Serine/threonine protein kinase shown to have protein phosphorylation activity in vitro. ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Interacts with RIM11. Leads to cell death when overexpressing the camptothecin mimetic TOP1-T(722)A mutant. Present with 10200 molecules/cell in log phase SD medium. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.