Interacts with pak1/shk1 and coordinates cell morphogenesis with the cell cycle. It is essential for maintenance of cell polarity and is involved in mitotic control. ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Interacts with mob2. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.