Cloning and Characterization of High-CO_2-Specific cDNAs from a Marine Microalga, Chlorococcum littorale, and Effect of CO_2 Concentration and Iron Deficiency on the Gene Expression
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概要
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Two cDNA clones exclusively induced under an extremely high-CO_2 concentration (20%) were isolated from Chlorococcum littorale by differential screening and named HCR (high-CO_2 response) 1 and 2, respectively. The amino acid sequence of the protein encoded by HCR2 exhibited homology to the gp91-phox protein, a critical component of a human phagocyte oxidoreductase, and to the yeast ferric reductases, Saccharomyces cerevisiae FRE1 and FRE2 and Schizosaccharomyces pombe Frp1. The induction of both HCR mRNAs required extremely high-CO_2 conditions and iron deficiency, being suppressed under air conditions and by iron sufficiency, suggesting that the expression of the these two HCR genes required extremely high-CO_2 conditions and iron deficiency in combination. The HCR2 protein was detected in the membrane fractions of cells grown under conditions which would favor the induction of HCR2-mRNA and the protein level was lowered when the cells were transferred from iron deficient to 10 μM FeSO_4 conditions (with 20% CO_2).
- 日本植物生理学会の論文
著者
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Sasaki T
Ajinomoto Co.
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Sasaki Takuji
Rgp Niar
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Miyachi S
Marine Biotechnology Inst. Kamaishi Lab. Iwate Jpn
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KURANO NORIHIDE
Marine Biotechnology Institute, Kamaishi Laboratories
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MIYACHI SHIGETOH
Marine Biotechnology Institute
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Kurano Norihide
Marine Biotech. Inst.:kamaishi Labs.:shimizu Labs.
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Kurano N
Marine Biotechnology Inst. Kamaishi Lab. Iwate Jpn
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Sasaki Takaaki
Ajinomoto Co.
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Sasaki T
Rgp Niar
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Sasaki Takayuki
Marine Biotechnology Institute, Kamaishi Laboratories
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Kurano N
Osaka Municipal Technical Research Institute
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Miyachi Sigetoh
Marine Biotechnology Institute Kamaishi Laboratories
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Miyachi Shigetoh
Marine Biotechnology Inst.
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