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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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In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity
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Recent advances in structure-based enzyme engineering for functional reconstruction.

Shen-Yuan Xu1,2,3, Lei Zhou1,2,3, Ying Xu1,2,3

  • 1Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang, People's Republic of China.

Biotechnology and Bioengineering
|August 28, 2023
PubMed
Summary
This summary is machine-generated.

Enzyme engineering uses structural information to improve enzyme function by mutating specific amino acids. Targeting key regions like the active center enhances enzyme activity, stereoselectivity, and thermostability.

Keywords:
biocatalysiscatalytic performanceenzyme engineeringenzyme structurerational designstructure-function relationship

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Enzyme Engineering

Background:

  • Enzyme engineering aims to enhance catalytic performance, including activity, stereoselectivity, and thermostability.
  • Structure-based design relies on understanding enzyme structure-function relationships for effective engineering.

Purpose of the Study:

  • To summarize mutations in specific enzyme regions for fine-tuning catalytic performance.
  • To discuss the impact of local structural environment alterations on enzyme functions.
  • To provide guidance on leveraging structural information for enzyme engineering.

Main Methods:

  • Review of mutations in active centers, access tunnels, and flexible loops.
  • Analysis of structure-function relationships in enzyme engineering.
  • Discussion of recent advancements in structure-based enzyme engineering approaches.

Main Results:

  • Mutations in specific regions like the active center, access tunnels, and flexible loops can significantly alter enzyme properties.
  • Modifying the local structural environment impacts enzyme function and performance.
  • Structure-based approaches offer effective strategies for enzyme optimization.

Conclusions:

  • Structural information is crucial for rational enzyme engineering.
  • Targeting specific residues and regions based on structural insights enables enhanced enzyme functionality.
  • Continued progress in structure-based methods will advance enzyme engineering capabilities.