需要通过OST1对MAP4K1和MAP4K2进行酸化,以获得耐旱性
Pengcheng Hu1, Lipeng Zheng1, Lan Chen1
1Center for Advanced Interdisciplimary Science and Biomedicine of Institute of Health and Medicine, Division of Life Sciences and Medicine, Bio-Breeding of Laboratory of Anhui Province, University of Science and Technology of China, Hefei, China.
The Plant journal : for cell and molecular biology
|February 5, 2026
概括
中原激活蛋白酶1和2 (MAP4K1/2) 对于植物的脱水耐受性至关重要. 这些由OST1酸化的蛋白质在酸信号通路中冗余地起作用.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 压力生理学 压力生理学
背景情况:
- 蛋白质酸化对于植物对酸 (ABA) 和脱水应激反应至关重要.
- 在脱水耐受性中,MITOGEN-ACTIVATED PROTEIN KINASE KINASE KINASE (MAP4K) 家族成员在脱水耐受性中的作用仍然在很大程度上未被探索.
研究的目的:
- 调查MAP4K1和MAP4K2对植物脱水耐受性的影响.
- 阐明MAP4K1/2,SNRK2激酶和ABA信号通路之间的关系.
主要方法:
- 使用单个和双重突变 (map4k1,map4k2,map4k1 map4k2) 的基因分析.
- 在体外和体内相互作用测试以研究蛋白质-蛋白质相互作用.
- 酸化试验和质谱检测以确定酸化地点.
主要成果:
- 双重突变的map4k1 map4k2表现出减少的脱水耐受性和对ABA的低敏感性.
- 发现MAP4K1和MAP4K2与SnRK2.2,SnRK2.3和OST1.1发生相互作用.
- 在脱水应激路径中,OST1直接化MAP4K1在Ser487和MAP4K2在Ser488,作用于MAP4K1/2的下游.
结论:
- MAP4K1和MAP4K2被确定为OST1的新基质,并在脱水耐受性方面发挥冗余作用.
- MAP4K1/2和OST1在相同的脱水应激信号通路中起作用,突出了植物应激反应中的新型调节机制.
相关概念视频
Responses to Drought and Flooding
12.1K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
12.1K
Phosphorylation
54.0K
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
54.0K
Energy-requiring Steps of Glycolysis
171.7K
Glucose is the source of nearly all energy used by organisms. The first step of converting glucose into usable energy is called glycolysis. Glycolysis occurs in the cytosol of the cell over two phases: an energy-requiring phase and an energy-releasing phase. Over the first three steps, glucose is converted into different forms and attached to two phosphate groups donated by two ATP molecules, resulting in an unstable sugar. In the next two stages, the unstable sugar splits into two sugar...
171.7K
Requirements for Human Life
13.9K
The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
13.9K
Proteins: Dietary Sources and Requirements
1.8K
Consuming animal-based products offers high-quality proteins that contain optimal levels and combinations of essential amino acids, crucial for tissue repair and growth. Foods like eggs, milk, fish, and most meats are a source of complete proteins. Legumes and cereals are abundant in proteins; however, they typically lack a full range of essential amino acids. As a result, they are considered incomplete protein sources. Some plant sources like soybeans, quinoa, and amaranth do contain complete...
1.8K
Oxygen Requirements and Growth Patterns
1.4K
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
1.4K


