TY - JOUR
T1 - The chemical structure of neutral and acidic sugar chains obtained from bovine colostrum κ-casein
AU - Saito, Tadao
AU - Itoh, Takatoshi
AU - Adachi, Susumu
AU - Suzuki, Tateo
AU - Usui, Taichi
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1981/12/4
Y1 - 1981/12/4
N2 - One neutral oligosaccharide alditol (tetrasacchariditol, 10%) and three acidic oligosaccharide alditols (a tri (28%), tetra (17%) and a pentasacchariditol (44%)) were isolated from, colostrum κ-casein taken 6h after parturition. The neutral tetrasacchariditol and the acidic pentasacchariditol only contained a characteristic N-acetylglucosamine, and the latter was the main carbohydrate portion. The chemical structures were analyzed by methylation analysis with gas-liquid chromatography-mass spectrometry and by anomer analysis with 13C nuclear magnetic resonance, and were identified to be galactosyl-β-1-3[galactosyl-β-1-4-N-acetylglucosaminyl-β-1-6-]-N- acetylgalactosaminitol, N-acetylneuraminyl-α-2-3-galactosyl-b-1-3-[galactosyl-β-1-4-N-acetylglucosaminyl-β-1-6-]- N-acetylgalactosaminitol, N-acetylneuraminyl-α-2-3-galactosyl-β-1-3-N-acetylgalactosaminitol and N-acetylneuraminyl- α-2-3-galactosyl-β-1-3-[N-acetylneuraminyl-α-2-6-]-N-acetylgalactosaminitol. The former two were the novel carbohydrate chains of colostrum κ-casein, but the latter two were identical with those which have been found in normal κ-casein.
AB - One neutral oligosaccharide alditol (tetrasacchariditol, 10%) and three acidic oligosaccharide alditols (a tri (28%), tetra (17%) and a pentasacchariditol (44%)) were isolated from, colostrum κ-casein taken 6h after parturition. The neutral tetrasacchariditol and the acidic pentasacchariditol only contained a characteristic N-acetylglucosamine, and the latter was the main carbohydrate portion. The chemical structures were analyzed by methylation analysis with gas-liquid chromatography-mass spectrometry and by anomer analysis with 13C nuclear magnetic resonance, and were identified to be galactosyl-β-1-3[galactosyl-β-1-4-N-acetylglucosaminyl-β-1-6-]-N- acetylgalactosaminitol, N-acetylneuraminyl-α-2-3-galactosyl-b-1-3-[galactosyl-β-1-4-N-acetylglucosaminyl-β-1-6-]- N-acetylgalactosaminitol, N-acetylneuraminyl-α-2-3-galactosyl-β-1-3-N-acetylgalactosaminitol and N-acetylneuraminyl- α-2-3-galactosyl-β-1-3-[N-acetylneuraminyl-α-2-6-]-N-acetylgalactosaminitol. The former two were the novel carbohydrate chains of colostrum κ-casein, but the latter two were identical with those which have been found in normal κ-casein.
KW - C-NMR (Bovine colostrum)
KW - Carbohydrate sequence
KW - Caseinoglycopeptide
KW - κ-Casein
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U2 - 10.1016/0304-4165(81)90215-4
DO - 10.1016/0304-4165(81)90215-4
M3 - Article
C2 - 7317452
AN - SCOPUS:0019872771
VL - 678
SP - 257
EP - 267
JO - Biochimica et Biophysica Acta - General Subjects
JF - Biochimica et Biophysica Acta - General Subjects
SN - 0006-3002
IS - 2
ER -