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Literature DB >> 799245

Hyper-recombination in dam mutants of Escherichia coli K-12.

Abstract

F-prime heterogenotes of dam-3 bacteria segregate F-prime homogenotes at a frequency 30-200 times higher than the isogenic dam+ strain. A hyperrecombination mutant which shows increased recombination between chromosomal duplications was characterized as a dam mutant. The dam-3 allele causes a reduction in linkage of proximal unselected markers in transconjugants and increases the recombination frequency between a pair of closely linked markers. It is concluded that dam mutations confer a hyperrecombination phenotype to the cell.

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Year: 1976 PMID： 799245 DOI： 10.1007/bf00268528

Source DB: PubMed Journal: Mol Gen Genet ISSN： 0026-8925

9 in total

38 in total

5. Viability of Escherichia coli K-12 DNA adenine methylase (dam) mutants requires increased expression of specific genes in the SOS regulon.

Authors: K R Peterson; K F Wertman; D W Mount; M G Marinus
Journal: Mol Gen Genet Date: 1985

Hyper-recombination in dam mutants of Escherichia coli K-12.

1. ISOLATION AND CHARACTERIZATION OF RECOMBINATION-DEFICIENT MUTANTS OF ESCHERICHIA COLI K12.

2. Hybridization between Escherichia coli and Shigella.

3. Pleiotropic effects of a DNA adenine methylation mutation (dam-3) in Escherichia coli K12.

4. Mutants of Escherichia coli requiring methionine or vitamin B12.

Review 5. Recalibrated linkage map of Escherichia coli K-12.

6. Biological function for 6-methyladenine residues in the DNA of Escherichia coli K12.

Review 7. Escherichia coli K-12 F-prime factors, old and new.

8. Location of DNA methylation genes on the Escherichia coli K-12 genetic map.

9. Isolation of deoxyribonucleic acid methylase mutants of Escherichia coli K-12.

1. Recombination is essential for viability of an Escherichia coli dam (DNA adenine methyltransferase) mutant.

Review 2. Evidence that adenine methylation influences DNA-protein interactions in Escherichia coli.

3. DNA adenine methylase mutants of Salmonella typhimurium and a novel dam-regulated locus.

Review 4. Heteroduplex deoxyribonucleic acid base mismatch repair in bacteria.

5. Viability of Escherichia coli K-12 DNA adenine methylase (dam) mutants requires increased expression of specific genes in the SOS regulon.

Review 6. Homologous recombination in procaryotes.

7. Relationships between a hyper-rec mutation (REM1) and other recombination and repair genes in yeast.

8. Induced mutagenesis in dam- mutants of Escherichia coli: a role for 6-methyladenine residues in mutation avoidance.

9. Recombinant levels of Escherichia coli K-12 mutants deficient in various replication, recombination, or repair genes.

Review 10. The evolution of small DNA viruses of eukaryotes: past and present considerations.