TY - JOUR
T1 - Isolation and characterization of a novel monosialosylpentahexosyl ceramide from Tay-Sachs brain
AU - Itoh, T.
AU - Li, Y. T.
AU - Li, S. C.
AU - Yu, R. K.
N1 - Copyright:
Copyright 2004 Elsevier B.V., All rights reserved.
PY - 1981
Y1 - 1981
N2 - A novel monosialoganglioside was isolated from Tay-Sachs brains. It represented about 0.1% of the total ganglioside mixture. Compositional analysis by gas-liquid chromatography indicated that it contained glucose, galactose, N-acetylgalactosamine, N-acetylneuraminic acid, and long chain base in the molar ratio of 1:2:2:1:1. The ganglioside was found to be resistant to neuraminidase (Clostridium perfringens), β-hexosaminidase (jack bean), and β-galactosidase. However, it could be degraded by a human liver β-hexosaminidase preparation in the presence of an activator to produce a glycolipid chromatographically identical with authentic IV3NeuAc-GgOse4-ceramide. This glycolipid product was resistant to β-galactosidase (jack bean), but could be readily degraded to GgOse4-ceramide by neuraminidase. Mild formic acid hydrolysis degraded the intact ganglioside to an asialo derivative chromatographically identical with the pentahexosyl ceramide (GalNAc-Gal-GalNAc-Gal-Glc-ceramide) derived from G(D1a-GalNAc). The asialo derivative could then be degraded to GgOse4-ceramide and GgOse3-ceramide by sequential treatment with jack bean β-hexosaminidase and β-galactosidase. These data suggest that the novel ganglioside is a monosialosylpentahexosyl ceramide with the sialosyl group attached to the penultimate r224w1 =GalNAc(β1-4)Gal(β1-3)GalNAc(β1-4)Gal(β1-4)Glc-ceramide galactose moiety of the pentahexosyl ceramide backbone, and it has the following structure: (Ga1NAc(β1-4)Ga1(β1-3)Ga1NAc(β1-4)Ga1(β1-4)Glc-ceramide (3/2/α) NeuAc
AB - A novel monosialoganglioside was isolated from Tay-Sachs brains. It represented about 0.1% of the total ganglioside mixture. Compositional analysis by gas-liquid chromatography indicated that it contained glucose, galactose, N-acetylgalactosamine, N-acetylneuraminic acid, and long chain base in the molar ratio of 1:2:2:1:1. The ganglioside was found to be resistant to neuraminidase (Clostridium perfringens), β-hexosaminidase (jack bean), and β-galactosidase. However, it could be degraded by a human liver β-hexosaminidase preparation in the presence of an activator to produce a glycolipid chromatographically identical with authentic IV3NeuAc-GgOse4-ceramide. This glycolipid product was resistant to β-galactosidase (jack bean), but could be readily degraded to GgOse4-ceramide by neuraminidase. Mild formic acid hydrolysis degraded the intact ganglioside to an asialo derivative chromatographically identical with the pentahexosyl ceramide (GalNAc-Gal-GalNAc-Gal-Glc-ceramide) derived from G(D1a-GalNAc). The asialo derivative could then be degraded to GgOse4-ceramide and GgOse3-ceramide by sequential treatment with jack bean β-hexosaminidase and β-galactosidase. These data suggest that the novel ganglioside is a monosialosylpentahexosyl ceramide with the sialosyl group attached to the penultimate r224w1 =GalNAc(β1-4)Gal(β1-3)GalNAc(β1-4)Gal(β1-4)Glc-ceramide galactose moiety of the pentahexosyl ceramide backbone, and it has the following structure: (Ga1NAc(β1-4)Ga1(β1-3)Ga1NAc(β1-4)Ga1(β1-4)Glc-ceramide (3/2/α) NeuAc
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M3 - Article
C2 - 7451432
AN - SCOPUS:0019852876
VL - 256
SP - 165
EP - 169
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
SN - 0021-9258
IS - 1
ER -