کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10767806 | 1050799 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Docking protein Gab2 positively regulates glycoprotein VI-mediated platelet activation
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
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چکیده انگلیسی
Gab2, a recently identified docking protein, contains a pleckstrin homology domain and potential binding sites for SH2 and SH3 domain-containing proteins. Gab2 has been shown to support growth, differentiation, and function in a number of haematopoietic cells, although its role in platelets remains to be determined. Here we report that cross-linking of the collagen receptor GPVI by the snake venom toxin convulxin stimulates tyrosine phosphorylation of Gab2. Furthermore, platelet aggregation induced by submaximal concentrations of convulxin is attenuated in the absence of Gab2, although recovery is seen with higher concentrations of the toxin. Consistent with this, tyrosine phosphorylation of Fc receptor γ-chain, Syk, Btk, and phospholipase Cγ2 by convulxin is reduced in the absence of Gab2. In comparison, the G protein-coupled receptor agonist, thrombin, does not induce phosphorylation of Gab2 and aggregation is unaltered in the absence of the toxin. These findings provide evidence for a functional role of Gab2 in supporting platelet activation by GPVI.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 337, Issue 2, 18 November 2005, Pages 446-451
Journal: Biochemical and Biophysical Research Communications - Volume 337, Issue 2, 18 November 2005, Pages 446-451
نویسندگان
Qun Yi, Katsue Suzuki-Inoue, Naoki Asazuma, Osamu Inoue, Steve P. Watson, Yukio Ozaki,