Catalytic activity:ATP + a protein = ADP + a phosphoprotein. ,cofactor:Magnesium. ,developmental stage:Isoform 1 is activated specifically during the S and G2/M phases of the cell cycle. ,Function:Required for TLR4 activation of the MEK/ERK pathway. Able to activate NF-kappa-B 1 by stimulating proteasome-mediated proteolysis of NF-kappa-B 1/p105. Plays a role in the cell cycle. The longer form has some transforming activity , although it is much weaker than the activated cot oncoprotein. ,PTM:Autophosphorylated. Isoform 1 undergoes phosphorylation mainly on Ser residues , and isoform 2 on both Ser and Thr residues. ,similarity:Belongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. MAP kinase kinase kinase subfamily. ,similarity:Contains 1 protein kinase domain. ,subunit:Forms a ternary complex with NFKB1 and TNIP2. ,tissue specificity:Expressed in several normal tissues and human tumor-derived cell lines. ,
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