酵母菌中Atg8-和TORC1-介导活动的合作功能
Yumiko Oba1,2, Miyuki Higuchi1, Naoka Takahashi3
1Department of Agriculture, Shizuoka University, Shizuoka, Japan.
Yeast (Chichester, England)
|June 26, 2025
概括
自相关蛋白8 (Atg8) 对于细胞存活至关重要,当目标拉巴胺素复合体1 (TORC1) 信号受损时. 它的脂质依赖和脂质独立功能都至关重要,特别是在营养应激和金属离子暴露下.
科学领域:
- 细胞生物学 细胞生物学
- 分子遗传学 分子遗传学
- 生物化学 生物化学
背景情况:
- 拉帕素复合体1 (TORC1) 的标是受营养可用性影响的细胞过程的关键调节者.
- 与自相关的蛋白8 (Atg8) 有多种作用,包括自中的依赖脂质的功能和涉及Hfl1.1的依赖脂质的功能.
研究的目的:
- 研究Saccharomyces cerevisiae Atg8在细胞对TORC1活动受损的反应中的作用.
- 确定Atg8的依赖脂质和独立功能在TORC1抑制下对细胞存活的必要性.
主要方法:
- 使用的Saccharomyces cerevisiae突变菌,包括ATG8,ATG7,HFL1和它们的组合.
- 评估了对拉巴胺素治疗 (TORC1抑制剂) 和突变的KOG1等位基因的细胞敏感性.
- 在TORC1抑制下对金属离子 (Zn2+) 暴露的检查反应.
主要成果:
- 一个ATG8突变体对TORC1抑制具有高度敏感性.
- 双重突变的atg7Δhfl1Δ在对TORC1活动受损的反应中表现出缺陷,这表明了Atg8功能的重要性.
- 在低剂量拉巴胺素治疗期间,atg8Δ和atg7Δhfl1Δ突变体都对Zn2+敏感.
结论:
- 在TORC1活性受损时,Atg8的脂化依赖和脂化独立功能对于细胞存活至关重要.
- 通过Atg8介导的功能和TORC1信号传递对细胞生长至关重要,可能通过保持真空球完整性.
- 这些发现突显了自,TORC1信号传递和细胞平衡之间的复杂相互作用.
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