使用酵母模型,对5-基甲对基因组不稳定性和表型演变的影响进行了新的洞察
Ying-Xuan Zhu1,2, Min He1, Ke-Jing Li2
1Hainan Institute of Zhejiang University, Zhejiang University, Sanya, China.
Applied and environmental microbiology
|December 18, 2023
概括
5-Hydroxymethfurural (5-HMF) 增加了酵母体的基因组不稳定性,导致体积和突变. 然而,这种染色体不稳定性可以提高酵母对5-HMF的耐受性,有助于环境适应.
科学领域:
- 微生物学 微生物学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 5-Hydroxymethfurural (5-HMF) 是一种常见的食品和基纤维素解抑制剂.
- 酵母,如Saccharomyces cerevisiae,在工业和自然环境中面临各种压力因素.
研究的目的:
- 研究5-HMF对*Saccharomyces cerevisiae**的基因组稳定性和表型可塑性的影响.
- 了解5-HMF诱导的基因组变化的机制及其在酵母适应中的作用.
主要方法:
- 利用下一代测序来分析在含有5-HMF的介质上培养的酵母菌中的基因组变化.
- 检查的染色体无倍化率,大缺失/重复,异构性丧失和点突变.
- 研究了特定基因过度表达 (*ADH6*, *ZWF1*) 对基因组稳定性的影响.
主要成果:
- 暴露于5-HMF会导致形积分率升高,大量的删除/重复,以及异构性丧失.
- 观察到突变谱的转变和单体性比三体性更高的发病率.
- 一个单体突变 (染色体IX) 由于增强的酒精脱酶活性,对5-HMF表现出增加的耐药性.
- 过度表达*ADH6*和*ZWF1*使酵母基因组在5HMF压力下稳定.
结论:
- 5-HMF显著影响酵母基因组完整性,导致染色体不稳定.
- 染色体损失,通常是有害的,可以赋予耐受性,以压力因素,如5-HMF,促进环境适应.
- 研究结果提供了关于压力诱导的基因组可塑性和真核细胞适应性的见解.
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