Tandem arrangement of photolyase and superoxide dismutase genes in Halobacterium halobium - PubMed (original) (raw)

Comparative Study

Tandem arrangement of photolyase and superoxide dismutase genes in Halobacterium halobium

M Takao et al. J Bacteriol. 1989 Nov.

Abstract

A DNA fragment containing the photolyase gene was cloned from Halobacterium halobium. The deduced amino acid sequence is highly similar to those of four known photolyases from eubacteria and a eucaryote. The cloned gene expressed in Escherichia coli increased the survival of UV-irradiated host cells by photoreactivation. These results indicate that photolyases of eucaryotes, eubacteria, and archaebacteria are derived from a common origin. In this cloned DNA fragment, two additional open reading frames (ORFs), ORF 151 and ORF 200, were found in the 5' and 3' adjacent flanking regions of the photolyase gene. ORF 200 shows unequivocal amino acid sequence homology to all known manganese and iron superoxide dismutases. Northern (RNA) hybridization analysis of H. halobium RNA revealed the existence of three transcripts, one of which covered all three ORFs, indicating that photolyase and superoxide dismutase are partly cotranscribed in this bacterium.

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References

    1. J Biol Chem. 1987 Jul 15;262(20):9724-9 - PubMed
    1. Biochim Biophys Acta. 1983 Jan 20;739(1):73-8 - PubMed
    1. Eur J Biochem. 1988 May 2;173(3):473-82 - PubMed
    1. Biochim Biophys Acta. 1989 Jan 27;990(1):80-6 - PubMed
    1. FEBS Lett. 1988 Mar 14;229(2):377-82 - PubMed

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