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, USA.
Nature communications
|May 16, 2025
概括
人类USP37通过使MCM7脱,保持活跃的DNA复制,防止过早的复制体分解. 这种二基因酶保证了基因组的稳定性,并保护细胞免受复制压力.
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 是一个遗传学.
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进展至关重要.
- 防止CMG酶过早卸载和复合体分解的因素尚不清楚.
研究的目的:
- 为了识别防止CMG基酶过早卸载的关键二维基因酶 (DUB).
- 调查USP37在S阶段维持复杂体稳定中的作用.
- 探索针对癌症USP37的治疗潜力.
主要方法:
- 在人类细胞中准功能丧失的基因选.
- 复合体动态的量化单细胞分析.
- 蛋白质组学和生物化学分析以确定蛋白质相互作用和酶活性.
- 评估USP37在应对复制压力的作用.
主要成果:
- USP37被确定为一个关键的DUB,防止过早的复杂体解体.
- USP37在S相染色体上保持CMG酶复合物的活性,促进细胞循环的进展.
- USP37与CMG复合体直接相互作用,并对MCM7进行二基化,对抗其分解.
- USP37保护正常的上皮细胞免受coprotein诱导的复制压力.
结论:
- 在S阶段,USP37对于保持复制体完整性至关重要.
- USP37对抗了无处不在化介导的CMG酶分解.
- 针对USP37可能为DNA复制控制受损的癌症提供一种新的治疗策略.
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