Identification of the Functional Periplasmic Nitrate Reductase (nap) Gene Cluster from the Deep-Sea Denitrifier Pseudomonas sp. Strain MT-1
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概要
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The nap gene cluster encoding periplasmic nitrate reductase was identified from Pseudomonas sp. strain MT-1, a deep-sea denitrifier isolated from the Mariana Trench. The ORFs identified were highly homologous with those of Pseudomonas stutzeri, but the cluster included only four ORFs (napDABC), less than those in other organisms. For other bacteria, some additional small ORFs (such as napE, napF, napG, napH, and napK) are found in the nap gene cluster, although their physiological function is still unclear. The soluble fraction of MT-1 grown under denitrifying condition showed significant nitrate reductase activity. This observation suggests that the periplasmic nitrate reductase encoded by the gene cluster identified in this study is functional. The activity was highest when the organism was grown under denitrifying conditions, suggesting that the enzyme participates in dissimilatory nitrite reduction.
- 2007-08-23
著者
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Tamegai Hideyuki
Department of Chemistry, College of Humanities and Sciences, Nihon University
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Kawano H
Extremobiosphere Research Center (xbr) Japan Agency For Marine-earth Science And Technology (jamstec
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Kato C
Extremobiosphere Research Center (xbr) Japan Agency For Marine-earth Science And Technology (jamstec
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Kato C
Extremobiosphere Research Center Jamstec
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Ikeda Eriko
Department of Chemistry, College of Humanities and Sciences, Nihon University
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HORIKOSHI Koki
Extremobiosphere Research Center, Japan Agency for Marine-Earth Science and Technology
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Horikoshi K
Extremobiosphere Res. Center (xbr) Japan Agency For Marine-earth Sci. And Technol. (jamstec)
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Kato Chiaki
Extremobiosphere Res. Center Japan Agency For Marine-earth Sci. And Technol.
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Tamegai Hideyuki
Department Of Chemistry College Of Humanities And Sciences Nihon University
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Ikeda Eriko
Department Of Chemistry College Of Humanities And Sciences Nihon University
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Kato Chiaki
Marine Biodiversity Research Program Japan Marine Science And Technology Center (jamstec)
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Horikoshi Koki
Extremobiosphere Research Center Japan Agency For Marine-earth Science And Technology (jamstec)
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HORIKOSHI Koki
Extremobiosphere Research Center (XBR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
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