HECT家族蛋白UPL3通过调节BZR1积累来抑制热态生成
Qiao-Yun Zhu1,2, Mei-Jing Wang1, Hui-Dan Luo1
1State Key Laboratory of Plant Environmental Resilience, College of Life Sciences, Zhejiang University, Hangzhou, 310027, China.
概括
温暖的温度通过影响氨 (BR) 水平来加速植物的生长. 这项研究确定了UPL3作为BR积累的关键调节剂,控制了Arabidopsis.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 铜体 (BR) 信号传递对植物发育至关重要,特别是在温暖的条件下 hypocotyl 延伸.
- 转录因子BZR1通过调节PIF4.4来调节BR促进阴囊细胞生长的过程.
- 调节BZR1水平以应对温度的精确机制在很大程度上仍未被阐明.
研究的目的:
- 研究温度反应机制在调节BZR1蛋白积累中的作用.
- 确定在温暖条件下控制BZR1水平的上游监管机构.
- 阐明 HECT E3 泛素化酶 UPL3 在热敏性阴囊细胞生长中的功能.
主要方法:
- 在体外和体内相互作用测定以确认UPL3-BZR1结合.
- 在不同温度下对野生类型和上升突变的阿拉比多普西斯的 hypocotyl 生长的分析.
- 对BZR1积累和PIF4表达的评估,以响应UPL3调制.
- 使用PIF4.4进行遗传表现分析.
主要成果:
- 这项研究确定了UPL3,HECT E3泛酸酶,作为BZR1在高温下积累的关键调节者.
- 在UPL3中发生的突变导致BZR1水平升高,并加速 hypocotyl生长,这对BR生物合成抑制敏感.
- UPL3缺乏导致PIF4表达和下游基因活性增加,表明UPL3在PIF4上游起作用.
- 发现PIF4对UPL3具有表皮性作用,证实了UPL3通过PIF4调节抑制皮细胞生长的作用.
结论:
- UPL3在调节BZR1蛋白水平方面发挥着至关重要的作用,从而控制了Arabidopsis中热响应性 hypocotyl生长.
- UPL3在PIF4的上游运行,集成温度信号来调节工厂架构.
- 这项研究揭示了一种新的调节途径,涉及UPL3在布拉辛固醇信号传递和植物热态生成中的作用.
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