Predicted to enable guanyl-nucleotide exchange factor activity. Predicted to be involved in protein transport and regulation of ARF protein signal transduction. Expressed in coelomocyte; intestine; muscle cell; and neurons. Human ortholog(s) of this gene implicated in periventricular nodular heterotopia. Is an ortholog of human ARFGEF2 (ADP ribosylation factor guanine nucleotide exchange factor 2).