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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Ultraviolet radiation, but not γ radiation or etoposide-induced DNA damage, results in the phosphorylation of the murine p53 protein at serine-389
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Ultraviolet radiation, but not γ radiation or etoposide-induced DNA damage, results in the phosphorylation of the murine p53 protein at serine-389

机译:紫外线辐射,而不是γ辐射或依托泊苷引起的DNA损伤,不会导致鼠p53蛋白在丝氨酸389处的磷酸化

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摘要

Polyclonal antibodies were produced and pu- rified that selectively react with a p53 epitope containing the murine phosphoserine-389 or the human phosphoserine-392 residue, but not the unphosphorylated epitope. These anti- bodies, termed alpha-392, were employed to demonstrate that the phosphorylation of this serine-389 residue in the p53 protein occurs in vivo in response to ultraviolet radiation of cells containing the p53 protein. After ultraviolet radiation of cells in culture, p53 levels increase and concomitantly serine- 389 is phosphorylated in these cells. By contrast, the serine- 389 phosphorylation of the p53 protein was not detected by these antibodies in the increased levels of p53 protein made in response to γ radiation or the treatment of cells with etopo- side.
机译:产生并纯化多克隆抗体,使其与含有鼠磷酸丝氨酸-389或人磷酸丝氨酸-392残基的p53表位选择性反应,但不与未磷酸化的表位反应。这些被称为α-392的抗体被用来证明p53蛋白中此丝氨酸389残基的磷酸化反应是在体内响应包含p53蛋白的细胞的紫外线辐射而发生的。在培养细胞受到紫外线照射后,p53水平升高,并且在这些细胞中伴随着丝氨酸389的磷酸化。相比之下,这些抗体未检测到p53蛋白的丝氨酸389磷酸化,这是由于响应γ辐射或用依托泊苷处理细胞而使p53蛋白水平升高。

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