Ubiquitin Conjugating Enzyme E2I (UBE2I)

The modification of proteins with ubiquitin is an important cellular mechanism for targeting abnormal or short-lived proteins for degradation. Ubiquitination involves at least three classes of enzymes: ubiquitin-activating enzymes, or E1s, ubiquitin-conjugating enzymes, or E2s, and ubiquitin-protein ligases, or E3s.

UBE2I encodes a member of the E2 ubiquitin-conjugating enzyme family. Four alternatively spliced transcript variants encoding the same protein have been found for this gene.The protein has a predicted sequence of 158 amino acids and can support the growth of yeast ubc9 temperature-sensitive mutants at non-permissive temperatures, indicating that their gene is a functional homolog of yeast ubc9.