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Related Concept Videos

Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

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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.
 
Most enzymes...
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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...
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Enzyme Kinetics01:19

Enzyme Kinetics

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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.
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...
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Introduction to Enzyme Kinetics01:19

Introduction to Enzyme Kinetics

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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.
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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Enzymes02:34

Enzymes

88.8K
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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Introduction to Enzymes01:22

Introduction to Enzymes

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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...
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Related Experiment Video

Updated: Nov 23, 2025

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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Directed evolution for enzyme development in biocatalysis.

Serena Gargiulo1, Patrice Soumillion1

  • 1Louvain Institute of Biomolecular Science and Technology, Université catholique de Louvain, Place Croix du Sud 4-5, 1390 Louvain-la-Neuve, Belgium.

Current Opinion in Chemical Biology
|January 1, 2021
PubMed
Summary
This summary is machine-generated.

Directed evolution advances enzyme engineering for biocatalysis. Innovations in library design, assembly, and screening accelerate the development of industrial enzymes with tailored properties.

Keywords:
Cell displayEnzyme assayLibraryMicrodropletMicrofluidicsMutagenesisScreening

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Area of Science:

  • Biocatalysis and enzyme engineering
  • Chemical industry applications
  • Molecular biology techniques

Background:

  • Biocatalysis is crucial for the chemical industry, demanding enzymes with enhanced properties.
  • Directed evolution is the standard method for enzyme improvement through cycles of genetic modification and screening.
  • Continuous innovation is needed to meet the evolving demands for industrial enzymes.

Purpose of the Study:

  • To highlight recent developments in directed evolution for enzyme engineering.
  • To discuss advancements in library design, assembly, expression, and screening strategies.
  • To showcase the impact of these advancements on biocatalysis.

Main Methods:

  • Focused mutagenesis for designing 'smarter' genetic libraries.
  • Modern molecular biology techniques for library assembly and expression.
  • Diverse screening strategies, including low-throughput and ultra-high-throughput assays.

Main Results:

  • Focused mutagenesis enables faster and more successful enzyme engineering outcomes.
  • Advancements in molecular biology improve library construction and enzyme production.
  • Both low-throughput and ultra-high-throughput screening methods are effective for enzyme development.

Conclusions:

  • Recent developments in directed evolution significantly enhance enzyme engineering capabilities.
  • Strategic library design and advanced screening are key to developing next-generation industrial enzymes.
  • These advancements are vital for expanding the scope and efficiency of biocatalysis.