Predicted to enable adenyl-nucleotide exchange factor activity and identical protein binding activity. Predicted to act upstream of or within protein transport. Located in endoplasmic reticulum. Is expressed in brain; chondrocranium; eye; pancreas; and testis. Human ortholog(s) of this gene implicated in primary cerebellar degeneration. Orthologous to human SIL1 (SIL1 nucleotide exchange factor). [provided by Alliance of Genome Resources, Apr 2022]