Assignment of the 13 C Nuclear Magnetic Resonance Spectrum of Aqueous Ganglioside G M1 Micelles†

Laurel O. Sillerud, James H. Prestegard, Robert K Yu, David E. Schafer, William H. Konigsberg

Research output: Contribution to journalArticle

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Abstract

This article describes the natural-abundance Fourier-transform carbon-13 nuclear magnetic resonance spectrum, at 67.88 MHz, of aqueous micelles of bovine brain ganglioside G M1 of purity greater than 99%. Assignments are given for every carbon nucleus in the molecule, on the basis of a comprehensive study of the relevant mono-, di-, tri-, and polysaccharides, including several containing sialic acid (5-acetamido-3,5-dideoxy-D-glyrero-D-galacto-nonulopyrano-sonic acid), and phospho-, sphingo-, and glycosphingolipids. These assignments represent an extension of the 13 C nuclear magnetic resonance data from monosaccharides and lipids to complex oligosaccharides and glycolipids. They also form the basis for interpretation of spectral perturbations induced in G M1 by titration with paramagnetic europium(III). The single sialic acid in Gm1 was found to be a-glycosidically linked in the oligosaccharide from considerations of its unique anomeric chemical shift. The sialic acid carboxyl and glyceryl side chain, along with additional ligands donated by the 2-acetamido-2-deoxy-β-d-galactopyranoside and terminal β-d-galactopy-ranoside residues in the oligosaccharide portion of G M1 , were found to be intimately involved with cation binding. It is proposed that the higher affinity, compared with monomeric sialic acid, of Gm1 for cations may result from these additional oligosaccharide groups, which may effectively compete for water ligands in the metal cation coordination sphere.

Original languageEnglish (US)
Pages (from-to)2619-2628
Number of pages10
JournalBiochemistry
Volume17
Issue number13
DOIs
StatePublished - Jan 1 1978
Externally publishedYes

Fingerprint

G(M1) Ganglioside
Micelles
N-Acetylneuraminic Acid
Magnetic Resonance Spectroscopy
Oligosaccharides
Nuclear magnetic resonance
Cations
Carbon
Europium
Ligands
Trisaccharides
Glycosphingolipids
Monosaccharides
Glycolipids
Chemical shift
Fourier Analysis
Titration
Galactose
Polysaccharides
Brain

ASJC Scopus subject areas

  • Biochemistry

Cite this

Assignment of the 13 C Nuclear Magnetic Resonance Spectrum of Aqueous Ganglioside G M1 Micelles† . / Sillerud, Laurel O.; Prestegard, James H.; Yu, Robert K; Schafer, David E.; Konigsberg, William H.

In: Biochemistry, Vol. 17, No. 13, 01.01.1978, p. 2619-2628.

Research output: Contribution to journalArticle

Sillerud, Laurel O. ; Prestegard, James H. ; Yu, Robert K ; Schafer, David E. ; Konigsberg, William H. / Assignment of the 13 C Nuclear Magnetic Resonance Spectrum of Aqueous Ganglioside G M1 Micelles† In: Biochemistry. 1978 ; Vol. 17, No. 13. pp. 2619-2628.
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