Disease:Defects in FAS are the cause of autoimmune lymphoproliferative syndrome type 1A (ALPS1A) [MIM:601859]; also known as Canale-Smith syndrome (CSS) . ALPS is a childhood syndrome involving hemolytic anemia and thrombocytopenia with massive lymphadenopathy and splenomegaly. ,Domain:Contains a death domain involved in the binding of FADD , and maybe to other cytosolic adapter proteins. ,Function:Receptor for TNFSF6/FASLG. The adapter molecule FADD recruits caspase-8 to the activated receptor. The resulting death-inducing signaling complex (DISC) performs caspase-8 proteolytic activation which initiates the subsequent cascade of caspases (aspartate-specific cysteine proteases) mediating apoptosis. FAS-mediated apoptosis may have a role in the induction of peripheral tolerance , in the antigen-stimulated suicide of mature T-cells , or both. The secreted isoforms 2 to 6 block apoptosis (in vitro) . ,online information:Mutations in TNFRSF6 causing ALPS type Ia ,similarity:Contains 1 death domain. ,similarity:Contains 3 TNFR-Cys repeats. ,subunit:Binds DAXX. Interacts with HIPK3. Part of a complex containing HIPK3 and FADD (By similarity) . Binds RIPK1 and FAIM2. Interacts with BRE and FEM1B. ,tissue specificity:Isoform 1 and isoform 6 are expressed at equal levels in resting peripheral blood mononuclear cells. After activation there is an increase in isoform 1 and decrease in the levels of isoform 6. ,
展开内容