Catalytic activity:ATP + a protein = ADP + a phosphoprotein. ,cofactor:Magnesium. ,cofactor:Manganese. ,enzyme regulation:Autophosphorylates on tyrosine residues. ,Function:Role in the regulation of cellular growth and/or development. Regulates TP53 by phosphorylation on Ser-46 to induce apoptosis in response to DNA damage , functioning downstream of ATM. Inactivates GYS1 by phosphorylation at Ser-641 , and potentially also a second phosphorylation site , thus regulating glycogen synthesis. Phosphorylates EIF2B5 at Ser-544 , enabling its subsequent phosphorylation and inhibition by GSK3 , and may play a more general role in the priming of GSK3 substrates. ,PTM:Phosphorylated on serine/threonine residues. ,similarity:Belongs to the protein kinase superfamily. CMGC Ser/Thr protein kinase family. MNB/DYRK subfamily. ,similarity:Contains 1 protein kinase domain. ,subcellular location:Translocates into the nucleus following DNA damage. ,tissue specificity:Testis , after the onset of spermatogenesis. ,
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