在S. cerevisiae的热耐受性作为研究细胞外囊泡生物学模型
Curtis John Logan1, Claire C Staton1, Joshua Thomas Oliver1
1Department of Biology, Concordia University, Montreal, Quebec, Canada.
Journal of extracellular vesicles
|May 7, 2024
概括
酵母细胞通过细胞外囊泡 (EVs) 转移热应激生存. 这些EV含有热冲击蛋白 (HSP70),调解热耐受性,并揭示了压力反应中保守的外体组作用.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 酵母遗传学 酵母遗传学
背景情况:
- 芽酵母Saccharomyces cerevisiae是真核生物学的一个成熟的模型.
- 酵母菌中的细胞外囊泡 (EV) 生物学仍然相对缺乏研究.
- 了解EV介导的细胞间通信对于理解细胞反应至关重要.
研究的目的:
- 为了研究细胞外囊泡在酵母耐热性中的作用.
- 为了识别EV中负责热应力生存转移的分子组件.
- 建立Saccharomyces cerevisiae作为研究真核生物体EV生物学的一个模型.
主要方法:
- 酵母培养和热应激实验.
- 细胞外囊泡丰富样本的分离和表征.
- 使用ESCRT机械抑制剂破坏外体细胞生物发生.
- 布罗1的光标记 (GFP) 用于跟踪EV释放和吸收.
- 用EV丰富的样本进行蛋白质组学分析.
- 对SSA2删除突变体的遗传分析.
主要成果:
- 酵母细胞通过细胞外介质传递热耐受性,通过EV丰富样本进行介导.
- 富含EV的样本含有异构体大小的颗粒;破坏异构体生物发生抑制了耐热转移.
- 人类ALIX的同类物Bro1存在于酵母EV中,有助于跟踪它们的释放和吸收.
- 蛋白质组学揭示了热冲击蛋白70 (HSP70) 家庭蛋白质在热耐受性传递EVs中的丰富.
- 电动汽车中存在HSP70正极 Ssa2,它缺少就会阻止热耐性转移.
结论:
- 细菌菌EVs,特别是含有Ssa2的外体,促进细胞间耐热转移.
- 这项研究推进了酵母作为真核生物EV生物学模型的发展.
- 外体体在真核生物中热应激反应和蛋白质稳定中起着保留的作用.
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