Enables MAP kinase activity; protein heterodimerization activity; and protein kinase binding activity. Involved in protein phosphorylation. Acts upstream of or within positive regulation of dendritic spine development. Located in cytoplasm; nucleus; and septin cytoskeleton. Part of protein-containing complex. Is expressed in several structures, including alimentary system; brain; genitourinary system; respiratory system; and sensory organ. Orthologous to human MAPK6 (mitogen-activated protein kinase 6). [provided by Alliance of Genome Resources, Apr 2022]