Characterization of Cellobiose Phosphorylase and Cellodextrin Phosphorylase (糖質関連酵素化学シンポジウム) Characterization of Cellobiose Phosphorylase and Cellodextrin Phosphorylase

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Two intracellular enzymes, cellobiose phosphorylase (CBP) and cellodextrin phosphorylase (CDP) are involved in the phosphorolytic pathway in cellulose degradation. Those enzymes are considered to be useful in syntheses of oligosaccharides because the reactions are reversible. CBP from Cellvibrio gilvus and Clostridium thermocellum YM4, and CDP from C. thermocellum YM4 were cloned and over-expressed in Escherichia coli. All the three enzymes showed ordered bi bi mechanism. However the orders of the substrate binding of the CBPs were different. It was found that CBP from C. gilvus strictly recognized the hydroxyl groups at positions β-1, 3, and 4 of the acceptor molecule in the reverse reaction. On the other hand, the recognition of the hydroxyl groups at positions 2 and 6 was not so strict. Three branched β-1, 4-glucosyl trisaccharides were synthesized by using the reverse reaction of C. gilvus CBP. A new substrate inhibition pattern, competitive substrate inhibition, was also found in the reverse reaction of CBP using glucose as the acceptor. Specific colorimetric quantification of cellobiose was designed by using the reaction of CBP. Cellobiose was produced from sucrose at 90% yield by a combined action of three enzymes including CBP.

収録刊行物

  • 応用糖質科学 : oyo toshitsu kagaku = Journal of applied glycoscience

    応用糖質科学 : oyo toshitsu kagaku = Journal of applied glycoscience 49(2), 221-227, 2002-04-01

    The Japanese Society of Applied Glycoscience

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各種コード

  • NII論文ID(NAID)
    10008253791
  • NII書誌ID(NCID)
    AN10453916
  • 本文言語コード
    ENG
  • 資料種別
    REV
  • ISSN
    13403494
  • NDL 記事登録ID
    6142508
  • NDL 雑誌分類
    ZP24(科学技術--化学・化学工業--糖・澱粉)
  • NDL 請求記号
    Z17-15
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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