在酸盐饥饿期间,控制转录组变化和裂变酵母的时间寿命的因素
Angad Garg1, Ana M Sanchez2, Beate Schwer3
1Molecular Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York, USA.
The Journal of biological chemistry
|February 4, 2024
概括
裂变酵母中的酸盐饥饿引发了适应性反应. 这项研究揭示了自,转录因子Pho7和ecl基因在酵母菌生存和酸盐平衡中的关键作用.
科学领域:
- * 分子和细胞生物学
- * 酵母遗传学公司
- * 营养物质的新陈代谢
背景情况:
- * 无机酸盐 (Pi) 饥饿导致 * Schizosaccharomyces pombe * (裂变酵母) 中显著的转录组变化.
- * 关键的适应性反应包括对核糖体生物发生和翻译的下调,以及对自和酸盐调动通路的上调.
- * 研究了自,转录因子 Pho7 和 Pi 饥饿反应中的 *ecl* 基因家族的作用.
研究的目的:
- * 阐明自,Pho7和ecl基因在酸盐饥饿期间对裂变酵母生存的特定贡献.
- * 描述在酸盐剥夺期间由Pho7控制的调节网络.
- * 了解ecl*基因删除对基因表达和在营养压力下细胞寿命的影响.
主要方法:
- *对裂变酵母菌株进行基因操纵 (例如, *atg1Δ*, *pho7Δ*, *ecl3Δ*, *ecl123Δ*).
- *使用RNA测序来分析基因表达变化的转录组概况.
- *在酸盐限制条件下对细胞存活的表型分析.
主要成果:
- *ATG1* (自因子) 或PHO7* (转录因子) 的删除导致了缺乏酸盐的细胞过早死亡.
- * Pho7 是参与酸盐获取,调动和其他饥饿诱导基因的关键激活剂,包括 * ecl3 *.
- *虽然*ecl3Δ*没有影响,但删除所有*ecl*基因 (*ecl123Δ*) 缩短了慢性酸盐饥饿期间的寿命,与氨基酸-tRNA合成酶的更广泛下调有关.
- * *pho7Δ*细胞与野生类型细胞相比,对核糖体蛋白基因的下调调节较少.
结论:
- *自和Pho7在酸盐饥饿期间对裂变酵母的生存至关重要.
- * Pho7调节了一组比PHO规律中定义的更广泛的基因,影响酸盐平衡和饥饿反应.
- * *ecl*基因家族,特别是在组合中,在长时间的营养压力期间,在维持细胞功能和寿命方面发挥着作用.
- *了解这些途径对于理解裂变酵母酸盐稳态和适应策略至关重要.
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