Reaction catalyzed by N-terminal E2 ubiquitin-conjugating enzyme (2.3.2.25)
S-ubiquitinyl-[N-terminal E2 ubiquitin-conjugating E2 enzyme]-L-cysteine
+
[cIAP2 protein]-N-terminal-amino acid
=
[N-terminal E2 ubiquitin-conjugating enzyme]-L-cysteine
+
N-ubiquitinyl-[ cIAP2 protein]-N-terminal amino acid
S-ubiquitinyl-[N-terminal E2 ubiquitin-conjugating E2 enzyme]-L-cysteine
+
[cIAP2 protein]-N-terminal-amino acid
=
[N-terminal E2 ubiquitin-conjugating enzyme]-L-cysteine
+
N-ubiquitinyl-[ cIAP2 protein]-N-terminal amino acid