E3/Ubiquitin Protein Ligase (E3/UBPL) ELISA Kit for Human

This gene encodes a progestin-induced protein, which belongs to the HECT (homology to E6-AP carboxyl terminus) family. The HECT family proteins function as E3 ubiquitin-protein ligases, targeting specific proteins for ubiquitin-mediated proteolysis. This gene is localized to chromosome 8q22 which is disrupted in a variety of cancers. This gene potentially has a role in regulation of cell proliferation or differentiation. [provided by RefSeq, Jul 2008]

UBR5: E3 ubiquitin-protein ligase which is a component of the N-end rule pathway. Recognizes and binds to proteins bearing specific N-terminal residues that are destabilizing according to the N-end rule, leading to their ubiquitination and subsequent degradation. Involved in maturation and/or transcriptional regulation of mRNA by activating CDK9 by polyubiquitination. May play a role in control of cell cycle progression. May have tumor suppressor function. Regulates DNA topoisomerase II binding protein (TopBP1) in the DNA damage response. Plays an essential role in extraembryonic development. Ubiquitinates acetylated PCK1. Binds TOPBP1. Associates with CDK9 and TFIIS/TCEA1 and forms a transcription regulatory complex made of CDK9, RNAP II, UBR5 and TFIIS/TCEA1 that can stimulates target gene transcription (e.g. gamma fibrinogen/FGG) by recruiting their promoters. Associates with the E3 ligase complex containing DYRK2, EDD/UBR5, DDB1 and VPRBP proteins (EDVP complex). Interacts directly with DYRK2. Widely expressed. Most abundant in testis and expressed at high levels in brain, pituitary and kidney.

Protein type: EC 6.3.2.-; EC 6.3.2.19; Ligase; Ubiquitin conjugating system; Nuclear receptor co-regulator; Ubiquitin ligase

Chromosomal Location of Human Ortholog: 8q22

Cellular Component: nucleoplasm; membrane; cytoplasm; nucleus

Molecular Function: ubiquitin binding; protein binding; zinc ion binding; RNA binding; ubiquitin-protein ligase activity; ligase activity

Biological Process: ubiquitin-dependent protein catabolic process; cell proliferation; protein polyubiquitination; progesterone receptor signaling pathway; positive regulation of protein import into nucleus, translocation; protein ubiquitination during ubiquitin-dependent protein catabolic process; DNA repair; response to DNA damage stimulus