与血相关的转录因子NAC091调节了Arabidopsis thaliana中未折叠的蛋白质反应
Zheng-Ting Yang1, Si-Xian Fan1, Jing-Jing Wang2
1Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, School of Life Sciences, Guizhou Normal University, Guiyang, Guizhou 550025, China.
概括
血转录因子NAC091作为植物展开蛋白质反应 (UPR) 的关键调解者. 它将细胞内膜网膜的压力信号传递给细胞核,促进细胞的生存.
科学领域:
- 植物分子生物学 植物分子生物学
- 细胞应激反应的细胞应激反应
- 内膜系统动态 内部膜系统动态
背景情况:
- 环境压力会触发内细胞网膜 (ER) 中未折叠或错误折叠的蛋白质积累.
- 展开的蛋白质反应 (UPR) 途径被激活以减轻ER压力.
- 已知NAC062是一种等离子体膜转录因子,在ER压力下有助于细胞生存.
研究的目的:
- 鉴定和描述Arabidopsis thaliana中UPR通路的新型介质.
- 阐明NAC091在传输ER压力信号中的作用.
- 了解NAC091对植物应力耐受性的分子机制.
主要方法:
- 识别NAC091作为与血相关的转录因子.
- 在ER压力条件下对NAC091基因表达的分析,取决于bZIP60和bZIP28.
- 研究NAC091的转录活动和通过其截断形式的核定位.
- 在NAC091功能丧失突变体中评估ER应力耐受性.
主要成果:
- NAC091表达是由ER应力诱导的,主要由bZIP60和bZIP28.2调节.
- 在切断其跨膜域时,NAC091表现出转录激活和核同质化.
- 在ER压力下,NAC091从血转移到细胞核.
- NAC091调节了正规的UPR基因,增强了细胞生存.
- NAC091突变体对ER压力的耐受性降低.
结论:
- NAC091是阿拉比多普西斯中关键的UPR媒介,在血膜和核中起作用.
- NAC091有效地传递ER压力信号,减轻细胞损伤并促进植物的生存.
- 这项研究揭示了一种涉及NAC091的新信号通路,用于植物适应环境压力.
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