USP8 和 Hsp70 通过协同促进 Fzr 脱和稳定来调节内因复制
Wenliang Qian1,2, Xing Zhang1,2, Dongqin Yuan1,2
1Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China.
Science advances
|March 19, 2025
概括
乌比基特异性酶8 (USP8) 和热冲击蛋白70 (Hsp70) 对于内核复制至关重要. 它们共同稳定Fizzy相关 (Fzr) 蛋白质,确保细胞生长和组织大小.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 内核复制,涉及 DNA 复制而无细胞分裂,对于真核细胞和组织生长至关重要.
- 细胞内复制的进展依赖于细胞循环调节者的循环性无化和降解.
- 控制内核复制的关键因素的特定二维基丁酶仍然未被确定.
研究的目的:
- 确定负责稳定内核复制中的关键因素的二维基因酶.
- 阐明该二维基提酶调节内核复制的机制.
- 为了研究分子陪伴者在这个过程中的作用.
主要方法:
- 在 *Drosophila* 唾液腺和 *Bombyx* 丝腺中,泛素特异性酶8 (USP8) 的耗尽.
- 分析USP8,与Fizzy相关的 (Fzr) 和热冲击蛋白70 (Hsp70) 之间的蛋白质-蛋白质相互作用.
- 在不同的实验条件下评估蛋白质稳定性和脱化状态.
主要成果:
- 在模型生物中,USP8的耗尽导致了内核复制的停止和腺体大小的减少.
- USP8直接与内核复制的主调节者Fzr相互作用并对其进行二氧化,从而使其稳定.
- Hsp70促进Fzr折叠,并增强其与USP8的相互作用,促进Fzr稳定.
结论:
- USP8是一种关键的二维基因酶,通过稳定Fzr蛋白来调节内核复制.
- Hsp70与USP8合作,通过适当的折叠和加强USP8相互作用来保持Fzr的稳定性.
- USP8和Hsp70通过协同作用,通过Fzr.的双化依赖稳定控制内核复制.
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