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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Cloning of a novel T-cell protein FYB that binds FYN and SH2-domain-containing leukocyte protein 76 and modulates interleukin 2 production
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Cloning of a novel T-cell protein FYB that binds FYN and SH2-domain-containing leukocyte protein 76 and modulates interleukin 2 production

机译:克隆新型T细胞蛋白FYB,该蛋白结合FYN和含SH2结构域的白细胞蛋白76并调节白介素2的产生

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摘要

T cell receptor ζ (TcRξ)/CD3 ligation ini- tiates a signaling cascade that involves src kinases p56 and ζ-associated protein 70, leading to the phosphorylation of substrates such as TcRζ, Vav, SH2-domain-containing leuko- cyte protein 76 (SLP-76), cbl, and p120/130. FYN binding protein (FYB or p120/130) associates with p59, the TcRζ/ CD3 complex, and becomes tyrosine-phosphorylated in re- sponse to receptor ligation. In this study, we report the cDNA cloning of human and murine FYB and show that it is restricted in expression to T cells and myeloid cells and possesses an overall unique hydrophilic sequence with several tyrosine-based motifs, proline-based type I and type II SH3 domain binding motifs, several putative lysine/glutamic acid- rich nuclear localization motifs, and a SH3-like domain.
机译:T细胞受体ζ(TcRξ)/ CD3连接引发涉及src激酶p56和ζ相关蛋白70的信号级联反应,导致底物如TcRζ,Vav,含SH2结构域的白细胞蛋白76磷酸化(SLP-76),cbl和p120 / 130。 FYN结合蛋白(FYB或p120 / 130)与p59(TcRζ/ CD3复合物)结合,并响应受体连接而酪氨酸磷酸化。在这项研究中,我们报告了人类和鼠类FYB的cDNA克隆,并显示它在T细胞和髓样细胞的表达中受到限制,并具有带有几个基于酪氨酸的基序,基于脯氨酸的I型和II型的整体独特的亲水序列。 SH3结构域结合基序,几个假定的赖氨酸/谷氨酸富核定位基序和一个SH3样结构域。

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