Structural Studies on Glycolipid of Shellfish

III. Novel Glycolipids from Turbo cornutus

Abstract

Five kinds of sphingoglycolipids were isolated from Turbo cornutus. Four of them were a series of novel glycolipids consisting only of galactose. The structures of these glycolipids were studied by methylation analysis, periodate oxidation, enzymatic degradation, and proton magnetic resonance spectroscopy. Three glycolipids were characterized as galactosyl(β1→1)ceramide, galactosyl(β1→6)galactosyl(β1→1)ceramide, and galactosyl(β→6)galactosyl(β1→6)galactosyl(β1→1)ceramide. Data indicating that the 4 th glycolipid might be the tetragalactosyl derivative of this series were obtained.
The carbohydrate moiety of the 5 th glycolipid, in contrast, was composed of fucose, galactose, glucose, and N-acetylglycosamine in a molar ratio of 1:2:1:1.