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• W2014630846 endingPage "35" @default.
• W2014630846 startingPage "19" @default.
• W2014630846 abstract "In order to investigate the significance of preferred conformations of the saccharide for the steric orientation and recognition of glycosphingolipids at the membrane surface, the conformational free energy calculations were carried out on the asialo-GM1 [GA1; β-D-Gal(1 → 3) β-D-GalNAc(1 → 4) β-D-Gal(1 → 4) β-D-Glc-O-ceramide] using a new program CONCARB (CONformational study program for CARBohydrate) in the unhydrated and hydrated states. The overall backbone conformation of GA1 appears nearly to be extended with a little bent at the glycosidic II–III linkage, in which two pyranose rings of Gal(IV)-GalNAc-(III) moiety orient approximately perpendicular to those of Gal(II)-Glc(I) moiety. This is consistent with the structures deduced from high-sensitivity differential scanning calorimetry experiments and the nmr study on GA1. The calculated glycosidic torsion angles of the lowest free energy conformation of GA1 in the hydrated state are in accord with the structures of relevant oligosaccharides deduced from nmr experiments and hard sphere exoanomeric calculations. A comparison of the values of glycosidic torsion angles ϕ and π of GA1 and its constituent oligosaccharides indicates that the overall backbone conformation of each oligosaccharide is retained when the oligosaccharide chain becomes longer. This implies that the short-range interactions between the nearest-neighbored saccharides are of significant importance in stabilizing the overall backbone conformation of GA1 in both the unhydrated and hydrated states. The different orientation and hydrogen bonds of hydroxymethyl and hydroxyl groups from one oligosaccharide to another suggest that the medium- and long-range interactions are also of consequence. Hydration seems to affect significantly the conformation of these groups, but not to perturb remarkably the overall backbone conformation of GA1. © 1997 John Wiley & Sons, Inc. Biopoly 42: 19–35, 1997" @default.
• W2014630846 created "2016-06-24" @default.
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• W2014630846 date "1997-07-01" @default.
• W2014630846 modified "2023-09-25" @default.
• W2014630846 title "Conformational study of asialo-GM1 (GA1) ganglioside" @default.
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• W2014630846 doi "https://doi.org/10.1002/(sici)1097-0282(199707)42:1<19::aid-bip3>3.0.co;2-4" @default.
• W2014630846 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9209156" @default.
• W2014630846 hasPublicationYear "1997" @default.
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