Nucleotide Sequence and Transcriptional Analysis of the Flanking Region of the Gene (spb) for the trans-Acting Factor That Controls Light-Mediated Expression of the puf Operon in Rhodobacter sphaeroides
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概要
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We recently reported the existence of a trans-acting factor (SPB) in Rhodobacter sphaeroides that repressed the expression of the puf operon during illumination. SPB was somewhat homologous to HvrA of Rhodobacter capsulatus, but these proteins appear to have functionally different properties. We now report an analysis of the flanking region of spb in the genome of R. sphaeroides, and we show that spb is a positional counterpart of hvrA of R. capsulatus. The region directly downstream of spb was found to contain three genes, two of which were highly homologous to orf5 and ahcY in R. capsulatus. However, a gene corresponding to hvrB, which controls the expression of orf5 and ahcY in R. capsulatus, was absent in R. sphaeroides. The level of the transcript of ahcY did not change in cells grown under photosynthetic and by respiratory conditions. By contrast, orf5 was transcribed at a higher rate in photosynthetically grown cells under high-intensity light than under low-intensity light, indicating features of transcription different from those in R. capsulatus. A third gene, orf318, which was absent in the corresponding region of R. capsulatus, encoded an amino acid sequence that was significantly homologous to the consensus sequence of RfaI and RfaJ of E. coli, which are glycosyl transferases involved in the synthesis of lipopolysaccharide. orf318 was transcribed in the opposite direction to ahcY, and at only a low level, under all conditions tested.
- 日本植物生理学会の論文
著者
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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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SHIRANO Yumiko
Mitsui Plant Biotechnology Research Institute
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Shioi Y
Mitsui Plant Biotechnology Research Institute
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Shioi Yuzo
Department Of Biological Sciences Faculty Of Bioscience And Biotechnology Tokyo Institute Of Technol
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Ohta Hiroyuki
Dept. Biol. Sci. Tokyo Inst. Technol.
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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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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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Shimada Hiroshi
Central Laboratory of Key Technology, Kirin Brewery Co.
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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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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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Takamiya Ken-ichiro
Department Of Biological Sciences Faculty Of Bioscience And Biotechnology
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Shioi Yuzo
Department Of Biological Science Faculty Of Science Shizuoka University
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Shimada Hiroshi
Central Fisheries Res. Inst. Hokkaido Res. Organization Hokkaido Jpn
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