用酵母双杂交系统筛选ATF5相互作用蛋白

Chinese Journal of Biochemistry and Molecular Biology(2008)

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Abstract
转录激活因子5(activating transcription factor5,ATF5)最初是从人T淋巴细胞中分离出来,并在肿瘤发展中起重要作用.为研究ATF5的作用机理,以其C末端区域为诱饵蛋白,用酵母双杂交技术从人心脏cDNA文库中筛选出了包括热休克蛋白27和核糖体蛋白L18a等与肿瘤转移、预后密切相关的蛋白.免疫共沉淀实验表明,热休克蛋白27能够特异结合在ATF5C末端区域.由此推论,ATF5通过细胞内一些与肿瘤发展、转移及预后有关的蛋白相互作用,进而影响肿瘤的进展,为ATF5的功能研究提供了重要的线索.
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Key words
yeast two-hybrid,protein-protein interaction,tumor,activating transcription factor 5
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