Protein kinase that phosphorylates murine TP53 at Ser-9, and thus induces TP53 repression of BIRC5 promoter. May act as a corepressor of transcription factors (Potential). ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Expressed at moderate levels in lung and white adipose tissues and weakly in brain and liver. Autophosphorylated. Belongs to the protein kinase superfamily. CMGC Ser/Thr protein kinase family. HIPK subfamily.