mTOR binds to the promoters of RNA polymerase I- and III-transcribed genes.

mTOR binds to the promoters of RNA polymerase I- and III-transcribed genes.
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DOI:
10.4161/cc.9.5.10876
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发表时间:
2010-03-01
期刊:
Cell cycle (Georgetown, Tex.)
影响因子:
--
通讯作者:
Zheng XF
Zheng XF
中科院分区:
其他
文献类型:
--
作者:
Tsang CK;Liu H;Zheng XF

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雷帕霉素靶蛋白(TOR)是一种从酵母到人类基因表达的保守调节因子。在芽殖酵母中,TOR与核糖体DNA(rDNA)启动子相关,其对于核糖体生物合成和转运RNA(tRNA)合成至关重要。mTOR在哺乳动物细胞中的行为是否相似尚不清楚。在这里,我们报告说,在人类和小鼠细胞,包括rDNA和tRNA基因的几个不同的启动子检测mTOR。mTOR与这些启动子的结合受生长信号调节,并且对雷帕霉素敏感。总之,我们的观察表明,mTOR密切参与启动子的基因调控,这是一种保守的机制,控制RNA聚合酶I和III依赖的基因,这些基因对蛋白质合成和细胞生长至关重要。
Target of rapamycin (TOR) is a conserved regulator of gene expression from yeast to humans. In budding yeast, TOR is associated with ribosomal DNA (rDNA) promoter, which is critical for ribosome biogenesis and transfer RNA (tRNA) synthesis. Whether mTOR behaves similarly in mammalian cells is unknown. Here, we report that mTOR is detected at several different promoters in human and murine cells, including that of rDNA and tRNA genes. The association of mTOR with these promoters is regulated by growth signals and sensitive to rapamycin. Together, our observations suggest that mTOR is closely involved in gene regulation at the promoters, which is a conserved mechanism to control RNA polymerase I- and III-dependent genes that are critical for protein synthesis and cell growth.
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期刊: NATURE
影响因子: 64.8
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