Mutations in the bglY gene increase the frequency of spontaneous deletions in Escherichia coli K-12.
A strong mutator effect has been observed in Escherichia coli K-12 strains mutated in the bglY gene (27 min). The frequency of point mutations is not modified in bglY mutant strains. In contrast, a strong increase in spontaneous generation of large deletions has been observed in these strains, both for chromosomal markers (10-fold increase of galETK-chlA deletions and 100-fold increase of ptsI-cysK deletions) and for plasmid DNA (100-fold increase of large deletions in the region located upstream of the chloramphenicol-resistance gene in plasmid pGR71). bglY mutations are recessive and can be complemented by a DNA fragment of 900 base pairs assumed to contain the entire bglY wild-type gene. This mutator effect is recA-independent.
Lejeune
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Unité Régulation de l'Expression Génétique, Institut Pasteur, Paris, France.
Danchin
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A
D002872:Chromosome Deletion; D004269:DNA, Bacterial / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics*; D005798:Genes, Bacterial; D005838:Genotype; D009154:Mutation; D010957:Plasmids; D015183:Restriction Mapping
D004269:DNA, Bacterial