类通路蛋白质的结构和相互作用分析:卡尔合成酶,卡尔异构酶和卡尔异构酶类蛋白质
Jacob A Lewis1, Eric P Jacobo1, Nathan Palmer2
1Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
International journal of molecular sciences
|June 19, 2024
概括
这项研究揭示了酸盐合成酶 (CHS),酸盐异构酶 (CHI) 和CHIL蛋白质如何在Panicum virgatum中组装起来,以调节黄酸盐的产生,影响植物生长和防御.
科学领域:
- 植物生物化学和分子生物学
- 酶学和蛋白质结构-功能关系.
- 代谢工程和途径调节
背景情况:
- 黄素是关键的植物化合物,涉及生长,紫外线保护,色素,共生和病原体抵抗.
- 酸盐合成酶 (CHS) 和酸盐异构酶 (CHI) 是黄类生物合成途径中的关键酶.
- 了解CHS,CHI和 chalcone isomerase-like protein (CHIL) 之间的相互作用对于控制黄酸生产至关重要.
研究的目的:
- 为了阐明CHS,CHI和CHIL从*Panicum virgatum*中的结构和功能相互作用.
- 研究这些蛋白质的催化机制,基质特异性和分子间相互作用.
- 了解CHS-CHI-CHIL的宏分子组合如何影响黄类生物合成.
主要方法:
- 进行X射线晶体学以确定CHS,CHI和CHIL的结构.
- 稳态动力学,光谱/热力学分析以研究酶活性.
- 分子对接,异热定位热量测量 (ITC) 和光共振能量转移 (FRET) 来分析分子间相互作用.
主要成果:
- 结构和动力学分析揭示了PvCHS通过naringenin和催化杂交的非竞争性抑制,产生CTAL.
- PvCHI对纳林基因和异基因具有双重活性,具有层次化的基质偏好.
- 受到纳金宁和纳金宁石影响的CHS-CHI-CHIL复合体形成调节了酶活性和产品形成,表明了全调节和反机制.
结论:
- 这项研究提供了对来自单一物种 *Panicum virgatum* 的三种蛋白质系统 (CHS-CHI-CHIL) 的首次见解.
- CHS-CHI-CHIL的宏分子组合对于调节产生的黄类的数量和类型至关重要.
- 这些发现强调了蛋白质与蛋白质相互作用在控制植物复杂代谢途径方面的重要性.
相关概念视频
Interactions Between Signaling Pathways
6.3K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.3K
Fruit Development, Structure, and Function
22.2K
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.
22.2K
Structure-Activity Relationships and Drug Design
699
Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...
699
Structural Protein Function
27.6K
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
27.6K
Protein Networks
3.9K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
3.9K
Quantitative Aspects of Drug-Receptor Interaction
972
The receptor occupancy theory connects a drug's response to the number of occupied receptors. With higher drug concentrations, more receptors are occupied, leading to increased responses. The formation of drug-receptor complexes involves association and dissociation rates, which reach equilibrium when the forward and backward reactions are equal. The equilibrium association constant (Ka) and its inverse, the equilibrium dissociation constant (Kd), indicate drug affinity. Higher Ka and lower...
972


