Reaction catalyzed by RING-type E3 ubiquitin transferase (2.3.2.27)
S-ubiquinyl-[UbcH13]-L-cysteine
+
[acceptor protein]-L-lysine
=
[UbcH13]-L-cysteine
+
N6-ubiquitinyl-[acceptor protein]-L-lysine
S-ubiquinyl-[UbcH13]-L-cysteine
+
[acceptor protein]-L-lysine
=
[UbcH13]-L-cysteine
+
N6-ubiquitinyl-[acceptor protein]-L-lysine