适应性生物分子凝聚反应在环境分歧的物种中得到保护
Samantha Keyport Kik1, Dana Christopher2, Hendrik Glauninger3,4
1Committee on Genetics, Genomics, and Systems Biology, The University of Chicago, Chicago, IL, USA.
Nature communications
|April 11, 2024
概括
细胞通过形成称为压力颗粒的蛋白质和mRNA结构来适应环境压力. 这项研究揭示了压力颗粒的形成是如何进化调整到芽酵母中特定物种的热.
科学领域:
- 细胞生物学 细胞生物学
- 进化生物学 进化生物学
- 生物化学 生物化学
背景情况:
- 细胞具有保存的应激反应,包括生长停止,转录性变化,以及在严重压力下形成像压力颗粒一样的生物分子凝结物.
- 这些压力诱导的凝聚物的精确机制,适应性作用和进化性保护在很大程度上是未知的.
- 了解应激反应对于细胞生存和适应环境挑战至关重要.
研究的目的:
- 为了研究芽酵母中压力触发的生物分子凝结的进化保存和调整.
- 探索不同热环境中的凝结,生长和转录反应之间的关系.
- 阐明分子特征和结构变化,这些变化决定了多A结合蛋白的凝结.
主要方法:
- 对三个芽酵母物种进行比较分析,它们具有不同的热和进化分歧.
- 在各种压力条件下观察和描述蛋白质分子级生物分子凝聚.
- 详细研究聚A结合蛋白凝聚,包括其分子特征和构造动态.
主要成果:
- 蛋白质组规模的生物分子凝聚精细调整为特定物种的热,反映生长和转录反应.
- 聚A结合蛋白,一个关键的压力颗粒成分,在特定物种的温度下经历孤立凝结.
- 保存的分子特征和形状变化调节了酵母物种的多A结合蛋白凝结.
结论:
- 这项研究揭示了真核细胞应激反应中显著的进化选择,特别是在应激颗粒形成中.
- 生物分子凝聚是一种进化调节的过程,与其他应激反应机制集成.
- 发芽酵母为进一步研究压力反应的生态,进化和分子机制提供了一个可处理的模型系统.
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