NCIt definition : Human JAK3 wild-type allele is located in the vicinity of 19p13.1 and is approximately
22 kb in length. This allele, which encodes tyrosine-protein kinase JAK3 protein,
plays a role in signal transduction in the interleukin-2 and interleukin-4 signaling
pathways. Mutations in the JAK3 gene which abolish the tyrosine-protein kinase activity
of its protein product cause autosomal severe combined immunodeficiency disease.;
NCIt note : The JAK3 gene is expressed primarily in immune cells. Interleukin receptors activate
tyrosine-protein kinase JAK3 protein via tyrosine phosphorylation.;