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hupS and hupL constitute a transcription unit in the cyanobacterium Nostoc sp. PCC 73102

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Abstract.

The heterocystous cyanobacterium Nostoc sp. PCC 73102 possesses an uptake hydrogenase encoded by hupS and hupL. The genes are transcribed in cells grown under N2-fixing but not under non-N2-fixing conditions. We characterised the transcription of hupS and hupL in further detail. A transcription start site was located at a position 259 bp upstream from the hupS translation start. As shown by RT-PCR, hupS and hupL constitute a single transcript in Nostoc sp. PCC 73102. The possible function of short, tandemly repeated repetitive sequences between hupS and hupL, enabling a folding of the entire intergenic region into a hairpin, is discussed.

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Authors and Affiliations

  1. Department of Physiological Botany, EBC, Uppsala University, Villavägen 6, 752 36 Uppsala, Sweden, , , , ,

    P. Lindberg & P. Lindblad

  2. Molecular and Cellular Biophysics Research Unit, Medical Faculty of the Friedrich-Schiller University, Drackendorfer Strasse 1, 07747 Jena, Germany, , , , ,

    A. Hansel

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  1. P. Lindberg
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  2. A. Hansel
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  3. P. Lindblad
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Lindberg, P., Hansel, A. & Lindblad, P. hupS and hupL constitute a transcription unit in the cyanobacterium Nostoc sp. PCC 73102. Arch Microbiol 174, 129–133 (2000). https://doi.org/10.1007/s002030000186

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  • DOI: https://doi.org/10.1007/s002030000186

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