USP2 Antibody – Rabbit Polyclonal

This gene encodes a member of the family of de-ubiquitinating enzymes, which belongs to the peptidase C19 superfamily. The encoded protein is a ubiquitin-specific protease which is required for TNF-alpha (tumor necrosis factor alpha) -induced NF-kB (nuclear factor kB) signaling. This protein deubiquitinates polyubiquitinated target proteins such as fatty acid synthase, murine double minute 2 (MDM2), MDM4/MDMX and cyclin D1. MDM2 and MDM4 are negative regulators of the p53 tumor suppressor and cyclin D1 is required for cell cycle G1/S transition. Multiple alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Aug 2011]

USP2: Hydrolase that deubiquitinates polyubiquitinated target proteins such as MDM2, MDM4 and CCND1. Isoform 1 and isoform 4 possess both ubiquitin-specific peptidase and isopeptidase activities. Deubiquitinates MDM2 without reversing MDM2-mediated p53/TP53 ubiquitination and thus indirectly promotes p53/TP53 degradation and limits p53 activity. Has no deubiquitinase activity against p53/TP53. Prevents MDM2-mediated degradation of MDM4. Plays a role in the G1/S cell-cycle progression in normal and cancer cells. Plays a role in the regulation of myogenic differentiation of embryonic muscle cells. Homooligomer. Found in trimeric complex with MDM2 and MDM4 and UPB2. Interacts with CCND1; the interaction is direct and promotes its stabilization by antagonizing ubiquitin-dependent degradation. Interacts (via N-terminus and C- terminus) with MDM2. Interacts with MDM4. Down-regulated by cisplatin. Expressed in mesangial cells of the kidney and in different types of glomerulonephritides. Cleavage is inhibited by ubiquitin in a dosage- dependent manner. Cleavage is blocked by ubiquitin aldehyde. Belongs to the peptidase C19 family. USP2 subfamily. 4 isoforms of the human protein are produced by alternative splicing.

Protein type: Ubiquitin-specific protease; EC 3.4.19.12; Protease

Chromosomal Location of Human Ortholog: 11q23.3

Cellular Component: centrosome; perinuclear region of cytoplasm; cytoplasm; cell cortex; nucleus

Molecular Function: identical protein binding; cyclin binding; protein binding; cysteine-type endopeptidase activity; ubiquitin protein ligase binding; metal ion binding; ubiquitin-specific protease activity

Biological Process: proteasomal ubiquitin-dependent protein catabolic process; negative regulation of skeletal muscle development; locomotor rhythm; muscle development; protein deubiquitination; protein stabilization; negative regulation of transcription from RNA polymerase II promoter; circadian regulation of gene expression; positive regulation of skeletal muscle development; cell cycle; positive regulation of mitotic cell cycle; circadian behavior; entrainment of circadian clock by photoperiod