Journal Article

Phosphorylation of steroid receptor coactivator-3 (SRC-3) at serine 857 is regulated by the p38MAPK-MK2 axis and affects NF-κB-mediated transcription

Gaestel, Matthias, Wetting, Hilde Ljones, Mikkola, Ingvild, Seternes, Ole-Morten, Kildalsen, Hanne, Shrestha, Anup, Bruckmueller, Henrike, Kaur, Gurjit

2020

Overview

Steroid receptor coactivator-3 (SRC-3) regulates the activity of both nuclear hormone receptors and a number of key transcription factors. It is implicated in the regulation of cell proliferation, inflammation and in the progression of several common cancers including breast, colorectal and lung tumors. Phosphorylation is an important regulatory event controlling the activities of SRC-3. Serine 857 is the most studied phospho-acceptor site, and its modification has been reported to be important for SRC-3-dependent tumor progression. In this study, we show that the stress-responsive p38 MAPK -MK2 signaling pathway controls the phosphorylation of SRC-3 at S857 in a wide range of human cancer cells. Activation of the p38 MAPK -MK2 pathway results in the nuclear translocation of SRC-3, where it contributes to the transactivation of NF-kB and thus regulation of IL-6 transcription. The identification of the p38 MAPK -MK2 signaling axis as a key regulator of SRC-3 phosphorylation and activity opens up new possibilities for the development and testing of novel therapeutic strategies to control both proliferative and metastatic tumor growth.

• Publisher: Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
• Subject: 631/45 / 631/80 / Breast / Cell activation / Cell proliferation / Gene regulation / Humanities and Social Sciences / Interleukin 6 / Kinases / Lung cancer / Metastases / multidisciplinary / NF-κB protein / Nuclear receptors / Nuclear transport / Phosphorylation / Science / Science (multidisciplinary) / Serine / Signal transduction / Steroids / Transcription factors / Translocation / Tumors