Predicted to enable G-protein alpha-subunit binding activity; GTPase activator activity; and guanyl-nucleotide exchange factor activity. Acts upstream of or within several processes, including basement membrane organization; gastrulation; and visual learning. Located in membrane. Is expressed in several structures, including alimentary system; extraembryonic component; genitourinary system; nervous system; and sensory organ. Orthologous to human RIC8A (RIC8 guanine nucleotide exchange factor A). [provided by Alliance of Genome Resources, Apr 2022]