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Updated: Jun 21, 2025

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Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
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细胞状态改变了染色质的可访问性和p53与DNA的结合
Daniel Ocampo1, Leah J Damon1, Lynn Sanford2
1Department of Biochemistry, University of Colorado, Boulder, CO, USA.
Life science alliance
|July 5, 2024
概括
细胞水平影响DNA可访问性和转录因子结合. 虚性的变化改变了染色质的可访问性,影响了哪些转录因子与DNA结合,特别是指蛋白.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 细胞的新陈代谢
背景情况:
- (Zn2+) 对许多人体蛋白质至关重要,包括800多个转录因子.
- 转录因子获得Zn2+的机制及其对细胞Zn2+水平的敏感性尚未完全理解.
研究的目的:
- 为了研究池中的变化如何影响人体细胞中的染色质可访问性和转录因子丰富性.
- 为了确定水平的变化是否对转录因子在促进体与基因间区域的结合有不同的影响.
主要方法:
- 使用测序 (ATAC-seq) 进行转化酶可访问染色质的测试,以绘制染色质可访问性的地图.
- 对ATAC-seq数据进行了转录因子丰富分析,以确定受影响的转录因子.
- 使用染色体免疫沉,然后进行定量PCR (ChIP-qPCR) 来验证转录因子结合位的占用.
主要成果:
- 显著数量的转录因子基因 (685) 显示出差异性丰富,相当于507个独特的转录因子,以应对改变的水平.
- 在高条件下,指转录因子在基因间区域显著丰富.
- 使用ChIP-qPCR的验证证实,ATAC-seq预测的染色质可访问性的变化与多个位点的p53的实际转录因子结合相关.
结论:
- 不稳定水平动态调节染色质可访问性和转录因子与DNA结合.
- 这项研究揭示了转录因子在不同基因组背景下 (促进者与基因间区域) 对波动的明显反应.
- 研究结果提供了对稳态及其在基因调节中的作用的见解.
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