Carbonell Núñez, Caterina, 1987-Ulsamer, ArnauVivori, Claudia, 1989-Papasaikas, PanagiotisBöttcher, RenéJoaquin i Caudet, ManelMiñana Gómez, BelénTejedor Vaquero, Juan Ramón, 1984-Nadal Clanchet, Eulàlia deValcárcel, J. (Juan)Posas Garriga, Francesc2019-06-202019-06-202019Carbonell C, Ulsamer A, Vivori C, Papasaikas P, Böttcher R, Joaquin M et al. Functional network analysis reveals the relevance of SKIIP in the regulation of alternative splicing by p38 SAPK. Cell Rep. 2019;27(3):847-59. DOI: 10.1016/j.celrep.2019.03.0602211-1247http://hdl.handle.net/10230/41848Alternative 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.application/pdfeng© Elsevier This is the published version of an article http://dx.doi.org/10.1016/j.celrep.2019.03.060 that appeared in the journal Cell reports. It is published in an Open Archive under an Elsevier user license. Details of this licence are available here: https://www.elsevier.com/about/our-business/policies/open-access-licenses/elsevier-user-licenseinfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.celrep.2019.03.060Cell signalingp38 SAPKAlternative splicingStress responsesGADD45info:eu-repo/semantics/openAccess