转录因子蛋白Max的特定位点乙化调节其DNA结合活性
Raj V Nithun1, Yumi Minyi Yao2, Omer Harel1
1School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978 Israel.
ACS central science
|July 1, 2024
概括
化学蛋白质合成揭示了lys-乙化如何影响转录因子 (TF) Max与DNA结合. 在特定部位的乙化抑制了DNA结合并改变了序列的特异性,为基因调节提供了洞察力.
科学领域:
- 生物化学和分子生物学
- 遗传学和基因组学 在
- 化学生物学 化学生物学
背景情况:
- 基因表达调节依赖于转录因子 (TF) 和DNA之间的精确相互作用.
- 翻译后修饰 (PTMs),如lys-乙化,在调节TF功能的过程中起着至关重要的作用.
- 了解PTMs对TF-DNA结合的影响对于破译基因表达程序至关重要.
研究的目的:
- 研究酸乙化对DNA结合活性和Max TF的序列特异性的分子作用.
- 通过化学蛋白质合成合成修饰的Max TF变体,并评估它们的结合特性.
主要方法:
- 采用化学蛋白质合成,创建了一个Max TF变体库,具有特定位点的乙化和光标签.
- 使用高通量选技术测量了这些合成变体的DNA结合活性和序列特异性.
主要成果:
- 发现Lys-31和Lys-57的乙化显著抑制了Max TF的DNA结合活性.
- 修改后的Max变种表现出改变了对DNA序列的结合特异性,这些DNA序列围绕着共识结合点.
- 该研究提供了关于PTM如何影响TF-DNA相互作用的定量数据.
结论:
- lys-乙化作为Max TF DNA结合的关键调节剂,影响亲和力和特异性.
- 这项研究揭示了PTM和TF-DNA相互作用在基因表达控制中的复杂相互作用.
- 这些发现为深入了解控制基因表达的监管代码铺平了道路.
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