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PubMed1991

uvrB-dependent, recF-independent post-replication (or replication) repair in Escherichia coli.

In UV-damaged cells, a large fraction of pyrimidine dimers may remain unexcised and may be tolerated by a uvrB recA lexA-dependent non-excisional mode of repair (M. Sedliaková, J. Brozmanová, F. Maŝek and K. Kleibl, Biophys. J., 36 (1981) 429-441). We show here that a similar repair pathway operates in the Escherichia coli recF 143 single mutant but not in the recF uvrB double mutant. This indicates that the putative repair pathway is recF independent.

Bacterial Proteins↗
PubMed2005

Replicative aging of the yeast does not require DNA replication.

Mating pheromone treatment resulting in shmoo formation is a physiologically relevant model for separation of cell growth and division processes in the yeast Saccharomyces cerevisiae. Using this attitude we demonstrate that yeast loses its capacity for division at a faster rate when engaged in intensive growth and metabolism without cell divisions (in the shmoo state) than during normal reproductive growth. These results suggest that limitation of the division potential in the yeast is not due to a counter of cell divisions but is of growth/metabolic nature, perhaps involving attaining a limitation of cell volume.

Aging↗