Enables GTPase activator activity. Involved in several processes, including dopamine receptor signaling pathway; regulation of cation transmembrane transport; and response to amphetamine. Located in cytoplasm and nucleus. Biomarker of Parkinsonism. Human ortholog(s) of this gene implicated in bradyopsia. Orthologous to human RGS9 (regulator of G protein signaling 9). [provided by Alliance of Genome Resources, Apr 2022]