Cyclic Thymineless Death Significantly Increases Frequency of R-Plasmid Elimination

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Cyclic thymineless death significantly increases frequency of R-plasmid elimination.

Thymine starvation of Escherichia coli strain C600 thy (R46) eliminated the R plasmid at a frequency of 17%. This was increased fourfold, to 68%, after the same culture was subjected to an additional three cycles of growth followed by thymineless death.

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Thymineless death in Escherichia coli.

There is little doubt that thymine starvation af­ fects the DNA of thymine requiring bacteria1-5. However, the process of killing is fairly complicated and remains to be clarified. The genes responsible for the control of sensitivity to thymine starvation have not been identified, even though claims have been but forward for at least one gene6. Besides, whether the cells die when still in incub...

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Thymineless death, at the origin

Thymineless death (TLD) in bacteria has been a focus of research for decades. Nevertheless, the advances in the last 5 years, with Escherichia coli as the model organism, have been outstanding. Independent research groups have presented compelling results that establish that the initiation of chromosome replication under thymine starvation is a key element in the scenario of TLD. Here we review...

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ژورنال

عنوان ژورنال: Antimicrobial Agents and Chemotherapy

سال: 1977

ISSN: 0066-4804,1098-6596

DOI: 10.1128/aac.12.4.555