UBE2N Antibody – Rabbit Polyclonal

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. Studies in mouse suggest that this protein plays a role in DNA postreplication repair. [provided by RefSeq, Jul 2008]

UBE2N: The UBE2V1-UBE2N and UBE2V2-UBE2N heterodimers catalyze the synthesis of non-canonical 'Lys-63'-linked polyubiquitin chains. This type of polyubiquitination does not lead to protein degradation by the proteasome. Mediates transcriptional activation of target genes. Plays a role in the control of progress through the cell cycle and differentiation. Plays a role in the error-free DNA repair pathway and contributes to the survival of cells after DNA damage. Acts together with the E3 ligases, HLTF and SHPRH, in the 'Lys-63'-linked poly-ubiquitination of PCNA upon genotoxic stress, which is required for DNA repair. Appears to act together with E3 ligase RNF5 in the 'Lys-63'-linked polyubiquitination of JKAMP thereby regulating JKAMP function by decreasing its association with components of the proteasome and ERAD. Heterodimer with UBE2V2. Interacts (UBE2V2-UBE2N heterodimer) with the E3 ligase STUB1 (via the U-box domain); the complex has a specific 'Lys-63'-linked polyubiquitination activity. Interacts with RNF8 and RNF168. Interacts with RNF11. Interacts with the E3 ligases, HLTF and SHPRH; the interactions promote the 'Lys-63'-linked polyubiquitination of PCNA upon genotoxic stress and lead to DNA repair. Interacts with ARIH2 (via RING-type 2). Belongs to the ubiquitin-conjugating enzyme family.

Protein type: Ligase; Ubiquitin conjugating system; EC 6.3.2.19; Ubiquitin ligase; DNA repair, damage

Chromosomal Location of Human Ortholog: 12q22

Cellular Component: protein complex; cytoplasm; nucleus; cytosol; ubiquitin ligase complex; UBC13-MMS2 complex

Molecular Function: ubiquitin binding; protein binding; small conjugating protein ligase activity; ubiquitin protein ligase binding; ubiquitin-protein ligase activity; ATP binding; ligase activity

Biological Process: ubiquitin-dependent protein catabolic process; regulation of histone ubiquitination; positive regulation of DNA repair; positive regulation of I-kappaB kinase/NF-kappaB cascade; positive regulation of histone modification; postreplication repair; cytokine and chemokine mediated signaling pathway; DNA double-strand break processing; protein modification process; protein ubiquitination; proteolysis; T cell receptor signaling pathway; double-strand break repair via homologous recombination; activation of NF-kappaB transcription factor; toll-like receptor 10 signaling pathway; toll-like receptor 2 signaling pathway; MyD88-dependent toll-like receptor signaling pathway; regulation of DNA repair; toll-like receptor 5 signaling pathway; positive regulation of ubiquitin-protein ligase activity; histone ubiquitination; toll-like receptor signaling pathway; innate immune response; toll-like receptor 9 signaling pathway; toll-like receptor 4 signaling pathway