组织素脱乙酶复合体在正常植物生长和发育过程中,以及对斯酸盐的反应中,调节了素生物合成
Fei Huang1, Zhaoxia Zhang2, Jiabin Gu3
1Peking-Tsinghua Center for Life Sciences & State Key Laboratory of Wheat Improvement, School of Advanced Agricultural Sciences, Peking University, Beijing 100871, China; College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China.
Plant communications
|November 6, 2025
概括
一个新发现的调节模块,涉及VAL1,JAZ蛋白和SNL-HDA19c复合体,控制植物中安托素颜料的产生. 这种机制解释了斯酸如何快速触发用于应激适应的安托西亚宁合成.
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 生化学
背景情况:
- 安西安素是重要的植物颜料,参与生长,适应和耐压力.
- 控制氨酸生物合成的精确调节机制尚未完全理解.
- 识别这些途径对于了解植物对环境线索的反应至关重要.
研究的目的:
- 为了阐明调节Arabidopsis thaliana中安东生物合成的分子机制.
- 为了确定关键的蛋白质和复合物参与控制安托素生产.
- 了解压力激素如斯蒙酸如何影响安托西亚宁合成.
主要方法:
- 染色体免疫沉测试用于评估蛋白质与PAP1位点的结合.
- 基因组脱乙酶活性测定用于测量表观遗传修饰.
- 蛋白质与蛋白质相互作用研究,绘制监管网络的地图.
- 基因表达分析以量化安东素通路基因活性.
主要成果:
- 发现了一种新的调控模块,包括VAL1,JAZ蛋白和SNL-HDA19c复合体.
- 该模块可以动态调节"安东基安素颜料1 (PAP1) "基因的产生.
- 雅斯蒙酸信号触发了JAZ蛋白质的降解,导致VAL1和SNL-HDA19c的释放,促进了素的产生.
结论:
- 在正常情况下,VAL1-JAZ-SNL-HDA19c模块充当了氨酸生物合成的抑制剂.
- 雅斯蒙酸通过破坏这种压制性复合体,迅速诱导抗生素的产生.
- 这为快速适应通过安东素积累的压力提供了分子基础.
相关概念视频
Cell Signaling in Plants
6.1K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
6.1K
Gene Regulation During Sporulation
427
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
427
The Antenna Complex
7.5K
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
7.5K
Fruit Development, Structure, and Function
24.8K
Fruits form from a mature flower ovary. As seeds develop from the ovules contained within, the ovary wall undergoes a series of complex changes to form fruit. In some fruits, such as soybeans, the ovary wall dries; in other fruits, such as grapes, it remains fleshy. In some cases, organs other than the ovary contribute to fruit formation; such fruits are called accessory fruits.
24.8K
Histone Modification
15.9K
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
15.9K
Histone Modification
4.4K
4.4K


