Biological effects of DNA damage in the hyperthermophilic archaeon Sulfolobus acidocaldarius - PubMed (original) (raw)

Biological effects of DNA damage in the hyperthermophilic archaeon Sulfolobus acidocaldarius

Michelle S Reilly et al. FEMS Microbiol Lett. 2002.

Abstract

To investigate the generality of efficient double-strand break repair and damage-induced mutagenesis in hyperthermophilic archaea, we systematically measured the effects of five DNA-damaging agents on Sulfolobus acidocaldarius and compared the results to those obtained for Escherichia coli under corresponding conditions. The observed lethality of gamma-radiation was very similar for S. acidocaldarius and E. coli, arguing against unusually efficient double-strand break repair in S. acidocaldarius. In addition, DNA-strand-breaking agents (gamma-radiation or bleomycin), as well as DNA-cross-linking agents (mechlorethamine, butadiene diepoxide or cisplatin) stimulated forward mutation, reverse mutation, and formation of recombinants via conjugation in Sulfolobus cells. Although two of the five DNA-damaging agents failed to revert the E. coli auxotrophs under these conditions, all five reverted S. acidocaldarius auxotrophs.

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