Characterization of Photosynthetic Glycogen and α-Glucosidase from Thermophilic Cyanobacteria,Lyngbya-Phormidium-Plectonema Group B

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  • Fujimori Ken
    Course of Bioresource Science for Processing, The United Graduate School of Agricultural Sciences, Kagoshima University
  • Konishi Yotaro
    Department of Food and Nutrition, Faculty of Human Life Science, Osaka City University
  • Takahashi Noriko
    Department of Food and Nutrition, Faculty of Human Life Science, Osaka City University
  • Muthuvelan Bhaskaran
    Course of Bioresource Science for Processing, The United Graduate School of Agricultural Sciences, Kagoshima University

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タイトル別名
  • Characterization of Photosynthetic Glycogen and α-Glucosidase from Thermophilic Cyanobacteria, <i>Lyngbya-Phormidium-Plectonema</i> Group B
  • Characterization of Photosynthetic Glyc
  • Characterization of Photosynthetic Glycogen and &alpha;-Glucosidase from Thermophilic Cyanobacteria, <i>Lyngbya-Phormidium-Plectonema</i> Group B

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We harvested filamentous cyanobacteria from an alkaline hot spring (45-50°C, pH 8.5-9.0) in Kagoshima Prefecture, and identified it as Lyngbya-Phormidium-Plectonema (LPP) group B by morphological characteristics. From the TCA-soluble fraction of the LPP group B, we isolated glycogen with average chain length of 11 glucose units. The glycogen showed a similar iodine absorption spectrum to that ofrabbit liver glycogen. We also recognized the presence of the TCA-insoluble glycogen at about 48% of total glycogen, most of which was bound non-covalently to protein and showed similar iodine absorption spectrum to that of the TCA-soluble glycogen. We also found thermophilic and thermostable α-glucosidase with optimum pH 6.5 in this cyanobacteria.

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