在中央营养成长网络中发现酸盐-CPK-NLP信号
Kun-Hsiang Liu1,2, Yajie Niu1, Mineko Konishi3
1Department of Molecular Biology and Centre for Computational and Integrative Biology, Massachusetts General Hospital, and Department of Genetics, Harvard Medical School, Boston, Massachusetts 02114, USA.
Nature
|May 11, 2017
概括
植物营养信号涉及 (Ca2+) 路径. 这项研究确定了传感器蛋白激酶 (CPK) 和NIN-LIKE PROTEIN (NLP) 转录因子作为酸盐反应的关键调节者,影响生长和发育.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 营养信号传递对于植物生长至关重要,协调基因表达和新陈代谢.
- 营养信号的基础分子机制,特别是酸盐反应,尚未完全理解.
- (Ca2+) 离子在植物信号通路中充当关键的第二信使.
研究的目的:
- 阐明植物中酸盐触发的 (Ca2+) 信号的分子机制.
- 为了确定主要酸盐反应的关键调节者在Arabidopsis.
- 定义与酸盐信号相关的全面监管和发展计划.
主要方法:
- 在Arabidopsis中利用超敏感的Ca2+生物传感器进行实时成像.
- 进行了功能性基因组选,以识别Ca2+传感器蛋白激酶 (CPKs).
- 使用化学交换策略与工程突变 (CPK10(M141G)) 来分析三重突变 (cpk10 cpk30 cpk32).
主要成果:
- 发现了由酸盐触发的独特的Ca2+信号,由III小组CPKs主导.
- 确定了CPK作为初级酸盐反应的主调节剂.
- 证明CPK信号化了NIN-LIKE PROTEIN (NLP) 转录因子,为各种细胞过程重新编程基因组.
- 表明CPK和NLP突变物同样会损害酸盐刺激的芽生长和根部建立.
结论:
- 营养配对的Ca2+信号集成转录组和细胞代谢与芽根协调.
- 基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因基因.
- 这种信号网络在发育可塑性中起着至关重要的作用,影响器官生物质和结构.
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