Structure of the exopolysaccharide produced by Streptococcus thermophilus S3

Structure of the exopolysaccharide produced by Streptococcus thermophilus S3

The exopolysaccharide of Streptococcus thermophilus S3, produced in skimmed milk, is composed of d-galactose and l-rhamnose in a molar ratio of 2:1. The polysaccharide contains 0.4 equiv of O-acetyl groups per repeating unit. Linkage analysis and 1D/2D NMR ( 1H and 13C) studies on native and O-deace...

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Veröffentlicht in:Carbohydrate research 2001-03, Vol.331 (2), p.173-182
Hauptverfasser: Faber, Elisabeth J, van den Haak, Mischa J, Kamerling, Johannis P, Vliegenthart, Johannes F.G
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Carbohydrate Conformation
Carbohydrate Sequence
Exopolysaccharide
Lactic acid bacteria
Magnetic Resonance Spectroscopy
Methylation
Milk - microbiology
Molecular Sequence Data
Molecular Structure
Polysaccharides, Bacterial - chemistry
Polysaccharides, Bacterial - isolation & purification
Spectrometry, Mass, Electrospray Ionization
Streptococcus - metabolism
Streptococcus thermophilus
Structural analysis
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Zusammenfassung:The exopolysaccharide of Streptococcus thermophilus S3, produced in skimmed milk, is composed of d-galactose and l-rhamnose in a molar ratio of 2:1. The polysaccharide contains 0.4 equiv of O-acetyl groups per repeating unit. Linkage analysis and 1D/2D NMR ( 1H and 13C) studies on native and O-deacetylated EPS together with nanoES-CID tandem mass spectrometry studies on oligosaccharides generated by a periodate oxidation protocol, show the polysaccharide to have the following structure:
ISSN:0008-6215
1873-426X
DOI:10.1016/S0008-6215(01)00013-1