Predicted to enable GTPase activator activity. Acts upstream of or within dark adaptation and light adaption. Located in several cellular components, including glutamatergic synapse; photoreceptor inner segment; and postsynaptic density membrane. Is expressed in several structures, including central nervous system and retina. 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]