Contributes to the neddylation of all cullins by transferring NEDD8 from N-terminally acetylated NEDD8-conjugating E2s enzyme to different cullin C-terminal domain-RBX complexes and may play a role in the cell cycle progression by regulating the SCF ubiquitin E3 ligase complex, after UV damage. At the cell membrane, can promote and as well inhibit cullins neddylation. {By
SimilarityUniProtKB:Q8IWE4}.