A novel sialoglycolipid from hepatopancreas of the starfish Patiria pectinifera.
An unusual sialoglycolipid containing D-glucose, D-galactose, L-arabinose and N-acetylneuraminic acid was purified from the total lipid extract of hepatopancreas of the starfish Patiria pectinifera. The structure of the sialolipid was studied by total and partial acid hydrolysis, methanolysis, periodate oxidation, methylation, chromium trioxide oxidation and enzymatic hydrolysis. The oligosaccharide chain of the sialolipid is branched: N-acetylneuraminic acid is located in the inner part of the carbohydrate chain; the arabinose residues are in furanose forms and are located at the non-reducing ends of the carbohydrate chain. The long-chain bases are C16-, C17- and C18-phytospingosines with both branched and normal chains. Only alpha-hydroxy fatty acids are found, C22-, C23- and C24-alpha-hydroxy fatty acids represent approx. 95% of the total fatty acids.
D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D006017:Glycolipids / Q000032:analysis* / Q000302:isolation & purification; D008099:Liver / Q000032:analysis; D010179:Pancreas / Q000032:analysis; D012794:Sialic Acids / Q000032:analysis* / Q000302:isolation & purification; D013215:Starfish / Q000032:analysis*
D006017:Glycolipids; D012794:Sialic Acids; C009255:sialoglycolipids