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|Title:||Type II phosphatidylinositol 4-kinase beta associates with TCR-CD3 zeta chain in Jurkat cells|
|Publisher:||PERGAMON-ELSEVIER SCIENCE LTD|
|Citation:||MOLECULAR IMMUNOLOGY, 43(5), 454-463|
|Abstract:||Phosphatidylinositol lipid signaling cascades are integral part of TCR-CD3 signaling. The mechanisms by which phosphatidylinositol kinases are coupled to TCR-CD3 complex remain elusive. Here we report an association of type II PtdIns 4-kinase with TCR-CD3 zeta chain upon cross-linking. Mapping studies have revealed that the C-terminal ITAM is critical for docking of the enzyme on the zeta chain. The association is shown to be tyrosyl phosphorylation dependent as mutation of Y-151 and Y-142 on the C-terminal ITAM disrupts interaction of the two proteins. Identification of the associated type II PtdIns 4-kinase revealed that the beta isoform of the enzyme interacts with the zeta chain in vivo. (c) 2005|
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