UBE2D3

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 functions in the ubiquitination of the tumor-suppressor protein p53, which is induced by an E3 ubiquitin-protein ligase. [provided by RefSeq, Jan 2017]

Ubiquitin Conjugating Enzyme E2 D3

Accepts ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins. In vitro catalyzes 'Lys-11'-, as well as 'Lys-48'-linked polyubiquitination. Cooperates with the E2 CDC34 and the SCF(FBXW11) E3 ligase complex for the polyubiquitination of NFKBIA leading to its subsequent proteasomal degradation. Acts as an initiator E2, priming the phosphorylated NFKBIA target at positions 'Lys-21' and/or 'Lys-22' with a monoubiquitin. Ubiquitin chain elongation is then performed by CDC34, building ubiquitin chains from the UBE2D3-primed NFKBIA-linked ubiquitin. Acts also as an initiator E2, in conjunction with RNF8, for the priming of PCNA. Monoubiquitination of PCNA, and its subsequent polyubiquitination, are essential events in the operation of the DNA damage tolerance (DDT) pathway that is activated after DNA damage caused by UV or chemical agents during S-phase. Associates with the BRCA1/BARD1 E3 ligase complex to perform ubiquitination at DNA damage sites following ionizing radiation leading to DNA repair. Targets DAPK3 for ubiquitination which influences promyelocytic leukemia protein nuclear body (PML-NB) formation in the nucleus. In conjunction with the MDM2 and TOPORS E3 ligases, functions ubiquitination of p53/TP53. Supports NRDP1-mediated ubiquitination and degradation of ERBB3 and of BRUCE which triggers apoptosis. In conjunction with the CBL E3 ligase, targets EGFR for polyubiquitination at the plasma membrane as well as during its internalization and transport on endosomes. In conjunction with the STUB1 E3 quality control E3 ligase, ubiquitinates unfolded proteins to catalyze their immediate destruction. Together with RNF135, catalyzes the viral RNA-dependent 'Lys-63'-linked polyubiquitination of RIGI to activate the downstream signaling pathway that leads to interferon beta production (PubMed:28469175).

Biological Process apoptotic process Source:UniProtKB-KW
Biological Process DNA repair Source:UniProtKB-KW
Biological Process negative regulation of BMP signaling pathway Source:Reactome
Biological Process negative regulation of transcription by RNA polymerase II Source:Reactome
Biological Process positive regulation of protein targeting to mitochondrion Source:ParkinsonsUK-UCL1 Publication
Biological Process proteasome-mediated ubiquitin-dependent protein catabolic process Source:UniProtKB1 Publication
Biological Process protein autoubiquitination Source:ParkinsonsUK-UCL1 Publication
Biological Process protein K11-linked ubiquitination Source:UniProtKB1 Publication
Biological Process protein K48-linked ubiquitination Source:UniProtKB1 Publication
Biological Process protein modification process Source:ProtInc1 Publication
Biological Process protein monoubiquitination Source:UniProtKB1 Publication
Biological Process protein polyubiquitination Source:UniProtKB2 Publications
Biological Process protein ubiquitination Source:UniProtKB1 Publication

Cell membrane
Endosome membrane