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Sequence homology in DNA molecules of temperate phages phi81, phi80 and lambda
Molecular & General Genetics : MGG
|February 27, 1978
Summary
Bacteriophage homology maps reveal shared genetic regions between phi81, phi80, and lambda phages. Recombination plays a key role in the evolutionary divergence of these lambdoid phages.
Area of Science:
- Molecular Biology
- Virology
- Genetics
Background:
- Bacteriophages are viruses that infect bacteria.
- Lambdoid phages share common structural and functional genes.
- Understanding phage homology aids in studying viral evolution and recombination.
Purpose of the Study:
- To construct homology maps between bacteriophages phi81, phi80, and lambda.
- To investigate the role of recombination in the divergence of lambdoid phages.
- To compare homology data with previously reported maps of related phages.
Main Methods:
- Construction of DNA heteroduplexes between bacteriophages phi81, phi80, and lambda.
- Analysis of heteroduplexes using electron microscopy to determine homologous regions.
- Comparison of generated homology maps with existing data from other lambdoid phages.
Main Results:
- High homology was observed in specific regions between phi81/phi80 and phi81/lambda heteroduplexes.
- Non-homologous regions, including early gene clusters, were identified.
- Scattered low-degree homologies were found in various gene clusters and regions.
Conclusions:
- The study establishes homology maps for phi81, phi80, and lambda phages.
- Findings suggest a phylogenetic relationship between phi81 and other lambdoid phages.
- Recombination is implicated as a significant factor in the evolutionary divergence of these phages.