E2 Ubiquitin-Conjugating Enzyme

**Semantic type:** Amino Acid, Peptide, or Protein|Enzyme

**Definition:** An aminoacyltransferase that catalyzes the second step in the ubiquitination reaction via the transfer of activated ubiquitin from an E1 ubiquitin-activating enzyme to itself via transthioesterification.

**Synonyms:** - Ubiquitin Carrier Enzyme - Ubiquitin Carrier Protein - Ubiquitin-Conjugating Enzyme - Ubiquitin-Conjugating Enzyme E2