Ubch5a (UB2D1) Recombinant Protein

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. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2011]

UBE2D1: Accepts ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins. In vitro catalyzes 'Lys- 48'-linked polyubiquitination. Mediates the selective degradation of short-lived and abnormal proteins. Functions in the E6/E6-AP- induced ubiquitination of p53/TP53. Mediates ubiquitination of PEX5 and auto-ubiquitination of STUB1, TRAF6 and TRIM63/MURF1. Ubiquitinates STUB1-associated HSP90AB1 in vitro. Lacks inherent specificity for any particular lysine residue of ubiquitin. Essential for viral activation of IRF3. Mediates polyubiquitination of CYP3A4. Belongs to the ubiquitin-conjugating enzyme family.

Protein type: Ubiquitin conjugating system; EC 6.3.2.19; Ligase; Ubiquitin ligase

Chromosomal Location of Human Ortholog: 10q21.1

Cellular Component: nucleoplasm; protein complex; cytoplasm; cytosol; ubiquitin ligase complex

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

Biological Process: positive regulation of ubiquitin-protein ligase activity during mitotic cell cycle; ubiquitin-dependent protein catabolic process; transcription initiation from RNA polymerase II promoter; negative regulation of ubiquitin-protein ligase activity during mitotic cell cycle; protein polyubiquitination; transcription, DNA-dependent; MyD88-independent toll-like receptor signaling pathway; toll-like receptor 3 signaling pathway; negative regulation of transcription from RNA polymerase II promoter; BMP signaling pathway; regulation of ubiquitin-protein ligase activity during mitotic cell cycle; anaphase-promoting complex-dependent proteasomal ubiquitin-dependent protein catabolic process; positive regulation of protein ubiquitination; transforming growth factor beta receptor signaling pathway; mitotic cell cycle spindle assembly checkpoint; toll-like receptor signaling pathway; innate immune response; gene expression; mitotic cell cycle; toll-like receptor 4 signaling pathway