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Catalytically Perfect Enzymes

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.

Mechanical Protein Function

Mechanical Protein Function

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.

CRISPR

CRISPR

Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...

CRISPR

CRISPR

Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...

Allosteric Proteins-ATCase

Allosteric Proteins-ATCase

Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis pathway,...

Mechanical Protein Functions

Mechanical Protein Functions

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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Related Experiment Video

Updated: Jun 9, 2026

Engineering Adherent Bacteria by Creating a Single Synthetic Curli Operon

Engineering Adherent Bacteria by Creating a Single Synthetic Curli Operon

Published on: November 16, 2012

Hypocrea jecorina CEL6A protein engineering.

Suzanne E Lantz¹, Frits Goedegebuur, Ronald Hommes

¹Genencor Division, Danisco USA Inc,, 925 Page Mill Rd, Palo Alto, CA 94304, USA. suzanne.lantz@danisco.com.

Biotechnology for Biofuels

|September 9, 2010

Summary

Researchers engineered enzymes for efficient lignocellulose conversion to biofuels. Protein engineering of Trichoderma reesei cellobiohydrolases (CEL7A and CEL6A) improved thermostability and performance in enzyme systems.

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Engineering Cell-permeable Protein

Published on: December 28, 2009

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Last Updated: Jun 9, 2026

Engineering Adherent Bacteria by Creating a Single Synthetic Curli Operon

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Published on: November 16, 2012

Design and Construction of Artificial Extracellular Matrix (aECM) Proteins from Escherichia coli for Skin Tissue Engineering

Design and Construction of Artificial Extracellular Matrix (aECM) Proteins from Escherichia coli for Skin Tissue Engineering

Published on: June 11, 2015

Engineering Cell-permeable Protein

Engineering Cell-permeable Protein

Published on: December 28, 2009

Area of Science:

Biotechnology
Enzyme Engineering
Biofuels Production

Background:

Lignocellulose conversion to ethanol is a key biofuel technology.
Enzyme systems are critical for efficient lignocellulose breakdown.
Cost-effective enzyme production is essential for commercial viability.

Purpose of the Study:

To enhance the performance of Trichoderma reesei cellobiohydrolases (CEL7A and CEL6A) in enzyme systems.
To develop novel screening strategies for enzyme engineering.
To improve the thermostability and specific activity of key enzymes.

Main Methods:

Protein engineering of H. jecorina CEL7A and CEL6A.
Development of new screening tools and strategies.
Evaluation of enzyme variants under industrially relevant conditions.

Main Results:

Engineered CEL7A and CEL6A variants exhibited improved thermostability (Tm > 70°C).
Enhanced enzyme performance was achieved in the context of a complete enzyme system.
Focus on engineering CEL6A yielded significant advancements.

Conclusions:

Protein engineering can significantly improve enzyme function for lignocellulose conversion.
Advanced screening methods are crucial for optimizing enzyme systems.
Engineered enzymes show promise for cost-effective biofuel production.