. "Catalysis of the reaction: ATP + ubiquitin + protein lysine = AMP + diphosphate + protein N-ubiquityllysine." . . "E2" . "E3" . "ubiquitin-protein ligase activity" . "anaphase-promoting complex activity" . "ubiquitin activity" . "ubiquitin conjugating enzyme activity" . "ubiquitin ligase activity" . "ubiquitin protein ligase activity" . "ubiquitin protein-ligase activity" . "ubiquitin-conjugating enzyme activity" . "ubiquitin-ligase activity" . "ubiquitin:protein-lysine N-ligase (AMP-forming) activity" . . . . . . . .