在MLL4的三重PHD指纹磁带的Histone H4K16ac结合功能
Vikrant Kumar Sinha1, Yi Zhang1, Longxia Xu2
1Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO 80045, USA.
Journal of molecular biology
|July 22, 2023
概括
这就是MLL4蛋白质.
科学领域:
- 表观遗传学和分子生物学
- 基因规则 基因规则
- 染色体生物学 染色体生物学
背景情况:
- 人类甲基转移酶MLL4对于发育至关重要,并与疾病有关.
- MLL4有一个SET域用于H3K4me1和七个PHD指,在6个上有有限的结构和功能数据.
- 了解MLL4的PHD指是其在基因调节中的作用的关键.
研究的目的:
- 在结构和功能上描述MLL4 PHD指纹录音带,特别是MLL4PHD456.
- 为了研究MLL4PHD456模块的结合特性和选择性.
- 探索由MLL4.4介导的基因素修饰H4K16ac和H3K4me1之间的功能相关性.
主要方法:
- 生物化学试验分析蛋白质-素和蛋白质-DNA相互作用.
- MLL4 PHD指纹录音带的结构分析.
- 基斯顿修饰试验用于评估MLL4活性.
主要成果:
- 三重PHD指纹带的MLL4PHD456形成了一个集成的功能模块.
- 这个模块通过PHD6.6ac选择性地结合到 histone H4 (H4K16ac) 的乙化lysine 16.
- MLL4PHD456证明了DNA结合的能力.
结论:
- MLL4 PHD456模块是识别H4K16ac和结合DNA的关键功能单元.
- 这些发现揭示了H4K16ac识别与MLL4的H3K4me1催化之间的功能联系.
- 这项研究提供了关于MLL4在表观遗传调节中的作用的结构和功能见解.
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