通过结构定义的K63-多基化链接素H1促进RNF168介导的核H2A泛基化
Qiang Shi1, Zhiheng Deng1, Liying Zhang1
1New Cornerstone Science Laboratory, Tsinghua-Peking Joint Center for Life Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Center for Synthetic and Systems Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Angewandte Chemie (International ed. in English)
|October 4, 2024
概括
我们开发了一种新的化学合成方法 (CAEPL),以创建修改后的素H1.0蛋白质. 这种方法使我们能够研究素无处不在如何影响RNF168活性和蛋白质相互作用.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 基因组中的翻译后修饰 (PTM) 调节基因表达.
- 了解不同PTM之间的功能交叉通话对于破译细胞过程至关重要.
- 改造的基因组的均质化学合成为定量分析提供了一个平台.
研究的目的:
- 开发一个有效的策略,用于特定站点的 (多) 无处不在的链接素H1.0.0.
- 调查H1.0无处不在对RNF168.8.活性的影响.
- 阐明RNF168-H1.0无处不在相互作用的结构基础.
主要方法:
- 开发了与酶蛋白联结 (CAEPL) 策略相结合的氨基乙基化策略.
- 合成的单双化和K63结合的多双化H1.0蛋白.
- 将修改后的H1.0纳入染色体,用于生物化学和冷EM分析.
主要成果:
- CAEPL的策略成功地产生了均的无处不在的H1.0蛋白质.
- 与K63结合的多基化H1.0直接刺激了RNF168的活性,通过增强其对染色体的亲和力.
- 化EM揭示了RNF168 UDM1域与H1.0.0.H1.0.0上的K63连接的乌比奎丁链之间的相互作用.
- H1.0无处不在表明RNF168活性在核细胞间和核细胞内都具有可比的刺激.
结论:
- 该CAEPL战略提供了结构定义的多基化H1.0.0的获取.
- 这有助于对链接组合基因素H1.0和核心组合基因素H2A无处不在之间的PTM交叉声学的机制研究.
- H1.0的泛基化在调节RNF168活性和染色质调节方面发挥着重要作用.
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