Predicted to enable GTPase activator activity and protein heterodimerization activity. Acts upstream of or within regulation of transcription, DNA-templated. Located in cytoplasm and nucleus. Is expressed in several structures, including 1st branchial arch; brain; and trunk. Orthologous to human RALGAPA1 (Ral GTPase activating protein catalytic subunit alpha 1). [provided by Alliance of Genome Resources, Apr 2022]