Predicted to enable guanyl-nucleotide exchange factor activity; identical protein binding activity; and kinase binding activity. Predicted to be involved in exocytosis. Predicted to act upstream of or within protein transport. Predicted to be active in Golgi to plasma membrane transport vesicle. Is expressed in embryo. Orthologous to human RAB3IL1 (RAB3A interacting protein like 1). [provided by Alliance of Genome Resources, Apr 2022]