Ubiquitin Carboxyl-terminal Esterase L1 (UCH-L1), also known as PGP9.5, is a deubiquitinating enzyme with a predicted molecular weight of 25 kDa. The human protein shares 95% amino acid sequence identity with its mouse and rat orthologs. UCH-L1 is expressed abundantly in neurons, accounting for 1-2% of total soluble proteins in the brain. It localizes primarily to the cytoplasm, but a subpopulation has been shown to be transiently nuclear. UCH-L1 contains two catalytic residues, Cys90 and His161, which are required for isopeptide bond cleavage at the C-terminal glycine residue of Ubiquitin. The levels of free Ubiquitin appear to be partially regulated by UCH-L1 through the hydrolysis of small Ubiquitin chains and the stabilization of monomeric Ubiquitin. Mice lacking functional UCH-L1 show neuronal dysfunction and neurodegeneration, and mutations in this enzyme have been linked to Parkinson's disease, suggesting that it is important for proper central nervous system function. UCH-L1 also likely plays a complex role in cancer. It has been reported to function as an oncogene in lymphoma, colorectal cancer, and nonsmall cell lung carcinoma. In contrast, it is thought to function as a tumor suppressor protein in nasopharyngeal and breast cancers.
FAQs for UCH-L1/PGP9.5 (DY6007-05). (Showing 1 - 1 of 1 FAQs).
What is the difference between the Quantikine and Duoset ELISA kits?
Our Quantikine kits are fully optimized and validated for the sample types listed on the product specific webpage and datasheet, as this can vary between kits. Each kit is supplied ready to use with one pre-coated 96-well plate, a detection antibody directly conjugated to HRP, and all other necessary reagents. These kits are ideal for researchers who want the convenience of a ready to use and optimized ELISA product. Some of these kits are also available prepackaged in larger 6 and 50 plate sizes.Our DuoSet Kits, in contrast, are ELISA development kits containing the capture and detection antibody, the mass-value calibrated standard, and streptavidin-HRP to prepare approximately 5 or 15 plates. Ancillary reagents will need to be used/purchased, and for most kits, we will recommend one of our Ancillary Reagent Kits, which contain the reagents we use ourselves in-house. DuoSet kits are validated only for cell culture supernatant samples and therefore require further development and validation for accurate measurement in more complex samples such as serum and plasma. Our DuoSet Kits offer an economical, flexible alternative for the experienced ELISA user.