MST2 Protein, Human (Active, sf9, GST)

MST2 protein, a stress-activated, pro-apoptotic kinase, contributes to various cellular processes, serving as a key component in the Hippo signaling pathway that plays a central role in organ size control and tumor suppression. Upon caspase-cleavage, MST2 enters the nucleus, inducing chromatin condensation and internucleosomal DNA fragmentation, promoting apoptosis. In the Hippo pathway, MST2, along with its counterpart STK4/MST1 and the regulatory protein SAV1, forms a kinase cascade crucial for phosphorylating and activating LATS1/2-MOB1 complex. This cascade further phosphorylates and inactivates the YAP1 oncoprotein and WWTR1/TAZ, regulating genes essential for cell proliferation, death, and migration. MST2 and MST1 are vital for repressing hepatocyte proliferation, preventing activation of facultative adult liver stem cells, and inhibiting tumor formation. Beyond the Hippo pathway, MST2 phosphorylates NKX2-1, NEK2, CROCC, CEP250, MOBKL1A, MOBKL1B, and RASSF2, exerting influence on centrosome disjunction, RAF1 activation, ESR1 transcriptional activity, and STK38 activation. MST2, working in conjunction with SAV1, positively regulates RAF1 activation by suppressing inhibitory phosphorylation on 'Ser-259' and collaborates with MOBKL1B to activate STK38.