Regulation of CSF1 promoter by the SWI/SNF-like BAF complex

Regulation of CSF1 promoter by the SWI/SNF-like BAF complex
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DOI:
10.1016/s0092-8674(01)00446-9
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发表时间:
2001-08-10
期刊:
影响因子:
64.5
通讯作者:
Zhao, KJ
Zhao, KJ
中科院分区:
生物学1区
文献类型:
--
作者:
Liu, R;Liu, H;Zhao, KJ

文献摘要

被引文献

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哺乳动物 BAF 复合物通过改变染色质结构来调节基因表达。在本报告中,我们鉴定了 SW-13 细胞中 BAF 复合物激活的 80 个基因和 2 个基因抑制的基因。我们发现,NFI/CTF 事先与 CSF1 启动子中的 NFI/CTF 结合位点结合是 BAF 复合物的募集和启动子的 BAF 依赖性激活所必需的。此外,CSF1启动子的激活需要Z-DNA形成序列,该序列在被BAF复合物激活后转化为Z-DNA结构。 BAF 复合物促进 Z-DNA 在体外核小体模板中的形成。我们提出了一个模型,其中 BAF 复合物促进 Z-DNA 形成,进而稳定 CSF1 启动子处的开放染色质结构。
The mammalian BAF complex regulates gene expression by modifying chromatin structure. In this report, we identify 80 genes activated and 2 genes repressed by the BAF complex in SW-13 cells. We find that prior binding of NFI/CTF to the NFI/CTF binding site in CSF1 promoter is required for the recruitment of the BAF complex and the BAF-dependent activation of the promoter. Furthermore, the activation of the CSF1 promoter requires Z-DNA-forming sequences that are converted to Z-DNA structure upon activation by the BAF complex. The BAF complex facilitates Z-DNA formation in a nucleosomal template in vitro. We propose a model in which the BAF complex promotes Z-DNA formation which, in turn, stabilizes the open chromatin structure at the CSF1 promoter.