chromatin, which is accompanied by RNA polymerase II elongation.
Original language | English |
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Article number | 1017 |
Journal | Nature Communications |
Volume | 9 |
Pages (from-to) | 1-16 |
Number of pages | 16 |
ISSN | 2041-1723 |
DOIs | |
Publication status | Published - 1 Dec 2018 |
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