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相关概念视频

The Equilibrium Binding Constant and Binding Strength02:18

The Equilibrium Binding Constant and Binding Strength

The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
The Equilibrium Binding Constant and Binding Strength02:18

The Equilibrium Binding Constant and Binding Strength

The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
Drug-Receptor Bonds01:25

Drug-Receptor Bonds

Drug-receptor bonds are formed through various chemical forces when drugs interact with target cells. Covalent bonds, strong and irreversible, are exemplified by DNA-alkylating anticancer agents that inhibit cell division. However, such irreversible drug binding lacks selectivity and can modify the DNA of the surrounding healthy cells. Covalent binding often contributes to tissue toxicity, as seen with chloroform and paracetamol metabolites binding to the liver, causing hepatotoxicity.
In...
Drug-Receptor Interactions01:29

Drug-Receptor Interactions

Drug-receptor interaction describes the binding of receptors by drugs, but not all drug-receptor interactions result in activation and tissue response. For instance, the binding of agonists activates the receptor to generate a cellular reaction, while antagonists bind to receptors without causing their activation.
Several parameters, such as the drug's affinity for its receptor and its efficacy, which is its ability to activate the receptor, determine the drug's effect on the tissue.
Combined Effects of Drugs: Antagonism01:30

Combined Effects of Drugs: Antagonism

The combined effects of drugs can result in various interactions, of which an important type is antagonism. Antagonism is a mechanism where one drug inhibits or counteracts the effects of another drug. Antagonism can occur through various means, including receptor binding, allosteric modulation, functional interaction, chemical reactions, and pharmacokinetic processes.
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...
Agonism and Antagonism: Quantification01:14

Agonism and Antagonism: Quantification

When drugs are administered, they can elicit either an agonist or antagonist effect on the body. Agonism occurs when a drug activates a specific receptor, triggering a biological response. On the other hand, antagonism happens when a drug binds to the same receptors but blocks their activation, thereby preventing a biological response.
To quantify these effects, researchers use a dose-response curve, which provides valuable information about the potency and efficacy of a drug. Potency refers to...

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相关实验视频

Updated: Jul 5, 2026

High Throughput, Real-time, Dual-readout Testing of Intracellular Antimicrobial Activity and Eukaryotic Cell Cytotoxicity
09:09

High Throughput, Real-time, Dual-readout Testing of Intracellular Antimicrobial Activity and Eukaryotic Cell Cytotoxicity

Published on: November 16, 2016

了解结合亲和力:一项联合异热定位热度计/分子动力学研究,研究一系列化抑制剂的与素结合.

Reinskje Talhout1, Alessandra Villa, Alan E Mark

  • 1Physical Organic Chemistry Unit, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.

Journal of the American Chemical Society
|August 28, 2003
PubMed
概括
此摘要是机器生成的。

研究蛋白酶素抑制剂的研究表明,像疏水性这样的简单因素是不够的. 结合是复杂的,受到硬质障碍,基链长度和活性部位水化成本的影响.

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A Flow Cytometry-based Assay to Identify Compounds That Disrupt Binding of Fluorescently-labeled CXC Chemokine Ligand 12 to CXC Chemokine Receptor 4
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Published on: March 10, 2018

Diagonal Method to Measure Synergy Among Any Number of Drugs
12:08

Diagonal Method to Measure Synergy Among Any Number of Drugs

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科学领域:

  • 生物化学 生物化学
  • 结构生物学 结构生物学
  • 计算化学计算化学

背景情况:

  • 血清蛋白酶,如素,是关键的药物标.
  • 了解抑制剂结合是药物设计的关键.

研究的目的:

  • 为了研究p-基基化抑制剂对素的结合热力学.
  • 阐明固体阻碍,水性和活性部位水化在抑制剂结合中的作用.

主要方法:

  • 异热定位热量计 (ITC) 用于测量结合热力学.
  • 分子动力学 (MD) 模拟用于分析结构和动力学效应.
  • 分析热容量,溶剂可访问的表面积和活性部位的水分.

主要成果:

  • 抑制剂的结合亲和力对位的微妙结构变化很敏感.
  • 观察到补偿的力-力差异.
  • 结合亲和力随着线性基链长度的增加而增加,但随着分支而减少.
  • 简单的疏水性和硬质障碍模型不足以解释具有约束力的数据.

结论:

  • 结合是由一个复杂的因素的相互作用,超出了简单的疏水性和无菌效应.
  • 活性部位脱水成本和可访问性在抑制剂与素结合中起着重要作用.
  • 需要进一步的研究,以充分描述这些复杂的相互作用,以合理设计药物.