Enables protein kinase A catalytic subunit binding activity and protein serine/threonine kinase activity. Involved in several processes, including negative regulation of dendrite development; positive regulation of neuron apoptotic process; and protein phosphorylation. Located in cytoplasm and microtubule. Biomarker of Parkinsonism. Human ortholog(s) of this gene implicated in amyotrophic lateral sclerosis. Orthologous to human GSK3A (glycogen synthase kinase 3 alpha). [provided by Alliance of Genome Resources, Apr 2022]