Growth, Pigmentation, and Expression of the puf and puc Operons in a Light-Responding-Repressor (SPB)-Disrupted Rhodobacter sphaeroides
スポンサーリンク
概要
- 論文の詳細を見る
We previously cloned a trans-repressor, SPB, for the puf operon of Rhodobacter sphaeroides (Shimada et al.1996) and revealed that SPB was a putative genetic counterpart to HvrA in Rhodobacter capsulatus, a trans-activator for the puf and puh operons (Mizoguchi et al.1997). In this study we constructed a spb-disrupted R.sphaeroides, strain L-7, to elucidate the function of SPB. This disruption of the spb gene increased the photosynthetic growth rate and the cellular levels of photopigments under low-intensity light conditions. The disruption also derepressed the expression of the puf and puc operons under high-intensity light conditions. In strain L-7, however, strong illumination still reduced the cellular levels of photopigments as it did in the wild strain, suggesting that SPB did not directly affect the formation of photopigments. These results support our previous suggestion that SPB functions as a high-light repressor for puf operon in R.sphaeroides in striking contrast to HvrA, which is a low-light activator for puf and puh operons in R.capsulatus, even though SPB and HvrA are highly homologous. Disruption of spb gene had no effect on the oxygen-mediated regulation of the pigmentation or the expression of puf and puc operons.
- 日本植物生理学会の論文
著者
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SHIMADA Hiroshi
Department of Cardiology, Yokohama-Minami Kyosai Hospital
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MIZOGUCHI Hiroshi
Department of Information and Computer Sciences, Saitama University
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Shimada Hiroshi
Third Department Of Internal Medicine
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高部 圭司
京都大学大学院農学研究科
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Ohta Hiroyuki
Dept. Biol. Sci. Tokyo Inst. Technol.
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Masuda T
Department Of Biological Sciences Graduate School Of Bioscience And Biotechnology Tokyo Institute Of
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OHTA HIROYUKI
Department of Bioresource Science, College of Agriculture, Ibaraki University
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Nishimura Kohji
Department of Biological Sciences, Faculty of Bioscience and Biotechnology, Tokyo Institute of Techn
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Masuda Tatsuru
Department of Biological Sciences, Faculty of Bioscience and Biotechnology, Tokyo Institute of Techn
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Takamiya Ken-ichiro
Department of Biological Sciences, Faculty of Bioscience and Biotechnology, Tokyo Institute of Techn
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Nishimura Kohji
Dept. Biol. Sci. Tokyo Inst. Technol.
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Shimada Hiroshi
Department Of Biological Sciences Graduate School Of Bioscience And Biotechnology Tokyo Institute Of
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Takamiya Ken-ichiro
Department Of Biological Sciences Faculty Of Bioscience And Biotechnology Tokyo Institute Of Technol
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Masuda Tatsuru
Department Of Biological Sciences Graduate School Of Bioscience And Biotechnology Tokyo Institute Of
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Ohta Hiroyuki
Department Of Biological Sciences Graduate School Of Bioscience And Biotechnology Tokyo Institute Of
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Mizoguchi Hiroshi
Department Of Biological Sciences Faculty Of Bioscience And Biotechnology Tokyo Institute Of Technol
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Sekido Hitoshi
Department Of Gastroenterological Surgery Yokohama City University Graduate School Of Medicine
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Hatanaka Shigeyasu
Department of Biological Sciences, Faculty of Bioscience and Biotechnology, Tokyo Institute of Techn
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Shimada Hiroshi
Department Of Biological Sciences Tokyo Institute Of Technology
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Shimada H
Department Of Gastroenterological Surgery Yokohama City University Postgraduate School Of Medicine
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Hatanaka Shigeyasu
Department Of Biological Sciences Faculty Of Bioscience And Biotechnology Tokyo Institute Of Technol
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Takamiya Ken-ichiro
Department Of Biological Sciences Faculty Of Bioscience And Biotechnology
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Shimada Hiroshi
Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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