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Androgen receptor responsive enhancers are flanked by consistently-positioned H3-acetylated nucleosomes.

机译:雄激素受体响应性增强剂通过始终定位的H3-乙酰化核体侧翼。

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摘要

Chromatin is remodeled and nucleosomes repositioned at genomic elements such as active gene promoters and CTCF insulators to create nucleosome free regions (NFR), where regulatory factors bind (reviewed in ref. 3). In the case of promoters, this maybe caused by RNApolymerase II occupancy and the initiation of divergent transcription, implicating the polymerase starting and then pausing transcription in opposite directions.1 Chromatin states at transcriptional enhancers are less well characterized. Active enhancers most likely loop to engage target gene promoters and modulate cell type-specific gene expression, but nucleosome positioning in relation to transcription factor occupancy has not been studied extensively at enhancers. The relative positioning of transcription factors and nucleosomes at enhancer regions may well be a pivotal factor influencing transcriptional competency.
机译:染色质被改造,并在基因组元素中重新定位的核胚源,例如活性基因启动子和CTCF绝缘体,以产生核小体的区域(NFR),其中调节因子结合(在参考文献中审查3)。 在启动子的情况下,这可能是由Rnapolymerase II占用和发散转录引起的引起的,这意味着聚合酶开始然后在转录增强剂的相反方向上的染色蛋白态表征较小。 活性增强剂最可能循环以接合靶基因启动子并调节细胞类型特异性基因表达,但是在增强剂中尚未在转录因子占用的关系中进行核心定位。 增强子区域的转录因子和核肉的相对定位可能是影响转录能力的枢转因子。

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  • 来源
    《Cell cycle》 |2010年第11期|共2页
  • 作者

    Jia L;

  • 作者单位

    USC Epigenome Center Norris Cancer Center Keck School of Medicine University of Southern California Los Angeles CA USA.;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 细胞生物学;
  • 关键词

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