Enables GTPase activator activity. Acts upstream of or within neuron migration and regulation of neuron projection development. Located in growth cone. Is expressed in several structures, including adipose tissue; brain; genitourinary system; liver; and spleen. Orthologous to human ACAP3 (ArfGAP with coiled-coil, ankyrin repeat and PH domains 3). [provided by Alliance of Genome Resources, Apr 2022]