Lyn is a Src-family protein tyrosine kinase that is predominantly expressed in hematopoietic cells. It is associated with a number of cell surface receptors including the B cell antigen receptor (BCR) and Fc receptors. Upon their triggering, Lyn phosphorylates subunits of these receptors in a cholesterol-dependent manner, utilizing the plasma membrane lipid raft system. The phosphorylated intracellular domains of the receptors are accessible for cytoplasmic Syk tyrosine kinase, which is activated by Lyn-mediated phosphorylation and which transduces the signal to downstream adaptors. Lyn is abnormally distributed in acute myeloid leukemia cells and seems to be a novel pharmacologic target of this disease.
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Protein Aliases: JTK8; Lck/Yes-related novel protein tyrosine kinase; lyn protein non-receptor kinase; p53Lyn; p56Lyn; Protein tyrosine kinase p56/p53lyn; Tyrosine-protein kinase Lyn; V-yes-1 Yamaguchi sarcoma viral related oncogene homolog; Yamaguchi sarcoma viral (v-yes-1) oncogene homolog
Gene Aliases: AA407514; Hck-2; JTK8; LYN; p53Lyn; p56Lyn