ARP26191-63 [Polyclonal Antibody]
PTPN22 Rabbit Polyclonal Antibody
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Species:   Rabbit
Applications:   WB IHC
Immunogen Range:   A recombinant protein of human PTPN22
Clonality:   Polyclonal Antibody
Isotype:   IgG
GENE ID:   26191
Swiss Prot:   Q9Y2R2
Synonyms:   LYP, LYP1, LYP2, PEP, PTPN8, PTPN22
Purification:   Affinity purification
Storage:   Store at -20°C or -80°C in PBS with 0.02% sodium azide and 50% glycerol. Avoid freeze/thaw cycles.
Background:   PTPN22 (Lyp/PEP) is a cytoplasmic phosphatase expressed by hematopoietic cells (1,2). PTPN22 associates with the tyrosine kinase Csk to inhibit T cell receptor signaling through inactivation of Src kinases (3,4). Csk phosphorylates Src kinases on an inhibitory tyrosine, while PTPN22 dephosphorylates an activating site (4). PTPN22(-/-) mice have higher levels of activated Lck than wild-type, resulting in greater T cell expansion and increased serum antibody levels (5). Research studies have shown that a single-nucleotide polymorphism, 1858T of the PTPN22 gene which encodes the amino acid substitution R620W, confers increased risk for multiple autoimmune diseases including type I diabetes, rheumatoid arthritis, systemic lupus erythematosus, and Graves disease (6-9). Interestingly, although the R620W substitution disrupts the interaction between Csk and PTPN22, it is actually a gain-of-function mutation resulting in increased phosphatase activity (6,10,11). Recent evidence suggests that the autoimmune phenotype associated with the R620W variant is the result of increased calpain-mediated degradation and decreased protein levels of PTPN22 (12).
Caculated MW:   92 kDa
Observed MW:   Refer to Figures
Applications:   WB 1:500-1:2000
IHC 1:50-1:200
Reacitivity:   Human, Mouse, Rat
For research use only. Not intended for diagnostic or therapeutic use!
Additional information