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Related Concept Videos

Enzymes02:34

Enzymes

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...
Induced-fit Model01:13

Induced-fit Model

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 characteristics of...
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

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 a mild...
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

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 a mild...
Enzyme Kinetics01:19

Enzyme Kinetics

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...
Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

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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Related Experiment Video

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Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
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Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade

Published on: August 14, 2019

Polymeric model systems for flavoenzyme activity: towards synthetic flavoenzymes.

Brian J Jordan1, Graeme Cooke, James F Garety

  • 1Department of Chemistry, University of Massachusetts at Amherst, Amherst, MA 01003, USA.

Chemical Communications (Cambridge, England)
|March 16, 2007
PubMed
Summary

Researchers synthesized a water-soluble flavin polymer using atom transfer radical polymerization (ATRP). The polymer mimics flavoenzymes by using an oligoethylene glycol backbone for redox tuning and a hydrophobic flavin environment.

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Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
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Area of Science:

  • Polymer Chemistry
  • Biomimetic Chemistry
  • Materials Science

Background:

  • Flavin-containing enzymes are crucial biological catalysts.
  • Mimicking flavoenzyme active sites in synthetic materials is challenging.
  • Developing water-soluble polymers with tunable redox properties is of interest.

Purpose of the Study:

  • To synthesize a novel water-soluble flavin polymer.
  • To incorporate a flavin moiety with tunable redox properties.
  • To create a biomimetic material mimicking flavoenzyme prototypes.

Main Methods:

  • Atom Transfer Radical Polymerization (ATRP) was employed for polymer synthesis.
  • An oligoethylene glycol backbone was utilized.
  • Flavin groups were incorporated as functional moieties.

Main Results:

  • A water-soluble flavin polymer was successfully synthesized.
  • The oligoethylene glycol backbone provided a local hydrophobic environment.
  • The flavin moiety exhibited redox tuning characteristics, mimicking flavoenzymes.

Conclusions:

  • The synthesized polymer serves as a potential biomimetic prototype for flavoenzymes.
  • The material demonstrates tunable redox properties in a water-soluble format.
  • This work advances the design of functional polymeric materials for catalytic applications.