Protein kinase involved in the regulation of actin cytoskeleton organization and endocytosis (PubMed:9885245, PubMed:10087264, PubMed:11694597, PubMed:11739778). Phosphorylates PAN1 which disrupts the interaction between PAN1 and END3, and between PAN1 and SLA1 (PubMed:9885245, PubMed:11739778, PubMed:13679512). Phosphorylates SCD5 (PubMed:12956961, PubMed:13679512). Preferentially, phosphorylates substrates on threonine residues in a [L/I/V/M]-x-x-[Q/N/T/S]-x-T-G motif (PubMed:9885245, PubMed:11739778, PubMed:12956961, PubMed:13679512). ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Interacts with ABP1, which is required for proper actin patch localization. Cortical actin patches. Viable (PubMed:9885245). At the restrictive temperature of 37 degrees Celsius, loss of asymmetric localization of cortical actin patches and, delay in emergence and bud growth resulting in the accumulation of unbudded cells (PubMed:9885245). Present with 1323 molecules/cell in log phase SD medium. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.