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The Escherichia coli lacZ reversion mutagenicity assay
1Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry and Biochemistry, University of Guelph, N1G 2W1, Guelph, Ontario, Canada. josephy@chembio.uoguelph.ca
Mutation Research
|December 13, 2000
Summary
The Escherichia coli lacZ reversion assay is a powerful tool for studying mutagenesis. This review details its development, applications, and protocols for analyzing specific mutations.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Background:
- The Escherichia coli lacZ reversion assay utilizes engineered episomal lacZ alleles.
- This system allows for the study of mutagenesis and mutational specificity.
- Each strain is designed to revert via a specific base substitution or frameshift event.
Purpose of the Study:
- To review the development and modifications of the Escherichia coli lacZ reversion assay.
- To present examples of the assay's applications in mutagenesis research.
- To provide detailed protocols for implementing the lacZ reversion assay.
Main Methods:
- Utilizing a set of episomal lacZ alleles.
- Selecting revertants through growth on lactose minimal medium.
- Analyzing specific base substitution or frameshift events.
Main Results:
- The lacZ reversion assay provides an attractive system for mutagenesis studies.
- The assay enables detailed analysis of mutational specificity.
- Modifications and improvements have enhanced the assay's utility.
Conclusions:
- The Escherichia coli lacZ reversion assay is a valuable and versatile tool.
- The assay facilitates precise investigation of mutation mechanisms.
- Detailed protocols ensure reproducible and effective application of the assay.