Nitrogen fixation genes and nitrogenase activity of the non-heterocystous cyanobacterium Thermoleptolyngbya sp. O-77

Ki Seok Yoon, Nga T. Nguyen, Kien Trung Tran, Kohsei Tsuji, Seiji Ogo

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)324-329
    Number of pages6
    JournalMicrobes and environments
    Volume32
    Issue number4
    DOIs
    Publication statusPublished - 2017

    All Science Journal Classification (ASJC) codes

    • Ecology, Evolution, Behavior and Systematics
    • Soil Science
    • Plant Science

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