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. This gene encodes a member of the E2 ubiquitin-conjugating enzyme family. This enzyme is closely related to a stimulator of iron transport (SFT), and is up-regulated in hereditary hemochromatosis. It also functions in the ubiquitination of the tumor-suppressor protein p53 and the hypoxia-inducible transcription factor HIF1alpha by interacting with the E1 ubiquitin-activating enzyme and the E3 ubiquitin-protein ligases.
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(E3-independent) E2 ubiquitin-conjugating enzyme D1; E2 ubiquitin-conjugating enzyme D1; E2(17)KB 1; E2(17)KB1; SFT; Stimulator of Fe transport; UBC4/5; UBC4/5 homolog; UBCH5; UBCH5A; ubiquitin; Ubiquitin carrier protein D1; ubiquitin conjugating enzyme E2D 1; Ubiquitin-conjugating enzyme E2 D1; Ubiquitin-conjugating enzyme E2(17)KB 1; Ubiquitin-conjugating enzyme E2-17 kDa 1; ubiquitin-conjugating enzyme E2D 1 (UBC4/5 homolog; ubiquitin-conjugating enzyme E2D 1 (UBC4/5 homolog, yeast); ubiquitin-conjugating enzyme E2D 1, UBC4/5 homolog; Ubiquitin-protein ligase D1; yeast)