Anti-GPX3 Antibody Picoband® Biotin Conjugated

The protein encoded by this gene belongs to the glutathione peroxidase family, members of which catalyze the reduction of organic hydroperoxides and hydrogen peroxide (H2O2) by glutathione, and thereby protect cells against oxidative damage. Several isozymes of this gene family exist in vertebrates, which vary in cellular location and substrate specificity. This isozyme is secreted, and is abundantly found in plasma. Downregulation of expression of this gene by promoter hypermethylation has been observed in a wide spectrum of human malignancies, including thyroid cancer, hepatocellular carcinoma and chronic myeloid leukemia. This isozyme is also a selenoprotein, containing the rare amino acid selenocysteine (Sec) at its active site. Sec is encoded by the UGA codon, which normally signals translation termination. The 3' UTRs of selenoprotein mRNAs contain a conserved stem-loop structure, designated the Sec insertion sequence (SECIS) element, that is necessary for the recognition of UGA as a Sec codon, rather than as a stop signal. Alternatively spliced transcript variants have been found for this gene.

A synthetic peptide corresponding to a sequence at the C-terminus of human GPX3. Human GPX3 shares 100% amino acid (aa) sequence identity with both mouse and rat GPX3.

1. Chambers, I., Frampton, J., Goldfarb, P., Affara, N., McBain, W., Harrison, P. R. The structure of the mouse glutathione peroxidase gene: the selenocysteine in the active site is encoded by the 'termination' codon, TGA. EMBO J. 5: 1221-1227, 1986. 2. Chu, F.-F. The human glutathione peroxidase genes GPX2, GPX3, and GPX4 map to chromosomes 14, 5, and 19, respectively. Cytogenet. Cell Genet. 66: 96-98, 1994. 3. Chu, F.-F., Esworthy, R. S., Doroshow, J. H., Doan, K., Liu, X.-F. Expression of glutathione peroxidase in human liver in addition to kidney, heart, lung, and breast in humans and rodents. Blood 79: 3233-3238, 1992.