alexa Gangliosides from the eggs of the sea urchin, Anthocidaris crassispina.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Glycomics & Lipidomics

Author(s): Kubo H, Irie A, Inagaki F, Hoshi M

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Abstract NeuGc alpha 2-6Glc beta 1-1Cer (M5 ganglioside) and HSO3-8NeuGc alpha 2-6Glc beta 1-1Cer (T1 ganglioside) were purified by column chromatographies with DEAE-Sephadex A-25 and silicic acid from the eggs of the sea urchin, Anthocidaris crassispina. Their chemical structures were determined by gas-liquid chromatography, methylation analysis, enzymatic hydrolysis, negative-ion fast atom bombardment mass spectrometry, and proton nuclear magnetic resonance spectroscopy. Long-chain base compositions of both gangliosides were almost identical: all the long-chain bases were phytosphingosines, and C18-phytosphingosine accounted for more than 95\% of them. Fatty acid compositions were also very similar: the main fatty acids were 22:1, 23:1, 24:1, and their 2-hydroxylated forms, and the 2-hydroxy fatty acids amounted to 65.3 and 74.3\% of the fatty acids in M5 and T1 gangliosides, respectively. Proton nuclear magnetic resonance spectroscopic study revealed a downfield-shifted H8 proton signal of NeuGc residue in T1 ganglioside, in agreement with the presence of sulfate ester at the C8 position.
This article was published in J Biochem and referenced in Journal of Glycomics & Lipidomics

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