The pcsA gene is identical to dinD in Escherichia coli
| Autor: | Haruo Ohmori, T Fujii, M Saito, Takeshi Yasuda, Masaaki Wachi, Kazuo Nagai, Toshio Nagata |
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| Jazyk: | angličtina |
| Rok vydání: | 1995 |
| Předmět: |
Mutant
Molecular Sequence Data Mutagenesis (molecular biology technique) Biology medicine.disease_cause Microbiology Suppression Genetic Bacterial Proteins Sequence Homology Nucleic Acid medicine Escherichia coli Nucleoid Coding region SOS response Selection Genetic SOS Response Genetics Molecular Biology Gene Sequence Deletion Mutation Base Sequence Escherichia coli Proteins Genetic Complementation Test Chromosome Mapping Molecular biology Cold Temperature Rec A Recombinases Genes Bacterial Mutagenesis bacteria Research Article DNA Damage Plasmids |
| Popis: | The pcsA68 mutant of Escherichia coli is a cold-sensitive mutant which forms long filaments with a large nucleoid in the central region at 20 degrees C. We here show that (i) the coding region for the pcsA gene is identical with orfY located upstream of pyrE and can be deleted without loss of viability; (ii) pcsA is also identical to dinD, a DNA damage-inducible gene, whose expression is regulated by the LexA-RecA system; (iii) the cold-sensitive phenotype of the pcsA68 mutation is suppressed by delta recA or lexA1 (Ind-) mutation, but not by sulA inactivation; (iv) overproduction of PcsA68 leads to inhibition of cell growth in recA+ and delta recA strains at 20 and 37 degrees C, but PcsA+ does not show such an effect at any temperature; (v) SOS response is induced in the pcsA68 mutant cells at 20 degrees C. We discuss the possible function of the pcsA gene, comparing it with the sulA or the dif-xerCD function. We also describe a new method for gene disruption with positive and negative selection. |
| Databáze: | OpenAIRE |
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