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Regulation of the Hippo–YAP pathway by protease-activated receptors (PARs)

by: Jung-Soon Mo, Fa-Xing Yu, Rui Gong, Joan H. Brown, Kun-Liang Guan
Genes & Development (12 September 2012), doi:10.1101/gad.197582.112  Key: citeulike:11263987

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Abstract

The Hippo signaling pathway plays a crucial role in tissue growth and tumorigenesis. Core components of the Hippo pathway include the MST1/2 and Lats1/2 kinases. Acting downstream from the Hippo pathway are the YAP/TAZ transcription coactivators, which are inhibited through phosphorylation by Lats. However, upstream signals that regulate the Hippo pathway have not been well delineated. Here we report that stimulation of protease-activated receptors (PARs) activates YAP/TAZ by decreasing phosphorylation and increasing nuclear localization. PAR1 acts through G12/13 and Rho GTPase to inhibit the Lats1/2 kinase. Our observations establish thrombin as a physiological signal for the Hippo pathway and implicate Hippo–YAP as a key downstream signaling branch of PAR activation


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