Cell. 1992 Nov 13;71(4):649-62.

ZAP-70: a 70 kd protein-tyrosine kinase that associates with the TCR zeta chain.

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Division of Rheumatology, University of California, San Francisco 94143.

Abstract

Protein-tyrosine kinases (PTKs) play an integral role in T cell activation. Stimulation of the T cell antigen receptor (TCR) results in tyrosine phosphorylation of a number of cellular substrates. One of these is the TCR zeta chain, which can mediate the transduction of extracellular stimuli into cellular effector functions. We have recently identified a 70 kd tyrosine phosphoprotein (ZAP-70) that associates with zeta and undergoes tyrosine phosphorylation following TCR stimulation. Here we report the isolation of a cDNA clone encoding ZAP-70. ZAP-70 represents a novel PTK and is expressed in T and natural killer cells. Moreover, tyrosine phosphorylation and association of ZAP-70 with zeta require the presence of src family PTKs and provide a potential mechanism by which the src family PTKs and ZAP-70 may interact to mediate TCR signal transduction.

PMID:: 1423621; [PubMed - indexed for MEDLINE]

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AR20684/AR/NIAMS NIH HHS/United States

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ZAP-70: a 70 kd protein-tyrosine kinase that associates with the TCR zeta chain.
ZAP-70: a 70 kd protein-tyrosine kinase that associates with the TCR zeta chain.
Cell. 1992 Nov 13 ;71(4):649-62.

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