O-Specific chain structure from the lipopolysaccharide fraction of Pseudomonas reactans: a pathogen of the cultivated mushrooms |
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| Authors: | Molinaro Antonio Evidente Antonio Sante Iacobellis Nicola Lanzetta Rosa Lo Cantore Pietro Mancino Anna Parrilli Michelangelo |
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| Institution: | Dipartimento di Chimica Organica e Biochimica, Università di Napoli Federico II, via Cintia 4, I-80126, Naples, Italy. molinaro@unina.it |
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| Abstract: | An O-specific polysaccharide containing 2-acetamidino-2-deoxy-beta-D-glucopyranose (Glcp2Am), 2,4-diacetamido-2,4,6-trideoxy-beta-D-glucopyranose (QuipNAc4NAc, bacillosamine) and 2,4-di-(N-acetyl-L-alanylamino)-2,4,6-trideoxy-beta-D-glucopyranose (QuipNAlaAc4NAlaAc) was isolated from the phenol-soluble lipopolysaccharide fraction of the mushroom-associated bacterium Pseudomonas reactans. The structure, determined by means of chemical analysis and 1D and 2D NMR spectroscopy, showed a linear trisaccharide-repeating unit, as shown below:-->3)-beta-D-QuipNAlaAc4NAlaAc-(1-->3)-alpha-D-Glcp2Am-(1-->3)-alpha-D-QuipNAc4NAc(1-->To our knowledge, this is the first complete O-chain structure reported for the lipopolysaccharide of a mushroom-associated bacterium. |
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| Keywords: | O-Specific polysaccharide Mushrooms Pseudomonas reactans Lipopolysaccharide bacillosamine |
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