Is predicted to encode a protein with the following domains: UBA-like superfamily; Defective-in-cullin neddylation protein; Cullin binding; UBA-like domain; and Potentiating neddylation domain. 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.