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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...
Introduction to Enzymes01:22

Introduction to Enzymes

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 bind the substrates and convert them into products. Many enzymes also...
Introduction To Enzymes01:22

Introduction To Enzymes

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 bind the substrates and convert them into products. Many enzymes also...
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.
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...

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Multi-enzyme Screening Using a High-throughput Genetic Enzyme Screening System
08:10

Multi-enzyme Screening Using a High-throughput Genetic Enzyme Screening System

Published on: August 8, 2016

Engineering enzymes.

P Leslie Dutton1, Christopher C Moser

  • 1Johnson Research Foundation, Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, PA 19104, USA. dutton@mail.med.upenn.edu

Faraday Discussions
|February 17, 2011
PubMed
Summary
This summary is machine-generated.

Researchers are developing artificial enzymes inspired by nature. By understanding protein complexity, scientists can design novel catalysts for human benefit, moving beyond simple descriptions to engineering practical applications.

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Area of Science:

  • Bioinorganic chemistry
  • Biocatalysis
  • Protein engineering

Background:

  • Natural enzymes offer inspiration for artificial catalyst design.
  • Understanding enzyme mechanisms requires more than structural and mechanistic descriptions.
  • Protein complexity presents significant barriers to engineering artificial enzymes.

Purpose of the Study:

  • To explore the genetic and biological origins of protein complexity.
  • To demonstrate strategies for minimizing or overcoming protein complexity in artificial enzyme design.
  • To facilitate the creation of functional artificial proteins and catalysts.

Main Methods:

  • Analysis of natural enzyme mechanisms, including electron tunneling and redox catalysis.
  • Investigating strategies to circumvent protein complexity.
  • Designing artificial enzymes using simplified protein scaffolds.

Main Results:

  • Identified key challenges posed by protein complexity in bioinorganic catalysis.
  • Demonstrated approaches to manage and reduce the impact of protein complexity.
  • Showcased the potential for designing artificial enzymes from scratch in well-understood cases.

Conclusions:

  • Overcoming protein complexity is crucial for developing useful artificial catalysts.
  • An engineering understanding of enzyme mechanisms enables the design of functional artificial proteins.
  • Simplified protein scaffolds can be effectively utilized for de novo artificial enzyme design.