Is an ortholog of human VAPA (VAMP associated protein A) and VAPB (VAMP associated protein B and C). Exhibits ephrin receptor binding activity and protein domain specific binding activity. Is expressed in the hypodermis\; the intestine\; the muscular system\; the nervous system\; and the reproductive system. Is used to study amyotrophic lateral sclerosis. Human ortholog(s) of this gene are implicated in amyotrophic lateral sclerosis type 8.