Serine/threonine protein kinase that plays a role in viral propagation by phosphorylating various viral and cellular substrates including the viral p6.9 protein or host histone H1. Participates in nucleocapsid assembly and polyhedra formation. ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Expressed during the beginning of the late and throughout the very late phases of AcMNPV infection. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.