Enables beta-tubulin binding activity; guanyl-nucleotide exchange factor activity; and small GTPase binding activity. Acts upstream of or within microtubule cytoskeleton organization. Located in cytoplasm and microtubule cytoskeleton. Is expressed in several structures, including adrenal gland; genitourinary system; gut; liver; and nervous system. Orthologous to human RANBP10 (RAN binding protein 10). [provided by Alliance of Genome Resources, Apr 2022]