Catalytic activity: ATP + a protein = ADP + a phosphoprotein. Caution: It is uncertain whether Met-1, Met-171 or Met-172 is the initiator. Cofactor: Magnesium. similarity: Belongs to the protein kinase superfamily. AGC Ser/Thr protein kinase family. similarity: Contains 1 AGC-kinase C-terminal domain. similarity: Contains 1 PDZ (DHR) domain. similarity: Contains 1 protein kinase domain. subunit: Interacts with PTEN.