在酵母细胞壁应激的适应性反应期间,合成速率和mRNA稳定性的全球变化
José García-Martínez1, Jose M Rodríguez-Peña2, José E Pérez-Ortín1
1Instituto de Biotecnología y Biomedicina (BIOTECMED), Facultad de Biológicas, Universitat de València, C/Dr. Moliner 50, Burjassot, E46100, Spain.
Scientific reports
|July 12, 2025
概括
酵母细胞壁的压力主要通过减少合成而不是稳定性来影响mRNA水平. 新发现揭示了特定的基因通过增加合成和稳定性来积累mRNA,突出显示了转录后缓冲机制.
科学领域:
- 分子生物学分子生物学
- 酵母遗传学 酵母遗传学
- 细胞应激反应的应激反应
背景情况:
- 细胞采用复杂的机制来应对环境压力.
- 细胞壁完整性 (CWI) 途径对于管理酵母细胞壁应激至关重要.
- 细胞壁应激期间的mRNA动态尚不清楚.
研究的目的:
- 研究细胞壁应激下Saccharomyces cerevisiae的mRNA合成和稳定性的全基因组变化.
- 阐明转录和转录后调节在应对细胞壁压力的作用.
- 为了确定参与CWI途径的新基因和调节因素.
主要方法:
- 基因组运行 (GRO) 分析以测量全基因组mRNA合成速率.
- 在压力条件下分析mRNA稳定性.
- 集群分析以确定稳定性发生重大变化的转录.
主要成果:
- 细胞壁压力 (刚果红色) 导致mRNA水平的全球适度下降,主要是由于合成率降低.
- 总的来说,mRNA稳定性基本保持不变,与其他应激反应形成鲜明对比.
- 大约15%的转录显示稳定性的显著变化,一些CWI-依赖的基因通过增加合成和稳定性积累mRNA.
- 观察到转录后缓冲,一些基因显示合成增加但mRNA水平稳定.
- 发现了新刚果红色反应基因,并提出了转录因子Met32,Rpn4和RNA结合蛋白Nab2,Hrp1的潜在作用.
结论:
- 酵母细胞壁应激主要通过合成调节影响mRNA水平,显著的基因子集表现出改变的稳定性.
- 这些发现揭示了酵母细胞壁应激反应中转录后控制和缓冲的新方面.
- 这项研究促进了对CWI通路内的转录和后转录调节的理解.
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