WSB1/2向染色体结合的氨酸甲基化RelA用于蛋白质体降解和NF-κB终结
Jie Zhang1, Yuanyuan Yu2,3, Xiuqun Zou1
1Hongqiao Institute of Medicine, Tongren Hospital/Faculty of Basic Medicine, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China.
Nucleic acids research
|March 7, 2024
概括
WSB1 和 WSB2 E3 酶向甲基化RelA进行蛋白质体降解,终止促炎性基因转录. 这一发现为NF-κB信号介导的炎症性疾病提供了新的治疗点.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 免疫学 免疫学 免疫学
背景情况:
- 蛋白质酶介导的NF-κB降解对于解决炎症至关重要.
- 通过Set9介导的RelA甲基化将其启动降解,但涉及的E3结合酶是未知的.
- 持续的NF-κB激活驱动慢性炎症疾病.
研究的目的:
- 为了确定负责降解甲基化RelA的E3结合酶.
- 阐明这种E3结合酶向甲基化RelA的机制.
- 探索针对这种降解途径的治疗潜力.
主要方法:
- 染色素免疫沉测定检测蛋白质相互作用.
- 乌比基化试验用于评估蛋白质修饰.
- 网站导向突变发生和计算建模以研究蛋白质相互作用.
- 对NF-κB基因表达的分析.
主要成果:
- 确定WSB1和WSB2是E3结合酶组件,可以在染色质上识别甲基化RelA.
- WSB1/2 通过它们的 WDR 域在 RelA 上与甲基化 K314 和 K315 特别结合,促进其无处不在和降解.
- 在WSB2的WDR域中,一个保存的酸 (D158) 对于结合甲基化RelA至关重要.
- WSB1/2通过促进RelA降解来负面调节NF-κB基因的一个子集.
结论:
- WSB1 和 WSB2 作为 E3 酶,向甲基化 RelA 进行蛋白质体降解.
- 这种机制终止了NF-κB依赖转录,并防止持续的炎症.
- 通过WSB1/2介导的RelA降解代表了炎症性疾病的潜在治疗标.
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