Enables protein kinase binding activity and protein serine/threonine kinase activity. Involved in positive regulation of ion transport; positive regulation of p38MAPK cascade; and protein autophosphorylation. Located in cytoskeleton and cytosol. Is extrinsic component of membrane. Orthologous to human STK39 (serine/threonine kinase 39). [provided by Alliance of Genome Resources, Apr 2022]