title: Melibiosylceramide as the sole ceramide dihexoside from the eggs of the sea urchin, Anthocidaris crassispina.
abstract: Melibiosylceramide (Gal alpha 1-6Glc beta 1-1Cer) was found as the sole ceramide dihexoside from the eggs of the sea urchin, Anthocidaris crassispina. Ceramide monohexoside of the eggs consisted only of glucosylceramide (Glc beta 1-1Cer). These lipids were purified by successive column chromatographies on DEAE-Sephadex A-25, silicic acid and Florisil, and identified by gas-liquid chromatography, negative-ion fast atom bombardment mass spectrometry and proton nuclear magnetic resonance spectroscopy as well as methylation analysis. Long-chain base compositions of both lipids were almost identical and comprised n-C18-phytosphingosine and small amounts of its homologs (C17-C19). Fatty acid compositions were qualitatively very similar, but the glucosylceramide contained more 2-hydroxy fatty acid than the melibiosylceramide. Although the chain length of fatty acids was distributed over a wide range, six major fatty acids, namely 22:1, 23:1, 24:1, 22h:1, 23h:1 and 24h:1, constituted more than 92% of the fatty acid content in these lipids.
authors.affiliation: Department of Life Science, Faculty of Science, Tokyo Institute of Technology.
authors.forename: H
authors.initials: H
authors.lastname: Kubo
authors.forename: A
authors.initials: A
authors.lastname: Irie
authors.forename: F
authors.initials: F
authors.lastname: Inagaki
authors.forename: M
authors.initials: M
authors.lastname: Hoshi
mesh_terms: D000818:Animals; D002554:Cerebrosides / Q000032:analysis*; D002849:Chromatography, Gas; D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D002855:Chromatography, Thin Layer; D005227:Fatty Acids / Q000032:analysis; D005260:Female; D005963:Glucosylceramides / Q000032:analysis*; D013058:Mass Spectrometry; D010063:Ovum / Q000032:analysis; D012617:Sea Urchins / Q000378:metabolism*
chemical_list: D002554:Cerebrosides; D005227:Fatty Acids; D005963:Glucosylceramides; C058813:melibiosylceramide