GIGYF1/2-Driven Cooperation between ZNF598 and TTP in Posttranscriptional Regulation of Inflammatory Signaling

Maxim A X Tollenaere, Christopher Tiedje, Simon Rasmussen, Julie C Nielsen, Anna C Vind, Melanie Blasius, Tanveer S Batth, Niels Mailand, Jesper V Olsen, Matthias Gaestel, Simon Bekker-Jensen*

*Corresponding author af dette arbejde
13 Citationer (Scopus)
5 Downloads (Pure)

Abstract

Inflammatory signaling is restricted through degradation and the translational repression of cytokine mRNAs. A key factor in this regulation is tristetraprolin (TTP), an RNA-binding protein (RBP) that recruits RNA-destabilizing factors and the translation inhibitory complex 4EHP-GIGYF1/2 to AU-rich element (ARE)-containing mRNAs. Here, we show that the RBP ZNF598 contributes to the same regulatory module in a TTP-like manner. Similar to TTP, ZNF598 harbors three proline-rich motifs that bind the GYF domain of GIGYF1. RNA sequencing experiments showed that ZNF598 is required for the regulation of known TTP targets, including IL-8 and CSF2 mRNA. Furthermore, we demonstrate that ZNF598 binds to IL-8 mRNA, but not TNF mRNA. Collectively, our findings highlight that ZNF598 functions as an RBP that buffers the level of a range of mRNAs. We propose that ZNF598 is a TTP-like factor that can contribute to the regulation of the inflammatory potential of cytokine-producing cells. Tollenaere et al. highlight a structural and functional resemblance between the ribosome-associated ubiquitin ligase ZNF598 and TTP, the negative regulator of inflammation-associated mRNA stability. Like TTP, ZNF598 contains proline stretches that are bound by GYF domain-containing proteins, binds cytokine mRNAs, and represses inflammatory signaling in resting cells.

OriginalsprogEngelsk
TidsskriftCell Reports
Vol/bind26
Udgave nummer13
Sider (fra-til)3511-3521.e4
Antal sider16
ISSN2211-1247
DOI
StatusUdgivet - 26 mar. 2019

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