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相关概念视频

Induced-fit Model01:13

Induced-fit Model

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Most chemical reactions in cells require enzymes—biological catalysts that speed up the reaction without being consumed or permanently changed. They reduce the activation energy needed to convert the reactants into products. Enzymes are proteins, that usually work by binding to a substrate—a reactant molecule that they act upon.
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
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Enzymes02:34

Enzymes

80.7K
Inside living organisms, enzymes act as catalysts for many biochemical reactions involved in cellular metabolism. The role of enzymes is to reduce the activation energies of biochemical reactions by forming complexes with its substrates. The lowering of activation energies favor an increase in the rates of biochemical reactions.
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
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Protein-protein Interfaces02:04

Protein-protein Interfaces

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
12.5K
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

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For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
7.9K
Introduction to Enzymes01:22

Introduction to Enzymes

17.1K
The use of enzymes by humans dates to 7000 BCE. Humans first used enzymes to ferment sugars and produce alcohol without knowing that this was an enzyme-catalyzed reaction. Wilhelm Kuhne coined the term 'enzyme' in 1877 from the Greek words ‘en’ meaning ‘in’ or ‘within’ and ‘zyme’ meaning ‘yeast.’
Most enzymes are proteins that speed up biochemical reactions without being consumed. Enzymes contain one or more active sites that...
17.1K
Introduction to Enzyme Kinetics01:19

Introduction to Enzyme Kinetics

19.7K
Enzyme kinetics studies the rates of biochemical reactions. Scientists monitor the reaction rates for a particular enzymatic reaction at various substrate concentrations. Additional trials with inhibitors or other molecules that affect the reaction rate may also be performed.
The experimenter can then plot the initial reaction rate or velocity (Vo) of a given trial against the substrate concentration ([S]) to obtain a graph of the reaction properties. For many enzymatic reactions involving a...
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相关实验视频

Updated: Jun 4, 2025

Identification of Kinase-substrate Pairs Using High Throughput Screening
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Identification of Kinase-substrate Pairs Using High Throughput Screening

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深度学习驱动的洞察力对酶基质相互作用的发现发现

Wenjia Qian1, Xiaorui Wang1, Yuansheng Huang1

  • 1College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China.

Journal of chemical information and modeling
|December 25, 2024
PubMed
概括
此摘要是机器生成的。

一个新的机器学习模型,分子酶相互作用 (MEI) 模型,准确地预测了酶基质关系. 这种计算工具增强了各个领域的酶研究,为现有方法提供了更高的性能.

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Defining Substrate Specificities for Lipase and Phospholipase Candidates
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Defining Substrate Specificities for Lipase and Phospholipase Candidates

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Modeling an Enzyme Active Site using Molecular Visualization Freeware

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相关实验视频

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Identification of Kinase-substrate Pairs Using High Throughput Screening

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Defining Substrate Specificities for Lipase and Phospholipase Candidates
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Defining Substrate Specificities for Lipase and Phospholipase Candidates

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科学领域:

  • 生物技术和生物信息学
  • 计算化学的计算化学
  • 酵素工程是什么? 酶工程是什么

背景情况:

  • 酶是重要的生物催化剂,在医学,化学和生物技术中具有广泛的应用.
  • 预测酶基质相互作用,特别是对于新型分子来说,是一个重大挑战.
  • 现有的计算方法提供了效率,但与实验方法相比,经常缺乏准确性.

研究的目的:

  • 开发一种高精度的计算模型,用于预测分子-酶相互作用.
  • 解决目前在预测酶基质特异性的方法的局限性.
  • 创建一个通用的工具,以推进酶研究和应用.

主要方法:

  • 介绍分子酶相互作用 (MEI) 模型,一种新的机器学习框架.
  • 原子环境数据和氨基酸序列特征的集成,使用层次神经网络中的注意力机制.
  • 对酶反应和酶序列的综合数据集进行培训和评估.

主要成果:

  • 与最先进的模型相比,MEI模型实现了更高的预测准确性 (至少6.7%更高) 和AUROC (8.5%更高).
  • 在不同质量和大小的数据集中展示了强大的概括能力.
  • 成功应用于预测CYP450相互作用和塑性降解 (准确率为90.5%),显示了适应性.

结论:

  • MEI模型在准确预测酶基质关系方面取得了重大进展.
  • 它的多功能性和高性能使其成为酶研究的基础工具,其潜在应用超出了最初的范围.
  • 该模型的知识转移能力有效地提高了其在各种生物和环境环境中的实用性.