有机酸 Ester 通过非共价相互作用来抑制酶性蛋白质分解
Zeming Wang1, Wei Zhang2, Xiaojie Hu1
1Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China.
Environment international
|January 9, 2025
概括
有机酸 (OPE) 污染抑制了酶性蛋白质水解. OPEs与蛋白质结合,改变其结构并阻碍酶活性,影响循环.
科学领域:
- 环境化学环境化学
- 生物化学 生物化学
- 生态毒理学 生态毒理学
背景情况:
- 酶蛋白解对于生态系统中的生物可用性至关重要.
- 有机污染物,如有机酸盐 (OPEs),可以破坏自然过程.
- OPEs对蛋白质降解的影响在很大程度上是未知的.
研究的目的:
- 研究OPE对蛋白质酶蛋白质解的作用GB1.
- 阐明OPEs对蛋白质水解的影响背后的分子机制.
- 了解OPE如何影响污染环境中的循环.
主要方法:
- 颜色测量九氨酸试验和SDS-PAGE用于评估蛋白质水解.
- 光灭实验以确定OPE蛋白结合亲和力.
- 用光谱分析和分子对接模拟来探索分子相互作用.
主要成果:
- OPEs显著抑制了蛋白质GB1.1的酶性水解.
- 在OPE之间,绑定亲和力有所不同,而死链和长链OPE显示出更强的相互作用.
- OPEs通过非共价相互作用诱导了GB1的结构变化,阻碍了酶的访问.
结论:
- OPEs通过与蛋白质结合并改变其结构来干扰酶性蛋白质降解.
- 这种抑制可以影响受污染的生态系统中的营养循环和生态功能.
- 需要进一步的研究来评估OPE污染的更广泛的生态后果.
相关概念视频
Anticholinesterase Agents: Poisoning and Treatment
783
Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is...
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is...
783
Indirect-Acting Cholinergic Agonists: Mechanism of Action
1.6K
Indirect-acting cholinergic agonists work by interacting with an enzyme called acetylcholinesterase (AChE) in the synaptic cleft. They can be reversible or irreversible inhibitors and have different effects on the enzyme.
Reversible inhibitors like edrophonium bind to a specific part of the enzyme called the anionic catalytic site. They form noncovalent bonds, which means they are not strongly attached to the enzyme. This creates a temporary and less stable enzyme–inhibitor complex,...
Reversible inhibitors like edrophonium bind to a specific part of the enzyme called the anionic catalytic site. They form noncovalent bonds, which means they are not strongly attached to the enzyme. This creates a temporary and less stable enzyme–inhibitor complex,...
1.6K
Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
516
Indirect-acting cholinergic agonists are agents that interact with the acetylcholinesterase enzyme in the synaptic cleft, preventing the breakdown of acetylcholine into choline and acetate. Consequently, the concentration of acetylcholine in the synaptic cleft increases. These agonists can be classified into reversible and irreversible inhibitors based on their duration of action.
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
Reversible inhibitors display short to medium durations of action. Short-acting agents include simple alcohols with...
516
Indirect-Acting Cholinergic Agonists: Pharmacokinetics
909
Indirect-acting cholinergic agonists, or anticholinesterases, enhance the body's cholinergic activity by inhibiting acetylcholine's breakdown. They are categorized as reversible or irreversible agents based on their mechanism of action. They are further classified into short-acting, intermediate-acting, and long-acting agents based on their duration of action.
Reversible agents containing quaternary amines, such as neostigmine and edrophonium, are not easily absorbed orally because they...
Reversible agents containing quaternary amines, such as neostigmine and edrophonium, are not easily absorbed orally because they...
909
Enzyme Inhibition
77.8K
Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.
77.8K
Cholinesterases: Distribution and Function
404
Cholinesterases are a group of serine hydrolase enzymes that play a crucial role in the breakdown of choline esters. The two primary types of cholinesterases are acetylcholinesterases (AChEs) and butyrylcholinesterase (BuChEs), which differ in their distribution, function, and substrate specificity. AChEs, also known as true cholinesterases, specifically hydrolyze acetylcholine, while BuChEs, often referred to as pseudocholinesterases, can hydrolyze various choline esters, including...
404


