感官电路控制细胞质介导的植物染色体B光传导
Yan Zhao1, Hui Shi2, Ying Pan1
1State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing 100871, China.
Cell
|March 17, 2023
概括
信号控制植物中的植物染色体B (phyB) 核进口. 依赖蛋白激酶 (CPKs) 酸化激活的phyB,使其转位并调解早期的光反应.
科学领域:
- 植物生物学 植物生物学
- 分子信号传递是分子信号传递.
- 摄影传导是一种光学传导.
背景情况:
- 离子 (Ca2+) 是已知的视觉传导中的中间体,但它们在植物光传导中的作用尚不清楚.
- 植物染色体B (phyB) 是一个关键的光受体,调节植物对光的反应,特别是在从黑暗转向光明的过程中.
研究的目的:
- 阐明Ca2+信号在植物光传导中的作用.
- 调查phyB在黑暗到光明过渡期间受调节的机制.
主要方法:
- 在黑暗到光明的过渡期间,研究了2+在化苗中的信号传递.
- 利用基因突变 (phyBS80A/S106A) 和核定位信号来研究phyB的功能.
- 研究了phyB,Ca2+结合蛋白激酶 (CPK6/12) 和Ca2+之间的相互作用.
主要成果:
- 红光触发Ca2+通过phyB增加,激活CPK6/12.
- 激活的CPK6/12在Ser80/Ser106中直接化光激活的phyB,从而启动核进口.
- 在Ser80/Ser106的酸化对于phyB核转移和细胞扩张中的功能至关重要.
结论:
- 一个Ca2+信号通路调节 phyB 核转位,以响应红光.
- CPK6/12作为关键的调解者,将Ca2+信号与phyb酸化和核进口联系起来.
- 这项研究揭示了phyB光传导中的一个调节循环,将Ca2+信号连接到特定的光响应.
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