Summary

Name STK3
Full Name Serine/threonine-protein kinase 3
Synonyms Mammalian STE20-like protein kinase 2, MST-2, STE20-like kinase MST2, Serine/threonine-protein kinase Krs-1 | KRS1, MST2
Primary ID Q13188
Links - -
Type protein
Relations 52
Function Stress-activated, pro-apoptotic kinase which, following caspase-cleavage, enters the nucleus and induces chromatin condensation followed by internucleosomal DNA fragmentation. 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. Phosphorylates NKX2-1 (By similarity). Phosphorylates NEK2 and plays a role in centrosome disjunction by regulating the localization of NEK2 to centrosome, and its ability to phosphorylate CROCC and CEP250. In conjunction with SAV1, activates the transcriptional activity of ESR1 through the modulation of its phosphorylation. Positively regulates RAF1 activation via suppression of the inhibitory phosphorylation of RAF1 on 'Ser-259'. Phosphorylates MOBKL1A and RASSF2. Phosphorylates MOBKL1B on 'Thr-74'. Acts cooperatively with MOBKL1B to activate STK38.

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Modifications Tables

Relations

Regulator Mechanism target score
+ up-regulates img/direct-activation.png phosphorylation RCC1 0.2
Publications: 2 Organism: Homo Sapiens
+ down-regulates activity img/direct_inhibition.png phosphorylation STK3 0.337
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png phosphorylation PRKCA 0.2
Publications: 2 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation NEK2 0.245
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation LATS2 0.594
Publications: 4 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates img/direct-activation.png phosphorylation LATS1 0.605
Publications: 2 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ down-regulates activity img/direct_inhibition.png phosphorylation PIK3CA 0.2
Publications: 1 Organism: In Vitro
+ down-regulates img/direct_inhibition.png phosphorylation STK3 0.2
Publications: 3 Organism: Homo Sapiens
+ down-regulates img/direct_inhibition.png phosphorylation STK3 0.363
Publications: 3 Organism: Homo Sapiens
+ down-regulates img/direct_inhibition.png phosphorylation STK3 0.274
Publications: 1 Organism: Homo Sapiens
+ down-regulates img/direct_inhibition.png phosphorylation STK3 0.263
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation MOB1B 0.81
Publications: 4 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates img/direct-activation.png phosphorylation MOB1A 0.846
Publications: 5 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates img/direct-activation.png phosphorylation STK3 0.2
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ down-regulates img/direct_inhibition.png dephosphorylation STK3 0.685
Publications: 1 Organism: Homo Sapiens
+ down-regulates activity img/direct_inhibition.png phosphorylation STAT3 0.2
Publications: 1 Organism: In Vitro
+ down-regulates img/direct_inhibition.png phosphorylation ABL1 0.2
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation STK3 0.2
Publications: 1 Organism: Homo Sapiens
+ down-regulates img/direct_inhibition.png binding STK3 0.367
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/indirect-activation.png STK3 0.375
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates quantity by stabilization img/direct-activation.png binding STK3 0.828
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates img/indirect-activation.png STK3 0.8
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation Mob1 0.855
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ down-regulates img/direct_inhibition.png binding STK3 0.649
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation STK3 0.278
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation STK3 0.295
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation STK3 0.302
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation STK3 0.2
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates img/direct-activation.png binding STK3 0.689
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates img/direct-activation.png phosphorylation LATS1/2 0.605
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates img/direct-activation.png phosphorylation SAV1 0.828
Publications: 1 Organism: In Vitro
Pathways:Hippo Signaling
+ up-regulates img/direct-activation.png binding STK3 0.828
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates activity img/direct-activation.png binding STK3 0.689
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling
+ up-regulates activity img/direct-activation.png binding STK3 0.333
Publications: 1 Organism: Mus Musculus
Pathways:Hippo Signaling
+ up-regulates img/indirect-activation.png STK3 0.7
Publications: 1 Organism: Homo Sapiens
Pathways:Hippo Signaling