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Updated: Nov 15, 2025

Site-Directed Mutagenesis for In Vitro and In Vivo Experiments Exemplified with RNA Interactions in Escherichia Coli

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Published on: February 5, 2019

High-throughput Site-directed Scanning Mutagenesis Using a Two-fragment PCR Approach.

Franziska M Heydenreich¹, Tamara Miljuš^2,3, Dalibor Milić⁴

¹Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA.

|March 3, 2021

Summary

This summary is machine-generated.

This study introduces a high-throughput mutagenesis protocol using a two-fragment PCR approach to reduce artifacts and increase efficiency in creating protein mutant libraries. The method facilitates the creation of large alanine-scanning libraries for protein engineering and functional studies.

Keywords:

Gibson assembly High throughput mutagenesis Scanning mutagenesis Site-directed Two-fragment PCR

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Last Updated: Nov 15, 2025

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Homemade Site Directed Mutagenesis of Whole Plasmids

Homemade Site Directed Mutagenesis of Whole Plasmids

Published on: May 11, 2009

Area of Science:

Molecular Biology
Protein Engineering
Biotechnology

Background:

Site-directed scanning mutagenesis is crucial for studying protein function and engineering novel protein properties.
Generating large mutant libraries is challenging due to cost and technical demands.
Existing protocols often suffer from PCR artifacts, reducing efficiency.

Purpose of the Study:

To develop a high-throughput, efficient, and cost-effective protocol for site-directed mutagenesis.
To minimize PCR artifacts commonly encountered in traditional mutagenesis methods.
To facilitate the creation of comprehensive protein mutant libraries for research.

Main Methods:

A novel two-fragment PCR approach was implemented, separating mutagenic primers into distinct PCR reactions.
Linear DNA fragments encoding mutations were generated and subsequently joined using Gibson assembly.
A free software tool was developed for high-throughput primer design and sequencing data analysis.

Main Results:

The two-fragment PCR strategy significantly reduced PCR artifacts compared to conventional methods.
Overall cloning efficiency was substantially increased.
The protocol enabled the efficient generation of alanine-scanning libraries with up to 400 single-point mutations and complete sequence coverage.

Conclusions:

The developed high-throughput mutagenesis protocol offers an efficient and reliable method for generating large mutant libraries.
This approach overcomes limitations of traditional methods, improving success rates in protein engineering and functional studies.
The integrated software tool further streamlines the process of library creation and analysis.