Review www.cell-stress.com MST kinases in innate immune signaling Zhubing Shi1 and Zhaocai Zhou1,2* 1 State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China. 2 School of Life Science and Technology, ShanghaiTech University, Shanghai, China. * Corresponding Author: Zhaocai Zhou, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue-Yang Road, Shanghai 200031, China. Phone/Fax: 86-21-54921291; E-mail:
[email protected] ABSTRACT The mammalian STE20-like (MST) protein kinases are composed of doi: 10.15698/cst2018.01.119 MST1, MST2, MST3, MST4 and YSK1. They play crucial roles in cell growth, Received originally: 05.11.2017 migration, polarity and apoptosis. Dysfunction of these kinases often leads to in revised form: 06.12.2017, Accepted 07.12.2017, diseases. MST kinases are extensively involved in development and function Published 23.12.2017. of immune system. Here, we review recent progresses on the regulatory func- tion of MST kinases in innate immune signaling. Keywords: MST kinases, innate immunity, TLR signaling, antiviral signaling. Abbreviations: dsRNA – double-stranded RNA GCK – germinal center kinase, HCC – hepatocellular carcinoma, IFN – interferon, LPS – lipopolysaccharide, mROS – mitochondrial ROS Poly(I:C) – polyinosinic-polycytidylic acid, RLR – RIG-I-like receptor, ROS – reactive oxygen species, STRN – striatin, TLR – Toll-like receptor. INTRODUCTION SAV1 and MOB1A/B, MST1/2 can activate downstream The MST kinases are evolutionarily conserved homologues kinases LATS1/2, leading to the phosphorylation and inhibi- of yeast Sterile20 (STE20) kinase [1].