Anti-PTPN22 Antibody Picoband®

Protein tyrosine phosphatase, non-receptor type 22 (lymphoid), also known as PTPN22, is a protein that in humans is encoded by the PTPN22 gene. It is mapped to 1p13.2. This gene encodes of member of the non-receptor class 4 subfamily of the protein-tyrosine phosphatase family. The encoded protein is a lymphoid-specific intracellular phosphatase that associates with the molecular adapter protein CBL and may be involved in regulating CBL function in the T-cell receptor signaling pathway. Mutations in this gene may be associated with a range of autoimmune disorders including Type 1 Diabetes, rheumatoid arthritis, systemic lupus erythematosus and Graves' disease. Alternatively spliced transcript variants encoding distinct isoforms have been described.

Tyrosine-protein phosphatase non-receptor type 22; Hematopoietic cell protein-tyrosine phosphatase 70Z-PEP; Lymphoid phosphatase; LyP; PEST-domain phosphatase; PEP; PTPN22; PTPN8

Acts as negative regulator of T-cell receptor (TCR) signaling by dephosphorylation of the Src family kinases LCK and FYN, ITAMs of the TCRz/CD3 complex, as well as ZAP70, VAV, VCP and other key signaling molecules. Associates with and probably dephosphorylates CBL. Dephosphorylates LCK at its activating 'Tyr-394' residue. Dephosphorylates ZAP70 at its activating 'Tyr-493' residue. Dephosphorylates the immune system activator SKAP2. Positively regulates toll-like receptor (TLR) -induced type 1 interferon production. Promotes host antiviral responses mediated by type 1 interferon. Regulates NOD2-induced pro-inflammatory cytokine secretion and autophagy.

1. Kallberg, H., Padyukov, L., Plenge, R. M., Ronnelid, J., Gregersen, P. K., van der Helm-van Mil, A. H. M., Toes, R. E. M., Huizinga, T. W., Klareskog, L., Alfredsson, L. Gene-gene and gene-environment interactions involving HLA-DRB1, PTPN22, and smoking in two subsets of rheumatoid arthritis. Am. J. Hum. Genet. 80: 867-875, 2007. 2. Kawasaki, E., Awata, T., Ikegami, H., Kobayashi, T., Maruyama, T., Nakanishi, K., Shimada, A., Uga, M., Kurihara, S., Kawabata, Y., Tanaka, S., Kanazawa, Y., Lee, I., Eguchi, K., Japanese Study Group on Type 1 Diabetes Genetics. Systematic search for single nucleotide polymorphisms in a lymphoid tyrosine phosphatase gene (PTPN22) : association between a promoter polymorphism and type 1 diabetes in Asian populations. Am. J. Med. Genet. 140A: 586-593, 2006. Note: Erratum: Am. J. Med. Genet. 143A: 1812-1813, 2007. 3. Kyogoku, C., Langefeld, C. D., Ortmann, W. A., Lee, A., Selby, S., Carlton, V. E. H., Chang, M., Ramos, P., Baechler, E. C., Batliwalla, F. M., Novitzke, J., Williams, A. H., and 10 others. Genetic association of the R620W polymorphism of protein tyrosine phosphatase PTPN22 with human SLE. Am. J. Hum. Genet. 75: 504-507, 2004.

At -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freezing and thawing.