Interaction of IL-2R beta and gamma c chains with Jak1 and Jak3: implications for XSCID and XCID.
Interleukin-2 (IL-2) signaling requires the dimerization of the IL-2 receptor beta.(IL-2R beta) and common gamma (gamma c) chains. Mutations of gamma c can result in X-linked severe combined immunodeficiency (XSCID). IL-2, IL-4, IL-7 (whose receptors are known to contain gamma c), and IL-9 (whose receptor is shown here to contain ... gamma c) induced the tyrosine phosphorylation and activation of the Janus family tyrosine kinases Jak1 and Jak3. Jak1 and Jak3 associated with IL-2R beta and gamma c, respectively; IL-2 induced Jak3-IL-2R beta and increased Jak3-gamma c associations. Truncations of gamma c, and a gamma c, point mutation causing moderate X-linked combined immunodeficiency (XCID), decreased gamma c-Jak3 association. Thus, gamma c mutations in at least some XSCID and XCID patients prevent normal Jak3 activation, suggesting that mutations of Jak3 may result in an XSCID-like phenotype.
Mesh Terms:
Animals, Cell Line, Enzyme Activation, Humans, Interleukin-2, Janus Kinase 1, Janus Kinase 3, Mutation, Phosphorylation, Point Mutation, Protein-Tyrosine Kinases, Receptors, Interleukin-2, Severe Combined Immunodeficiency, Transfection, Tyrosine
Animals, Cell Line, Enzyme Activation, Humans, Interleukin-2, Janus Kinase 1, Janus Kinase 3, Mutation, Phosphorylation, Point Mutation, Protein-Tyrosine Kinases, Receptors, Interleukin-2, Severe Combined Immunodeficiency, Transfection, Tyrosine
Science
Date: Nov. 11, 1994
PubMed ID: 7973658
View in: Pubmed Google Scholar
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