| Literature DB >> 2611779 |
R Bassi1, L Riboni, S Sonnino, G Tettamanti.
Abstract
Gangliosides that contain the disialosyl residue alpha-Neu5Ac-(2--8)-alpha-Neu5Ac-(2--3)- can lactonize in the presence of traces of acid and this reaction has been studied in detail on GD1b [beta-Gal-(1--3)-beta-GalNAc-(1 --4)-[alpha-Neu5Ac-(2--8)-alpha-Neu5Ac-(2 --3)]-beta-Gal-(1--4)-beta-Glc-1--1)-Cer]. Lactonization occurs rapidly at a proton-ganglioside molar ratio of less than 1. At equilibrium, the ratio of GD1b to its lactone is 3:7. The data suggest the possibility that a proton-driven lactonization of gangliosides may occur in vivo.Entities:
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Year: 1989 PMID: 2611779 DOI: 10.1016/0008-6215(89)85113-4
Source DB: PubMed Journal: Carbohydr Res ISSN: 0008-6215 Impact factor: 2.104