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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Bibliographic Details
Published in:Carbohydrate research 2001-03, Vol.331 (2), p.173-182
Main Authors: Faber, Elisabeth J, van den Haak, Mischa J, Kamerling, Johannis P, Vliegenthart, Johannes F.G
Format: Article
Language:English
Subjects:
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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Summary: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