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ABSTRACT: Importance
Results presented in this study support the concept that the adverse metabolic conditions prevailing in nutritionally stressed bacteria activate an oxidative stress response that disturbs ribonucleotide reductase (RNR) levels. Such an alteration of RNR levels promotes mutagenic events that allow Bacillus subtilis to escape from growth-limited conditions.
SUBMITTER: Castro-Cerritos KV
PROVIDER: S-EPMC5287397 | biostudies-literature | 2017 Feb
REPOSITORIES: biostudies-literature
Castro-Cerritos Karla Viridiana KV Yasbin Ronald E RE Robleto Eduardo A EA Pedraza-Reyes Mario M
Journal of bacteriology 20170130 4
The Gram-positive microorganism Bacillus subtilis relies on a single class Ib ribonucleotide reductase (RNR) to generate 2'-deoxyribonucleotides (dNDPs) for DNA replication and repair. In this work, we investigated the influence of RNR levels on B. subtilis stationary-phase-associated mutagenesis (SPM). Since RNR is essential in this bacterium, we engineered a conditional mutant of strain B. subtilis YB955 (hisC952 metB5 leu427) in which expression of the nrdEF operon was modulated by isopropyl- ...[more]