基于绘制其与甲基转移酶PRC2相互作用的基因组突变的癌症衍生的"排毒"策略
Zachary Z Brown1, Manuel M Müller, Siddhant U Jain
1Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States.
Journal of the American Chemical Society
|September 3, 2014
概括
基因组H3突变 (K27M) 抑制PRC2复合体,对基因组稳定性和发育至关重要. 这种抑制可以通过H3尾部的自然修饰来减少,这表明了治疗潜力.
科学领域:
- 生物化学 生物化学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 癌症生物学 癌症生物学
背景情况:
- 多镇压复合体2 (PRC2) 对于基因组稳定性和细胞发育至关重要.
- 错误调节PRC2与各种癌症有关.
- 一种特定的基因组H3突变 (H3 K27M) 抑制PRC2并与癌症表型相关.
研究的目的:
- 阐明H3 K27M突变抑制PRC2.2.的分子机制.
- 通过H3 K27M.研究有助于PRC2抑制的结构和动力因素.
- 探索自然的翻译后修饰如何影响H3 K27M的PRC2抑制.
主要方法:
- 动力学研究量化酶活性和抑制.
- 照片交叉链接实验用于绘制蛋白质与蛋白质相互作用的地图.
- 生物化学分析基因组修饰及其对PRC2功能的影响.
主要成果:
- 通过H3 K27M抑制PRC2需要在活性部位和与EZH2亚单元接触的疏水相互作用.
- 在这种抑制中,H3尾起着关键作用.
- 在H3尾部自然发生的翻译后修改显著降低了H3 K27M的PRC2抑制.
结论:
- H3 K27M突变通过特定的结构相互作用强烈抑制PRC2.
- 在H3尾部的翻译后修改可以抵消这种抑制.
- 准染色体修饰途径可能提供"解毒"瘤原H3 K27M突变的策略.
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