Serine/threonine protein kinase that probably participates as an intermediate in an intracellular system controlling nuclear proliferation. ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Mainly expressed during the vegetative growth, the level decreased when the mycelium can differentiate and form sporangiophores. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.