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相关概念视频

Factors Affecting Protein-Drug Binding: Protein-Related Factors01:20

Factors Affecting Protein-Drug Binding: Protein-Related Factors

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Drug binding to proteins is a key aspect of pharmacokinetics and can influence a drug's distribution, absorption, and elimination in the body. Several factors, including the drug's physiochemical properties, protein concentration, disease states, and the number of binding sites on the protein, influence this process.
The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be...
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The Equilibrium Binding Constant and Binding Strength02:18

The Equilibrium Binding Constant and Binding Strength

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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:
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Drug Distribution: Plasma Protein Binding01:29

Drug Distribution: Plasma Protein Binding

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Drugs predominantly attach to plasma proteins, with only a small percentage remaining unbound. The unbound portion can be calculated as one minus the bound fraction. Acidic drugs form large, inactive complexes by reversibly binding to plasma albumin, which prevents them from diffusing across biological barriers. These drug-protein complexes act as reservoirs for the drugs. As the concentration of unbound drugs decreases, these complexes quickly dissociate to release the free drug, maintaining...
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Protein-Drug Binding: Determination Methods01:22

Protein-Drug Binding: Determination Methods

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Determining protein-drug binding can be achieved through indirect and direct methods, each providing valuable insights into the interaction between proteins and drugs.
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
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Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

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For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
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Protein-Drug Binding: Mechanism and Kinetics01:16

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Protein-drug binding refers to the interaction between drugs and proteins within the body. This binding process can occur intracellularly, involving drug interactions with enzymes or receptors within cells, or extracellularly, involving plasma proteins in the blood.
Various forces drive these interactions, including hydrogen bonds, hydrophobic interactions, ionic bonds, electrostatic interactions, and van der Waals forces. These bonds enable drugs to bind to specific sites on proteins,...
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相关实验视频

Updated: Jan 29, 2026

Direct Protein Delivery to Mammalian Cells Using Cell-permeable Cys2-His2 Zinc-finger Domains
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指的Ran结合蛋白3 (ZRANB3):一个先进的视角

Paride Pelucchi1, Ettore Mosca1, Nika Tomsič2

  • 1Istituto di Tecnologie Biomediche (ITB), Consiglio Nazionale delle Ricerche (CNR), Via Fratelli Cervi 93, 20054 Milano, Italy.

International journal of molecular sciences
|January 28, 2026
PubMed
概括

人类ZRANB3蛋白对于DNA损伤耐受性和基因组稳定性至关重要,作为瘤抑制剂. 它在癌症中的改变表达与生存率差相关,突出其预后潜力.

关键词:
在ATP-酶转位酶.修复DNA的修复DNA的修复癌症 癌症 癌症 癌症 癌症叉子改造商 叉子改造商 在这是一种瘤抑制剂.

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科学领域:

  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.
  • 癌症研究 癌症研究

背景情况:

  • 人类指Ran结合蛋白3 (ZRANB3) 对于DNA损伤耐受性 (DDT) 是必不可少的.
  • 在复制分叉逆转 (RFR) 和p53/Polι途径中,ZRANB3的功能涉及到它作为瘤抑制剂.
  • 瘤中ZRANB3的放缓与不良的临床结果有关.

研究的目的:

  • 对ZRANB的基因和蛋白质水平文献进行全面审查3.
  • 为了检查ZRANB3调节在癌症的发展.
  • 讨论ZRANB3作为瘤抑制剂和预后生物标志物的作用的证据.

主要方法:

  • 综合基因和蛋白质数据的文献综述.
  • 分析ZRANB3在DNA损伤耐受性和复制叉动态中的作用.
  • 在癌症中检查ZRANB3的变化 (突变,拷贝数).

主要成果:

  • 通过防止DNA损伤和恢复分叉进展,ZRANB3保持了基因组的稳定性.
  • 在瘤中,ZRANB3的表达经常受到放松,与预后不佳相关.
  • ZRANB3 mRNA和p53表达之间的相关性取决于上下文,特别是在p53突变的癌症中.

结论:

  • ZRANB3是一种关键的瘤抑制剂,参与DNA修复途径.
  • 改变的ZRANB3是各种癌症中显著的预后生物标志物.
  • 进一步研究ZRANB3在DNA合成和新陈代谢中的功能是有必要的.