a protein kinase of the MLK family. Mediates signal transduction induced by TGF beta and morphogenetic protein (BMP), and controls a variety of cell functions including transcription regulation and apoptosis. In response to IL-1, forms a kinase complex including TRAF6, MAP3K7P1/TAB1 and MAP3K7P2/TAB2; this complex is required for the activation of nuclear factor kappa B. Also activates MAPK8/JNK, MAP2K4/MKK4, and thus plays a role in the cell response to environmental stresses. Four alternatively spliced isoforms have been reported. Three splice variant isoforms have been described. Note: This description may include information from UniProtKB.
Protein type: Protein kinase, TKL; Protein kinase, Ser/Thr (non-receptor); EC 188.8.131.52; Kinase, protein; TKL group; MLK family; TAK1 subfamily
Molecular Function: MAP kinase kinase activity; protein serine/threonine kinase activity; protein binding; MAP kinase kinase kinase activity; magnesium ion binding; ATP binding; protein kinase activity
Biological Process: I-kappaB kinase/NF-kappaB cascade; positive regulation of JNK activity; activation of MAPKK activity; activation of MAPK activity; apoptosis; stress-activated MAPK cascade; positive regulation of T cell cytokine production; positive regulation of JNK cascade; toll-like receptor 3 signaling pathway; T cell receptor signaling pathway; toll-like receptor 10 signaling pathway; activation of NF-kappaB transcription factor; toll-like receptor 5 signaling pathway; transforming growth factor beta receptor signaling pathway; JNK cascade; angiogenesis; toll-like receptor 4 signaling pathway; positive regulation of I-kappaB kinase/NF-kappaB cascade; transcription, DNA-dependent; MyD88-independent toll-like receptor signaling pathway; activation of NF-kappaB-inducing kinase; toll-like receptor 2 signaling pathway; MyD88-dependent toll-like receptor signaling pathway; toll-like receptor signaling pathway; positive regulation of interleukin-2 production; innate immune response; toll-like receptor 9 signaling pathway; positive regulation of T cell activation; neural tube formation; I-kappaB phosphorylation
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.