Calcium- and diacylglycerol-independent serine/ threonine-protein kinase that plays a general protective role against apoptotic stimuli, is involved in NF-kappa-B activation, cell survival, differentiation and polarity, and contributes to the regulation of microtubule dynamics in the early secretory pathway (By similarity). Is required for the formation and maintenance of the zonula adherens during early epithelial development and plays a critical role in organ morphogenesis and in regulating the orientation of cell division. ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Exhibits an elevated basal enzymatic activity and is not regulated by diacylglycerol, phosphatidylserine, phorbol esters or calcium ions. Two specific sites, Thr-404 (activation loop of the kinase domain) and Thr-556 (turn motif), need to be phosphorylated for its full activation (By similarity). The C1 zinc finger does not bind the diacylglycerol (DAG). Belongs to the protein kinase superfamily. AGC Ser/Thr protein kinase family. PKC subfamily. It is uncertain whether Met-1 or Met-9 is the initiator.