Catalytic activity:ATP + a protein = ADP + a phosphoprotein. ,cofactor:Magnesium. ,enzyme regulation:Activated by phosphorylation on Thr-524. ,Function:Component of a protein kinase signal transduction cascade. Regulates the JNK and ERK5 pathways by phosphorylating and activating MAP2K5 and MAP2K7 (By similarity) . Plays a role in caveolae kiss-and-run dynamics. ,PTM:Autophosphorylated. ,similarity:Belongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. MAP kinase kinase kinase subfamily. ,similarity:Contains 1 OPR domain. ,similarity:Contains 1 protein kinase domain. ,subcellular location:Upon EGF stimulation , translocates into the nucleus. ,subunit:Binds both upstream activators and downstream substrates in multimolecular complexes. ,
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