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  • Title: Zeamide, a Glycosylinositol Phosphorylceramide with the Novel Core Arap(1β→6)Ins Motif from the Marine Sponge Svenzea zeai.
    Author: Della Sala G, Teta R, Esposito G, Pawlik JR, Mangoni A, Costantino V.
    Journal: Molecules; 2017 Sep 01; 22(9):. PubMed ID: 28862696.
    Abstract:
    Glycosylinositol phosphorylceramides (GIPCs) show a great structural diversity, but all share a small number of core structures, with a glucosamine, a mannose, or a glucuronic acid as the first sugar linked to the inositol. The Caribbean sponge Svenzea zeai was shown to consistently contain zeamide (1), the first example of a new class of GIPCs, in which the inositol is glycosylated by a d-arabinose. The structure of zeamide was determined by spectroscopic analysis (NMR, MS, ECD) and microscale chemical degradation. The 6-O-β-d-arabinopyranosyl-myo-inositol (d-Arap(1β→6)Ins) core motif of zeamide is unprecedented not only among GIPCs, but also in any natural glycoconjugate.
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