FEATURES

FAMILY

DESCRIPTION

Also known as PTN22_HUMAN, PTPN22, PTPN8. Acts as negative regulator of T-cell receptor (TCR) signaling by direct 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 (PubMed:16461343, PubMed:18056643). Associates with and probably dephosphorylates CBL. Dephosphorylates LCK at its activating 'Tyr-394' residue (PubMed:21719704). Dephosphorylates ZAP70 at its activating 'Tyr-493' residue (PubMed:16461343). Dephosphorylates the immune system activator SKAP2 (PubMed:21719704). Positively regulates toll-like receptor (TLR)-induced type 1 interferon production (PubMed:23871208). Promotes host antiviral responses mediated by type 1 interferon (By similarity). Regulates NOD2-induced pro-inflammatory cytokine secretion and autophagy (PubMed:23991106). Dephosphorylates phospho-anandamide (p-AEA), an endocannabinoid to anandamide (also called N-arachidonoylethanolamide) (By similarity). Interacts with CSK (PubMed:15208781). Interacts with LPXN (By similarity). Interacts with CBL (PubMed:10068674). Interacts with TRAF3 (via MATH domain); the interaction promotes TRAF3 polyubiquitination (PubMed:23871208).

EXTERNAL LINKS

PTPN22

Mutations

Mutation(s) distribution

Mutations table