Reaction catalyzed by E2 ubiquitin-conjugating enzyme (2.3.2.23)
[ubiquitin-activating protein UBE1]-S-ubiquitinyl-L-cysteine
+
[ubiquitin carrier protein UB2R2]-L-cysteine
=
[ubiquitin-activating protein UBE1]-L-cysteine
+
[ubiquitin carrier protein UB2R2]-S-ubiquitinyl-L-cysteine
[ubiquitin-activating protein UBE1]-S-ubiquitinyl-L-cysteine
+
[ubiquitin carrier protein UB2R2]-L-cysteine
=
[ubiquitin-activating protein UBE1]-L-cysteine
+
[ubiquitin carrier protein UB2R2]-S-ubiquitinyl-L-cysteine