Purification and characterization of α-N-acetylgalactosaminidases 1 and 2 from the starfish Asterina amurensis

  • Harun-Or-RASHID Md.
    Department of Health Chemistry, Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences
  • MATSUZAWA Tomomi
    Department of Health Chemistry, Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences
  • SATOH Youichi
    Department of Health Chemistry, Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences
  • SHIRAISHI Takayuki
    Laboratory of Health Chemistry, Nihon Pharmaceutical University
  • ANDO Masayuki
    Department of Health Chemistry, Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences
  • SADIK Golam
    Department of Health Chemistry, Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences
  • UDA Yutaka
    Department of Health Chemistry, Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences

書誌事項

タイトル別名
  • Purification and Characterization of .ALPHA.-N-Acetylgalactosaminidases I and II from the Starfish Asterina amurensis
  • Purification and characterization of a N acetylgalactosaminidases 1 and 2 from the starfish Asterina amurensis
  • Purification and Characterization of α-<i>N</i>-Acetylgalactosaminidases I and II from the Starfish<i>Asterina amurensis</i>

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抄録

Two α-N-acetylgalactosaminidases, α-N-acetylgalactosaminidase (α-GalNAcase) I and II, were purified from the digestive organ of starfish. Purified α-GalNAcase I and II gave nearly single protein bands on SDS-polyacrylamide gel electrophoresis, individually. Even the final preparation of α-GalNAcase I contained α-galactosidase activity, while α-GalNAcase II was almost free from that activity with p-nitrophenyl and 4-methylumbelliferyl α-N-acetylgalactosaminides as substrates. α-GalNAcase I and II both hydrolyzed terminal α-N-acetylgalactosaminyl linkages of the natural compounds investigated: Forssman hapten glycolipid, blood group A active oligosaccharide and GalNAc-α1-O-serine. On the other hand, oligosaccharides, and glycolipid containing α-galactosyl terminals were hydrolyzed by α-GalNAcase I but not by α-GalNAcase II. The substrate specificities and other enzymatic properties of α-GalNAcase I were similar to those of human placental α-GalNAcase, but distinct from α-GalNAcase II.

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