Using lambda phage clones containing segments of the Escherichia coli K12 chromosome as hybridization probes, we found one gene at 42 min on the E. coli chromosome map, the expression of which was affected by RNase III. The sequence of the DNA fragment containing this gene (gen-165) revealed the pre
An essential gene of Escherichia coli that has sequence similarity to a chloroplast gene of unknown function
โ Scribed by Nagano, Yukio ;Matsuno, Ryuichi ;Sasaki, Yukiko
- Publisher
- Springer
- Year
- 1991
- Tongue
- English
- Weight
- 311 KB
- Volume
- 228
- Category
- Article
- ISSN
- 0026-8925
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โฆ Synopsis
The dedB gene of Escherichia coli has sequence similarity to the zfpA gene of the chloroplast chromosome. The functions of dedB and zfpA are unknown. We constructed derivatives of temperature-sensitive polA strains into whose chromosomes a plasmid containing the disrupted dedB gene was integrated by homologous recombination. These strains contained normal and disrupted dedB genes in their chromosomes. We then selected plasmid-segregated strains and found no cells containing the disrupted dedB gene, indicating that disruption of the dedB gene was lethal in polA strains of E. coli.
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