Nitrogen Fixation Genes and Nitrogenase Activity of the Non-Heterocystous Cyanobacterium <i>Thermoleptolyngbya</i> sp. O-77

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  • Yoon Ki-Seok
    International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Center for Small Molecule Energy, Kyushu University
  • Nguyen Nga T.
    International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University
  • Tran Kien Trung
    Center for Small Molecule Energy, Kyushu University Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
  • Tsuji Kohsei
    Center for Small Molecule Energy, Kyushu University Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
  • Ogo Seiji
    International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Center for Small Molecule Energy, Kyushu University Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University

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Other Title
  • Nitrogen Fixation Genes and Nitrogenase Activity of the Non-Heterocystous Cyanobacterium Thermoleptolyngbya sp. O-77

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Abstract

<p>Cyanobacteria are widely distributed in marine, aquatic, and terrestrial ecosystems, and play an important role in the global nitrogen cycle. In the present study, we examined the genome sequence of the thermophilic non-heterocystous N2-fixing cyanobacterium, Thermoleptolyngbya sp. O-77 (formerly known as Leptolyngbya sp. O-77) and characterized its nitrogenase activity. The genome of this cyanobacterial strain O-77 consists of a single chromosome containing a nitrogen fixation gene cluster. A phylogenetic analysis indicated that the NifH amino acid sequence from strain O-77 was clustered with those from a group of mesophilic species: the highest identity was found in Leptolyngbya sp. KIOST-1 (97.9% sequence identity). The nitrogenase activity of O-77 cells was dependent on illumination, whereas a high intensity of light of 40 μmol m−2 s−1 suppressed the effects of illumination.</p>

Journal

  • Microbes and Environments

    Microbes and Environments 32 (4), 324-329, 2017

    Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions / Japanese Society for Extremophiles

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