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Related Concept Videos

Proofreading01:31

Proofreading

Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore,  it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase Enzyme
Proofreading01:43

Proofreading

Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.Errors during Replication Are Corrected by the DNA Polymerase EnzymeGenomic DNA is synthesized in...
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

Updated: Jun 10, 2026

A Novel Saturation Mutagenesis Approach: Single Step Characterization of Regulatory Protein Binding Sites in RNA Using Phosphorothioates
11:49

A Novel Saturation Mutagenesis Approach: Single Step Characterization of Regulatory Protein Binding Sites in RNA Using Phosphorothioates

Published on: August 21, 2018

Fine-tuning enzyme activity through saturation mutagenesis.

Holly H Hogrefe1

  • 1Stratagene Products Division, Agilent Technologies, Inc, La Jolla, CA, USA. holly.hogrefe@agilent.com

Methods in Molecular Biology (Clifton, N.J.)
|August 3, 2010
PubMed
Summary

Codon saturation mutagenesis enables protein engineering by randomizing amino acids. A new kit offers a faster, one-day method for this powerful technique, simplifying enzyme activity analysis.

Area of Science:

  • Molecular Biology
  • Protein Engineering
  • Biotechnology

Background:

  • Codon saturation mutagenesis is key for understanding protein structure-function relationships and optimizing enzyme activity.
  • Traditional methods are time-consuming, involving multiple PCR and cloning steps.

Purpose of the Study:

  • To present an efficient one-day method for site-directed saturation mutagenesis using the QuikChange Multi Site-Directed Mutagenesis kit.
  • To demonstrate the kit's adaptability for randomizing one to three amino acids simultaneously.

Main Methods:

  • Utilizing the QuikChange Multi Site-Directed Mutagenesis kit for incorporating degenerate codons into plasmid DNA.
  • Adapting the kit, originally for point mutations, for saturation mutagenesis applications.
  • Employing polymerase-mediated primer extension reactions.

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In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity
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In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity

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A Protocol for Functional Assessment of Whole-Protein Saturation Mutagenesis Libraries Utilizing High-Throughput Sequencing
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A Protocol for Functional Assessment of Whole-Protein Saturation Mutagenesis Libraries Utilizing High-Throughput Sequencing

Published on: July 3, 2016

Related Experiment Videos

Last Updated: Jun 10, 2026

A Novel Saturation Mutagenesis Approach: Single Step Characterization of Regulatory Protein Binding Sites in RNA Using Phosphorothioates
11:49

A Novel Saturation Mutagenesis Approach: Single Step Characterization of Regulatory Protein Binding Sites in RNA Using Phosphorothioates

Published on: August 21, 2018

In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity
09:16

In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity

Published on: March 25, 2020

A Protocol for Functional Assessment of Whole-Protein Saturation Mutagenesis Libraries Utilizing High-Throughput Sequencing
11:36

A Protocol for Functional Assessment of Whole-Protein Saturation Mutagenesis Libraries Utilizing High-Throughput Sequencing

Published on: July 3, 2016

Main Results:

  • The QuikChange Multi kit enables a streamlined, one-day procedure for codon saturation mutagenesis.
  • The method efficiently introduces degenerate codons into double-stranded plasmid DNA.
  • The technique simplifies the screening of multiple amino acid substitutions.

Conclusions:

  • The QuikChange Multi kit provides an efficient and rapid alternative to traditional codon saturation mutagenesis methods.
  • This adapted method facilitates the exploration of protein diversity and enzyme engineering.
  • The simplified process aids in the analysis of structure-function relationships and enzyme optimization.