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Updated: Aug 15, 2026
11:58
Linear Amplification Mediated PCR – Localization of Genetic Elements and Characterization of Unknown Flanking DNA
Published on: June 25, 2014
Targeted linearization of DNA in vivo
1Department of Molecular Biology and Oncology, University of Texas Southwestern Medical Center at Dallas, 6000 Harry Hines Boulevard, Dallas, Texas 75235-9140, USA.
Methods (San Diego, Calif.)
|March 17, 1999
Summary
This study presents a novel method for precisely cutting DNA at any chosen site in vivo using engineered yeast homothallic switching endonuclease (HO endo). This technique enables detailed analysis of chromosome structure and function in eukaryotes.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Site-specific DNA cleavage using endonucleases is crucial for studying eukaryotic chromosome dynamics.
- Existing methods have limitations in targeting specific chromosomal locations for analysis.
Purpose of the Study:
- To develop a versatile method for in vivo chromosomal linearization at any predefined position.
- To enable precise genetic manipulation and functional studies of chromosomes.
Main Methods:
- Utilizing the yeast homothallic switching endonuclease (HO endo) with its distinct nuclease and DNA-binding domains.
- Engineering chimeric nucleases with altered DNA recognition sites.
- Controlling nuclease expression via an inducible promoter.
- Introducing specific cut sites into the yeast genome using homologous recombination.
Main Results:
- Demonstrated successful linearization of chromosomes at user-defined locations in vivo.
- Showcased the flexibility of the engineered HO endo system for targeting diverse genomic sites.
- Validated the applicability of the method in yeast and potential for other biological systems.
Conclusions:
- The described method provides a powerful tool for precise chromosomal DNA cleavage in vivo.
- This approach significantly advances the study of chromosome structure, replication, transcription, recombination, and repair.
- The engineered endonuclease system offers broad applications in eukaryotic genetics and molecular biology.
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