Transcription. Repressive transcription.

Transcription. Repressive transcription.
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DOI:
10.1126/science.1193995
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发表时间:
2010-07-09
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Young RA
Young RA
中科院分区:
其他
文献类型:
--
作者:
Guenther MG;Young RA

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在发育过程中,基因组的活性和抑制部分是如何建立和维持的?在脊椎动物中,约2 m的DNA以某种方式包装到染色质中,这种方式允许某些基因座的主动转录和其他基因座的抑制。大多数染色质调节因子不识别特定的DNA序列,那么它们是如何被募集到整个基因组的特定位点的呢?对于活跃转录的基因,转录因子或转录起始装置募集与活跃染色质相关的调节子。对于被抑制的基因,最近的研究提出了一个违反直觉的模型:转录启动了抑制性染色质(-)的形成。
How are active and repressed portions of the genome established and maintained during development? In vertebrates, about 2 m of DNA is packaged into chromatin in a manner that allows for active transcription of some loci and repression of others. Most chromatin regulators do not recognize specific DNA sequences, so how are they recruited to specific sites throughout the genome? For actively transcribed genes, transcription factors or the transcription initiation apparatus recruit regulators associated with active chromatin . For genes that are repressed, recent studies suggest a counterintuitive model: Transcription initiates the formation of repressive chromatin (–).
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