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The structure of the acidic exopolysaccharide produced byPseudomonas“gingeri” strain Pf9

Authors
Journal
Carbohydrate Research
0008-6215
Publisher
Elsevier
Publication Date
Volume
275
Issue
2
Identifiers
DOI: 10.1016/0008-6215(95)00181-r
Keywords
  • Pseudomonas “Gingeri” Strain Pf9
  • Mushroom Pathogen
  • Acidic Exopolysaccharide Structure
Disciplines
  • Chemistry

Abstract

Abstract The structure of the acidic exopolysaccharide produced by the mushroom pathogen Pseudomonas “gingeri” strain Pf9, a bacterium which causes ginger blotch, was investigated by chemical analysis, mass spectrometry and 1D and 2D NMR spectroscopy. The polysaccharide consists of the linear trisaccharide repeating unit where the cyclic pyruvic acetal groups at O-4 and O-6 of the mannopyranosyl residues have the S-configuration. Methylation analysis under neutral conditions and NMR data showed that the mannose residues are acetylated at O-2. This exopolysaccharide has the same structure as the E. coli K55 capsular polysaccharide and differs from the Klebsiella K5 capsular polysaccharide only in the position of acetylation (C-2 of the glucopyranose residue).

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