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相关概念视频

Molecular Models02:00

Molecular Models

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Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
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Protein Diffusion in the Membrane01:24

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Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
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Passive diffusion is a critical process that allows small lipophilic drugs to cross the cell membrane along a concentration gradient. This mechanism's efficiency depends on four primary factors: the membrane's surface area, the drug's lipid-water partition coefficient, the concentration gradient, and the membrane's thickness.
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The Fluid Mosaic Model01:34

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The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.
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Apo2Mol:通过动态口袋意识的扩散模型进行3D分子生成.

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    Apo2Mol通过考虑蛋白质灵活性来产生新型药物分子,这是许多当前方法错过的一个关键因素. 这种基于扩散的方法设计了连接体及其标蛋白.

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    科学领域:

    • 计算化学和结构生物学
    • 人工智能在药物发现中的作用

    背景情况:

    • 基于结构的药物设计 (SBDD) 使用蛋白质结构来开发小分子连接体.
    • 现有的生成模型往往忽略了蛋白质结合口袋的灵活性,限制了药物设计的准确性.
    • 在带结合后的蛋白质构造变化对于有效的药物开发至关重要.

    研究的目的:

    • 介绍Apo2Mol,一种基于扩散的新型生成框架,用于3D分子设计.
    • 为了明确地将蛋白质结合口袋的形状灵活性纳入连接物生成过程.
    • 为了实现连接体及其相应的蛋白质口袋形状的同时生成.

    主要方法:

    • 策划了来自蛋白质数据库的超过 24,000 个 apo-holo 蛋白质 - 连接体结构对的数据集.
    • 开发了一种基于图形的全原子层次扩散模型.
    • 该模型生成3D分子,并从apo状态预测全息口袋形状.

    主要成果:

    • Apo2Mol在产生高亲缘关系联体方面取得了最先进的性能.
    • 该框架准确地捕捉了由连接体结合引起的现实的蛋白质口袋构造变化.
    • 证明了该模型在 de novo 联体和口袋形状生成方面的能力.

    结论:

    • Apo2Mol通过解决蛋白质灵活性来推进药物设计的生成模型.
    • 这种方法提供了一个更现实的仿真联体蛋白相互作用.
    • 这一框架对提高实践药物发现的效率和成功具有显著的前景.