title: Studies on glycosphingolipids of fresh-water bivalves. VI. Isolation and chemical characterization of neutral glycosphingolipids from spermatozoa of the fresh-water bivalve, Hyriopsis schlegelii.
abstract: The spermatozoa of the fresh-water bivalve, Hyriopsis schlegelii, had a complex spectrum of neutral glycosphingolipids. CDS, CTS, CTeS were isolated as minor components (together they accounted for 3% of the total neutral glycolipid fraction), while CMS and the glycolipids (Lipid I, II, and III) with larger saccharide chains that were previously characterized (1--4) occurred as major ones. The chemical structures were determined by employing exoglycosidases, partial acid hydrolysis and permethylation analysis. The proposed structures are as follows: Man alpha(1-3)Man beta(1-4)Glc-Cer for CTS, and Man alpha(1-3)[Xyl beta(1-2)]Man beta(1-4)Glc-Cer for CTeS. CTeS was the first example of a tetraglycosyl ceramide containing xylose. In another fraction, two types of diglycosyl ceramides were obtained as a mixture, and identified as Man beta(1-4)Glc-Cer and Gal beta(1-4)Glc-Cer, respectively. The long-chain base was predominantly composed of sphingosine, and the acyl groups were mainly of palmitate and stearate.
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D005227:Fatty Acids / Q000302:isolation & purification; D006028:Glycosphingolipids / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008297:Male; D008974:Mollusca / Q000032:analysis*; D013094:Spermatozoa / Q000032:analysis
chemical_list: D005227:Fatty Acids; D006028:Glycosphingolipids