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Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

10.5K
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...
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Factors Influencing Microbial Growth: Temperature01:27

Factors Influencing Microbial Growth: Temperature

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Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
1.1K
Enzyme Kinetics01:19

Enzyme Kinetics

103.7K
Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction.
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
103.7K
Temperature Dependence on Reaction Rate02:55

Temperature Dependence on Reaction Rate

88.5K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
88.5K
Diversity of Archaea IV01:29

Diversity of Archaea IV

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Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
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Effect of Temperature Change on Reaction Rate02:28

Effect of Temperature Change on Reaction Rate

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The Arrhenius equation,
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相关实验视频

Updated: Jan 16, 2026

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes
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A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes

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从序列段的角度建模酶温度稳定性

Ziqi Zhang1, Shiheng Chen2, Runze Yang3,4

  • 1School of Artificial Intelligence and Computer Science, Jiangnan University, Wuxi, Jiangsu 214122, China.

Journal of chemical information and modeling
|October 1, 2025
PubMed
概括
此摘要是机器生成的。

我们开发了一个新的深度学习模型,分段变压器,以预测酶温度稳定性,克服数据限制. 该模型准确地预测了热性质,有助于工业应用的酶工程.

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Measuring Enzymatic Stability by Isothermal Titration Calorimetry
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Measuring Enzymatic Stability by Isothermal Titration Calorimetry

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How to Stabilize Protein: Stability Screens for Thermal Shift Assays and Nano Differential Scanning Fluorimetry in the Virus-X Project
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How to Stabilize Protein: Stability Screens for Thermal Shift Assays and Nano Differential Scanning Fluorimetry in the Virus-X Project

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相关实验视频

Last Updated: Jan 16, 2026

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes
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A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes

Published on: November 7, 2012

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Measuring Enzymatic Stability by Isothermal Titration Calorimetry
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Measuring Enzymatic Stability by Isothermal Titration Calorimetry

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How to Stabilize Protein: Stability Screens for Thermal Shift Assays and Nano Differential Scanning Fluorimetry in the Virus-X Project
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How to Stabilize Protein: Stability Screens for Thermal Shift Assays and Nano Differential Scanning Fluorimetry in the Virus-X Project

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科学领域:

  • 生物化学 生物化学
  • 计算生物学 计算生物学
  • 蛋白质工程是指蛋白质工程.

背景情况:

  • 酶的热稳定性对于工业和研究应用至关重要.
  • 确定酶热性质的实验方法是资源密集的.
  • 由于数据有限且不平衡,现有的计算模型面临着挑战.

研究的目的:

  • 为 benchmarking 酶热建模创建一个精选的数据集.
  • 开发一种高效准确的深度学习框架,用于预测酶温度稳定性.
  • 为了证明该模型在指导酶工程工作中的实用性.

主要方法:

  • 策划了一套用于酶温度稳定的新型数据集.
  • 开发了分段变压器,这是一种使用分段级蛋白质序列表示的深度学习模型.
  • 使用RMSE,MAE,Pearson和Spearman相关性评估模型性能.

主要成果:

  • 分段变压器在预测酶温度稳定性方面取得了最先进的性能.
  • 该模型证明了细分级特征在热行为预测中的重要性.
  • 通过使用17种突变,设计了一种带有1.64倍热处理活性改善的丁酶.

结论:

  • 分段变压器提供了一种高效和准确的方法来预测酶的热稳定性.
  • 开发的数据集和模型促进了酶热建模和工程方面的进步.
  • 该研究验证了该模型能够指导蛋白质工程以提高热稳定性的能力.