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Essig, Katharina; Kronbeck, Nina; Guimaraes, Joao C; Lohs, Claudia; Schlundt, Andreas; Hoffmann, Anne; Behrens, Gesine; Brenner, Sven; Kowalska, Joanna; Lopez-Rodriguez, Cristina; Jemielity, Jacek; Holtmann, Helmut; Reiche, Kristin; Hackermüller, Jörg; Sattler, Michael; Zavolan, Mihaela; Heissmeyer, Vigo
Nature communications, 09/2018, Letnik: 9, Številka: 1Journal Article
The RNA-binding proteins Roquin-1 and Roquin-2 redundantly control gene expression and cell-fate decisions. Here, we show that Roquin not only interacts with stem-loop structures, but also with a linear sequence element present in about half of its targets. Comprehensive analysis of a minimal response element of the Nfkbid 3'-UTR shows that six stem-loop structures cooperate to exert robust and profound post-transcriptional regulation. Only binding of multiple Roquin proteins to several stem-loops exerts full repression, which redundantly involved deadenylation and decapping, but also translational inhibition. Globally, most Roquin targets are regulated by mRNA decay, whereas a small subset, including the Nfat5 mRNA, with more binding sites in their 3'-UTRs, are also subject to translational inhibition. These findings provide insights into how the robustness and magnitude of Roquin-mediated regulation is encoded in complex cis-elements.
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