کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2832689 1570743 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
PI3 kinase function is vital for the function but not formation of LAT-mediated signaling complexes
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی مولکولی
پیش نمایش صفحه اول مقاله
PI3 kinase function is vital for the function but not formation of LAT-mediated signaling complexes
چکیده انگلیسی

The induction of the T cell receptor (TCR) is necessary for the activation and function of human T cells. TCR activation results in the tyrosine phosphorylation of LAT, leading to the direct interaction with several proteins, including PLC-γ1, Grb2 and Gads. These direct ligands then mediate the indirect interaction of LAT with proteins, such as SLP-76, Vav1 and Itk. PLC-γ1, Vav1 and Itk contain pleckstrin homology (PH) domains that interact with the enzymatic product of phosphoinositide-3-kinase (PI3K), suggesting the function of PI3K may modulate LAT-mediated complexes. Therefore, we characterized the poorly understood role of PI3K activity in the formation and function of multiprotein signaling complexes that form at LAT. Inhibition of PI3K catalytic function had little effect on the phosphorylation of LAT, SLP-76, Vav1 or PLC-γ1 or on the ability of PLC-γ1 to interact with LAT or SLP-76. However, PI3K activity appeared to be required for the induction of downstream signaling events. These data indicate that the formation of LAT-mediated complexes do not appear to depend on PI3K activity, whereas the optimal downstream function of these complexes requires the catalytic function of PI3K.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Immunology - Volume 46, Issues 11–12, July 2009, Pages 2274–2283
نویسندگان
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