可逆无化调节HSF1阶段分离,以应对蛋白质毒性压力
Yue Zhu1, Jianhua Wang2, Shuhong Tang2
1The Fifth People's Hospital of Dalian, Dalian Medical University, Dalian, China; Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.
Life sciences
|January 24, 2026
概括
在蛋白质毒性应激过程中,乌比基因化驱动热冲击因子1 (HSF1) 凝结. STUB1促进HSF1相分离,而USP13和ATXN3抑制它,揭示了关键的调节作用.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 压力反应应激反应
背景情况:
- 热冲击因子1 (HSF1) 在蛋白质毒性压力下形成核凝结物,影响细胞命运.
- 蛋白质ubiquitination是一个关键的翻译后修改,涉及液体-液体相分离.
- 在HSF1凝结过程中,无处可见的精确作用仍然在很大程度上是未知的.
研究的目的:
- 为了研究如何在蛋白质毒性压力经历的细胞中,ubiquitination调节HSF1相分离.
- 为了识别参与HSF1凝结的特定的乌比基因酶和脱基因酶.
主要方法:
- 免疫光测试检测HSF1凝结物形成.
- 在光漂白后的光恢复 (FRAP) 分析HSF1相隔动态.
- 西方涂抹,免疫沉和突变发生,以识别调节酶和无处不在的位.
主要成果:
- 蛋白质酶抑制剂PS341诱导了时间依赖的HSF1核凝结物形成.
- 通过增强的ubiquitination,STUB1促进了HSF1相分离.
- 脱化酶 (DUB) USP13和ATXN3负调节了HSF1的凝结.
- 在HSF1泛位的突变显著抑制了凝析物形成.
结论:
- 在蛋白质毒性压力下,在多重氨酸残留处的乌比基因化对于驱动HSF1相分离至关重要.
- HSF1相分离由E3无酸酶STUB1和DUBsUSP13和ATXN3.3协调调节.
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