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DNA bipyrimidine photoproduct repair and transcriptional response of UV-C irradiated Bacillus subtilis

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Abstract

Vegetative wild-type and DNA repair-deficient (homologous recombination, recA and nucleotide excision repair, uvrB) Bacillus subtilis cells were exposed to UV-C radiation. Colony formation, DNA bipyrimidine photoproducts and gene expression were measured during cell recovery. Gene expression was measured after 60 min cell recovery where 50% (wild-type), 30% (recA) and 8% (uvrB), respectively, of the UV-C induced DNA photoproducts were repaired. We examined changes in the gene expression following UV exposure in wild-type and both repair-deficient strains. A set of known and unknown genes were found to be significantly up-regulated in wild-type B. subtilis cells, whereas no or lower gene induction was determined for both mutant strains. In addition, the possible roles of newly identified UV-responsive genes are discussed with respect to cellular recovery following exposure to UV irradiation.

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Acknowledgments

The authors thank Joerg Angermann and Ina Wagner for their excellent technical assistance during the DNA microarray experiments. These results will be included in the PhD thesis of Ralf Moeller.

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Correspondence to Ralf Moeller.

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Communicated by Jorge Membrillo-Hernández.

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Moeller, R., Stackebrandt, E., Douki, T. et al. DNA bipyrimidine photoproduct repair and transcriptional response of UV-C irradiated Bacillus subtilis . Arch Microbiol 188, 421–431 (2007). https://doi.org/10.1007/s00203-007-0263-4

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  • DOI: https://doi.org/10.1007/s00203-007-0263-4

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