Open AccessFunctional Network Analysis Reveals the Relevance of SKIIP in the Regulation of Alternative Splicing by p38 SAPK
Author(s) -
Caterina Carbonell,
Arnau Ulsamer,
Claudia Vivori,
Panagiotis Papasaikas,
René Böttcher,
Manel Joaquin,
Belén Miñana,
Juan Ramón Tejedor,
Eulàlia de Nadal,
Juan Valcárcel,
Francesc Posas
Publication year - 2019
Publication title -
cell reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.264
H-Index - 154
eISSN - 2639-1856
pISSN - 2211-1247
DOI - 10.1016/j.celrep.2019.03.060
Subject(s) - spliceosome , rna splicing , biogenesis , microbiology and biotechnology , alternative splicing , phosphorylation , p38 mitogen activated protein kinases , kinase , biology , chemistry , protein kinase a , rna , gene isoform , gene , genetics
Alternative splicing is a prevalent mechanism of gene regulation that is modulated in response to a wide range of extracellular stimuli. Stress-activated protein kinases (SAPKs) play a key role in controlling several steps of mRNA biogenesis. Here, we show that osmostress has an impact on the regulation of alternative splicing (AS), which is partly mediated through the action of p38 SAPK. Splicing network analysis revealed a functional connection between p38 and the spliceosome component SKIIP, whose depletion abolished a significant fraction of p38-mediated AS changes. Importantly, p38 interacted with and directly phosphorylated SKIIP, thereby altering its activity. SKIIP phosphorylation regulated AS of GADD45α, the upstream activator of the p38 pathway, uncovering a negative feedback loop involving AS regulation. Our data reveal mechanisms and targets of SAPK function in stress adaptation through the regulation of AS.
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