Catalytic activity:ATP + a protein = ADP + a phosphoprotein. ,enzyme regulation:Probably activated by dual phosphorylation on Ser-207 and Thr-211. ,Function:Catalyzes the concomitant phosphorylation of a threonine and a tyrosine residue in MAP kinase p38 exclusively. ,induction:Strongly activated by UV , anisomycin , and osmotic shock but not by phorbol esters , NGF or EGF. ,PTM:Acetylation of Ser-207 and Thr-211 by Yersinia yopJ prevents phosphorylation and activation , thus blocking the MAPK signaling pathway. ,PTM:Weakly autophosphorylated. ,similarity:Belongs to the protein kinase superfamily. ,similarity:Belongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. MAP kinase kinase subfamily. ,similarity:Contains 1 protein kinase domain. ,subunit:Interacts with Yersinia yopJ. ,tissue specificity:Isoform 2 is only expressed in skeletal muscle. Isoform 1 , on the other hand , is found in skeletal muscle , heart , and in lesser extent in liver or pancreas. ,
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