STK3 Antibody – Mouse Monoclonal

Protein kinase activation is a frequent response of cells to treatment with growth factors, chemicals, heat shock, or apoptosis-inducing agents. This protein kinase activation presumably allows cells to resist unfavorable environmental conditions. The yeast 'sterile 20' (Ste20) kinase acts upstream of the mitogen-activated protein kinase (MAPK) cascade that is activated under a variety of stress conditions. MST2 was identified as a kinase that is activated by the proapoptotic agents straurosporine and FAS ligand (MIM 134638) (Taylor et al., 1996 [PubMed 8816758]; Lee et al., 2001 [PubMed 11278283]).[supplied by OMIM]

MST2: a protein kinase of the STE20 family. Activated by apoptotic signals as well as other stress conditions. Full activation requires both phosphorylation and caspase-mediated cleavage. Following cleavage by caspase-3, undergoes irreversible autophosphorylation. Full-length is mainly unphosphorylated in the rat thymus and cultured cells, whereas caspase-3-cleaved MST2 in apoptotic cells is highly phosphorylated.

Protein type: EC 2.7.11.1; Autophagy; Kinase, protein; Protein kinase, STE; Protein kinase, Ser/Thr (non-receptor); STE group; STE20 family; MST subfamily

Chromosomal Location of Human Ortholog: 8q22.2

Cellular Component: cytoplasm; cytosol; nucleus

Molecular Function: protein dimerization activity; protein serine/threonine kinase activator activity; protein serine/threonine kinase activity; protein binding; magnesium ion binding; ATP binding; protein kinase activity; receptor signaling protein serine/threonine kinase activity

Biological Process: central nervous system development; protein stabilization; positive regulation of protein binding; positive regulation of apoptosis; apoptosis; positive regulation of JNK cascade; signal transduction; negative regulation of organ growth; protein amino acid phosphorylation; negative regulation of cell proliferation; positive regulation of protein kinase B signaling cascade; positive regulation of fat cell differentiation; positive regulation of transcription factor activity; neural tube formation