Predicted to enable GTPase activator activity. Predicted to be involved in several processes, including establishment of Golgi localization; maintenance of Golgi location; and organelle transport along microtubule. Predicted to act upstream of or within regulation of endocytosis. Predicted to be located in several cellular components, including Golgi apparatus; actin cytoskeleton; and cell junction. Orthologous to human ARHGAP21 (Rho GTPase activating protein 21). [provided by Alliance of Genome Resources, Apr 2022]