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Introduction to Mechanisms of Enzyme Catalysis01:13

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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...
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Catalytically Perfect Enzymes01:07

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The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
 
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Enzyme Kinetics01:19

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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.
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Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force. 
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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.
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Multi-enzyme Screening Using a High-throughput Genetic Enzyme Screening System
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机械驱动的酶工程:超越化学的新前沿

Tingting Li1, Siyao Zhang1, Yun Fan1

  • 1Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM) & School of Flexible Electronics (future Technologies), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.

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概括

机械力量通过改变酶结构和通过包装在多孔材料中来增强酶活性和稳定性. 这种方法克服了传统酶应用的局限性,提高了生物催化剂的性能.

关键词:
封装的封装方式酶活性的酶活动.酶构成的合方式酶的稳定性 酶的稳定性酶是一种酶.机械化学 机械化学有孔的材料是多孔的材料.

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科学领域:

  • 生物催化剂是一种生物催化剂.
  • 材料科学 材料科学 材料科学
  • 生物技术是生物技术.

背景情况:

  • 酶提供高效率和特异性,但在恶劣条件下遭受不稳定.
  • 有限的回收和可重复使用性阻碍了实际的酶应用.
  • 开发增强酶活性和稳定性的策略至关重要.

研究的目的:

  • 审查酶活动的机械调节方面的进展.
  • 讨论在多孔材料中的机械辅助酶封装.
  • 确定酶机械生物学中的挑战和未来研究方向.

主要方法:

  • 使用机械力 (超声波,剪切,拉伸) 调节酶构造和基质结合.
  • 在多孔材料 (MOF,COF,多孔) 中封装酶,以提高稳定性.
  • 系统审查最近关于酶学中的机械力应用的文献.

主要成果:

  • 机械力量可以提高催化性能,并防止在不利条件下停用.
  • 酶封装在多孔矩阵中创建了一个保护性的微环境,增强稳定性.
  • 机械辅助策略为酶提供了更广泛的应用前景.

结论:

  • 机械力是酶工程的一个有前途的策略.
  • 酶@多孔材料系统显示了改善生物催化剂的潜力.
  • 需要进一步的研究来理解机制并优化材料-酶接口.