Is predicted to encode a protein with the following domains: Potentiating neddylation domain; UBA-like domain; Defective-in-cullin neddylation protein; Cullin binding; and UBA-like superfamily. Is an ortholog of C. elegans dcn-1. In C. elegans, dcn-1 is involved in microtubule cytoskeleton organization; protein catabolic process; and protein neddylation.