微生物のエンドグリコシダーゼを用いた生理活性複合糖質の化学-酵素合成 Chemo-enzymatic Syntheses of Bioactive Glycoconjugates Using Microbial Endoglycosidase

この論文にアクセスする

この論文をさがす

著者

抄録

Endo-β-N-acetylglucosaminidase (endo-β-GlcNAc-ase) is a unique endoglycosidase that hydrolytically cleaves the N, N′-diacetylchitobiose moiety of asparagine-linked oligosaccharides of various glycoproteins. A novel endo-β-GlcNAc-ase in the culture fluid of Mucor hiemalis isolated from soil was found to have transglycosylation activity. This endo-β-GlcNAc-ase, Endo-M, couldtransfer the intact complex-type oligosaccharide from glycopeptide to suitable acceptors with an Nacetylglucosamine (GlcNAc) residue during hydrolysis of the glycopeptide. Using Endo-M, the chemo-enzymatic synthesis of a bioactive glycopeptide by chemical synthesis of N-acetylglucosaminyl peptide and enzymatic transfer of oligosaccharide was attempted. Peptide T can block HIV infection of human T cells. We added the sialo complex-type oligosaccharide to chemically synthesized N-acetylglucosaminyl Peptide T using the transglycosylation activity of Endo-M. The glycopeptide T thus produced showed a higher degree of resistance to protease digestion. We also prepared calcitonin glycopeptide by the chemo-enzymatic method described above. Calcitonin is a calcium-regulating hormone which is widely used in therapy for hyper calcemia. This glycopeptide demonstrated sufficient physiological activity. N-Acetylglucosaminyl glutamine was also a good glycoside acceptor of Endo-M. We were able to add oligosaccharides to the glutamine residues of Substance P neuropeptide and a-mating factor of yeast Saccharomyces cerevisiae using Endo-M. The glycosylated Substance P was biologically active and stable against peptidase digestion. On the other hand, the bioactivity of the glycosylated a-mating factor was lower than that of native one, although that of N-acetylglucosaminyl a-mating factor was higher. Using the transglycosylation activity of Endo-M, we prepared alkyl compound having oligosaccharide of glycoprotein. We used it as an antigen for preparing monoclonal antibody against oligosaccharide of glycoprotein.

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 48(2), 195-203, 2001-04-01

    The Japanese Society of Applied Glycoscience

参考文献:  22件中 1-22件 を表示

各種コード

  • NII論文ID(NAID)
    10008252685
  • NII書誌ID(NCID)
    AN10453916
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    13403494
  • NDL 記事登録ID
    5764904
  • 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  NDL  J-STAGE 
ページトップへ