Control of RNA polymerase II-transcribed genes by direct binding of TOR kinase

Control of RNA polymerase II-transcribed genes by direct binding of TOR kinase
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通过直接结合 TOR 激酶来控制 RNA 聚合酶 II 转录基因

DOI:
10.1007/s00294-017-0738-z
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发表时间:
2018
期刊:
影响因子:
2.5
通讯作者:
Grove, Anne
Grove, Anne
中科院分区:
生物学3区
文献类型:
--
作者:
Grove, Anne

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在营养限制和细胞应激的条件下,或通过添加雷帕霉素,雷帕霉素复合物1(mTORC 1)的机制靶点被抑制。这导致编码rRNA和核糖体蛋白的基因下调。虽然大多数mTORC 1的功能,以前已经在机械水平上的特点发生在细胞质中,核的作用也有报道,包括TOR激酶与rRNA基因的直接关联。这篇综述强调了最近的观察,即Saccharomyces leaeTor1p也直接结合到RNA聚合酶II转录的编码Hmo1p的基因上,Hmo1p是一种参与将mTORC 1活性传递到下游靶点的蛋白质。DNA损伤或加入雷帕霉素导致HMO 1mRNA水平降低需要Tor1p,这表明TOR激酶通过直接结合靶基因来控制基因活性。潜在的染色质结合Tor1p的目标进行了讨论,Tor1p同样有助于控制其他基因与核糖体生物合成的可能性被认为是。
Under conditions of nutrient limitation and cellular stress, or by addition of rapamycin, the mechanistic target of rapamycin complex 1 (mTORC1) is inhibited. This results in downregulation of genes that encode rRNA and ribosomal proteins. While most of the mTORC1 functions that have been previously characterized at a mechanistic level take place in the cytoplasm, nuclear roles have also been reported, including direct association of TOR kinase with rRNA genes. This review highlights the recent observation thatSaccharomyces cerevisiaeTor1p also binds directly to the RNA polymerase II-transcribed gene encoding Hmo1p, a protein that is involved in communicating mTORC1 activity to downstream targets. A reduction inHMO1mRNA levels in response to DNA damage or addition of rapamycin requires Tor1p, suggesting a role for TOR kinase in control of gene activity by direct binding to target genes. Potential targets for chromatin-bound Tor1p are discussed and the possibility that Tor1p similarly contributes to control of other genes linked to ribosome biogenesis is considered.
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