转录组概况为Spathaspora passalidarum的乙醇应激反应带来了新的见解
Fernanda Matias Albuini1, Alex Gazolla de Castro2, Valquíria Júnia Campos1
1Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Av. PH Rolfs s/n, Campus Universitário, Viçosa, MG, 36570-900, Brazil.
Applied microbiology and biotechnology
|September 1, 2023
概括
由于营养吸收和细胞代谢受损,Spathaspora passalidarum对乙醇的耐受性较低. 乙醇压力会停止其发酵,导致伪球体的形成和延迟的西洛斯消耗.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 酵母发酵 酵母发酵的方法
背景情况:
- 斯帕萨斯波拉 (Spathaspora passalidarum) 是一个关键的微生物,用于基纤维素水解酸的发酵.
- 与Saccharomyces cerevisiae相比,这种酵母对乙醇的敏感性更高,其潜在机制尚不清楚.
研究的目的:
- 在乙醇压力下调查S. passalidarum的转录变化.
- 为了阐明其有限的乙醇耐受性的分子基础.
主要方法:
- RNA测序 (RNA-seq) 用于分析基因表达变化.
- 对酵母形态和脂肪酸概况的分析.
主要成果:
- 乙醇的压力对转化和应激反应 (热冲击,抗氧化剂) 的基因进行了上调,但降低了脂质代谢,营养物质转运器和甘油性/发酵酶的调节.
- 观察到受损的透应激反应和延迟的脂肪酸概况变化.
- 乙醇诱导了伪形态,表明营养素的误解.
结论:
- 在S. passalidarum中低乙醇耐受性是由于延迟的膜调整,停止的新陈代谢和营养吸收,以及缺陷的透应激基因诱导.
- 这些因素共同限制了其在基纤维素生物炼油厂的工业应用.
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