MST2 Proteins

Protein Information

STK3 (MST2) is a STE kinase family member that acts upstream of the MAP kinase signaling pathways, and is known to be activated by the proapoptotic stimuli staurosporine and FAS ligand. STK3 is a stress-activated, pro-apoptotic kinase which, following caspase-cleavage, enters the nucleus and induces chromatin condensation followed by internucleosomal DNA fragmentation. It is a key component of the Hippo signaling pathway which plays a pivotal role in organ size control and tumor suppression by restricting proliferation and promoting apoptosis. The core of this pathway is composed of a kinase cascade wherein STK3/MST2 and STK4/MST1, in complex with its regulatory protein SAV1, phosphorylates and activates LATS1/2 in complex with its regulatory protein MOB1, which in turn phosphorylates and inactivates YAP1 oncoprotein and WWTR1/TAZ. Phosphorylation of YAP1 by LATS2 inhibits its translocation into the nucleus to regulate cellular genes important for cell proliferation, cell death, and cell migration. STK3/MST2 and STK4/MST1 are required to repress proliferation of mature hepatocytes, to prevent activation of facultative adult liver stem cells (oval cells), and to inhibit tumor formation.

同义词

0610042I06Rik; KB-1458E12.1; KRS1; Mammalian STE20-like protein kinase 2; mess1; MST; Mst2; MST-2; MST2/C; MST2/N; Mst3; protein kinase homolog; serine/threonine kinase 3; serine/threonine kinase 3 (STE20 homolog, yeast); serine/threonine kinase 3 (Ste20, yeast homolog); serine/threonine-protein kinase 3; Serine/threonine-protein kinase 3 20kDa subunit; Serine/threonine-protein kinase 3 36kDa subunit; Serine/threonine-protein kinase Krs-1; Ste20; STE20-like kinase MST2; STK3; wu:fc19e11; zgc:55383