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    Cell. 1992 Aug 21;70(4):585-93.

    Genetic evidence for the involvement of the lck tyrosine kinase in signal transduction through the T cell antigen receptor.

    Straus DB, Weiss A.

    Source

    Howard Hughes Medical Institute, Department of Medicine, University of California, San Francisco 94143.

    Abstract

    Signaling through the T cell antigen receptor (TCR) results both in rapid increases in tyrosine phosphorylation on a number of proteins and in the activation of the phosphatidylinositol pathway. It is not clear how stimulation of the TCR leads to these signaling events. Mutants of the Jurkat T cell line have been previously isolated that fail to show increases in calcium following receptor stimulation. Analysis of one of these mutants, JCaM1, which is defective in the induction of tyrosine phosphorylation, revealed a defect in the expression of functional lck tyrosine kinase. The lack of lck activity was caused in part by a splicing defect. Expression of the lck cDNA in JCaM1 restores the ability of the cell to respond to TCR stimulation. These results indicate that lck is required for normal signal transduction through the TCR.

    PMID:
    1505025
    [PubMed - indexed for MEDLINE]

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