USP37 防止通过 MCM 复杂的 deubiquitination 进行非预定的复杂体卸载
Derek L Bolhuis1,2, Dalia Fleifel1, Thomas Bonacci2
1Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
bioRxiv : the preprint server for biology
|September 16, 2024
概括
人类USP37通过对CMG螺旋酶进行二基因化,防止过早的复制体分解. 这保证了基因组的稳定性和正常细胞周期的进展,提供了潜在的癌症治疗目标.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- 细胞DNA复制依赖于复制体内的CMG酶 (CDC45-MCM2-7-GINS).
- 复制体组装和拆卸对于基因组稳定性和细胞周期控制至关重要.
- 防止CMG酶过早卸载的因素尚未得到充分了解.
研究的目的:
- 识别防止CMG酶过早卸载和复合体拆卸的因素.
- 调查二维基基因酶 (DUBs) 在维护复制体完整性的作用.
- 描述人类USP37在DNA复制和细胞周期进展中的功能.
主要方法:
- 在人类细胞中准功能丧失的基因选.
- 复制体动态的量化单细胞分析.
- 蛋白质组学和酶分析以确定蛋白质相互作用和功能.
- 分析USP37在应对复制压力的作用.
主要成果:
- 人类USP37被确定为一个关键的DUB,防止复制体分解.
- USP37维持S相染色体上的活性复合体,并促进细胞循环的进展.
- USP37直接与CMG复合体相互作用,使MCM7脱,从而对抗拆卸.
- USP37保护正常细胞免受coprotein诱导的复制压力.
结论:
- 在S阶段,USP37对于保持S阶段的活性复原体是必不可少的.
- USP37 MCM7 的二氧化化防止了 CMG 的过早卸载和复合体的拆卸.
- 针对USP37可能为DNA复制控制受损的癌症提供治疗策略.
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