通过TOR信号通路,光能促进缺乏的Chromochloris zofingiensis细胞的细胞增殖和阿斯坦丁的积累
Min Gao1, Shiqing Jia1, Ziyu Chang1
1Ministry of Education Key Laboratory of Molecular and Cellular Biology, Hebei Collaborative Innovation Center for Eco-Environment, Hebei Research Center of the Basic Discipline of Cell Biology, College of Life Sciences, Hebei Normal University, Shijiazhuang, 050024, China.
Plant physiology and biochemistry : PPB
|January 27, 2026
概括
光显著增加了微藻中的阿斯塔克桑生产,通过激活拉巴胺素的目标 (TOR) 信号通路,增强细胞生长和在饥荒下使用. 这一途径是光诱导的胡卜素积累的关键.
科学领域:
- * 生物技术 * 生物技术
- * 微藻生理学 微藻生理学
- * 分子生物学 * 分子生物学
背景情况:
- *光是微藻中阿斯塔桑生物合成的关键调节剂,但其精确的生理和分子效应尚未完全理解.
- *了解这些机制对于优化阿斯塔克桑生产至关重要,阿斯塔克桑是一种具有抗氧化特性的有价值的胡卜素.
研究的目的:
- * 阐明微藻中光介导的阿斯塔山丁积累的生理影响和分子机制.
- * 调查拉帕的目标 (TOR) 信号通路在饥饿过程中的作用.
- * 确定关键的调节基因和参与光诱导的阿斯塔山丁生物合成的途径.
主要方法:
- * 微藻在不同的光照条件下 (明亮与黑暗) 和的可用性下进行培养.
- *测量细胞密度,蛋白质含量,阿斯塔山丁含量和TOR活性.
- *抑制TOR信号通路,以评估其作用.
- *比较转录组分析和权重基因共表达网络分析 (WGCNA).
- * 全基因组DNA甲基化分析.
主要成果:
- *光显著促进细胞增殖,再分配和通过TOR信号通路在饥饿下通过阿斯塔桑积累.
- *与黑暗环境相比,暴露于光线 (200μmol m−2 s−1) 增加了细胞密度22%,蛋白质含量100% ,阿斯塔山丁含量136%,TOR活性335%.
- *阻断TOR信号传递损害了光诱导效应,而反应性氧物种 (ROS) 水平在光下降,表明它们不是正调节剂.
- *TOR介导的光照暴露提高了能量生产和胡卜素生物合成途径中的基因.
- *WGCNA确定MYB3R和bZIP是TOR下游潜在的关键调节基因.
- *TOR参与了在强光下抑制全球DNA甲基化,促进基因表达.
结论:
- * 拉巴胺素 (TOR) 信号通路的目标是微藻在饥状态下因光诱导的阿斯塔山丁积累的关键调解者.
- *光线通过TOR-依赖的基因表达和DNA甲基化调节影响细胞增殖,再分配和胡卜素生物合成.
- *本研究提供了理论框架和实践策略,用于增强微藻中的阿斯塔丁产量.
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