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Updated: Feb 10, 2026

Ecotoxicological Method with Marine Bacteria Vibrio anguillarum to Evaluate the Acute Toxicity of Environmental Contaminants
Published on: May 26, 2017
Structure of the Exopolysaccharide Secreted by a Marine Strain Vibrio alginolyticus
Sophie Drouillard1, Isabelle Jeacomine2, Laurine Buon3
1Université Grenoble Alpes, CERMAV, CNRS, Centre de Recherches sur les Macromolécules Végétales (CERMAV), BP 53, 38041 Grenoble CEDEX 9, France. sophie.drouillard@cermav.cnrs.fr.
Abstract:
Vibrio alginolyticus (CNCM I-4151) secretes an exopolysaccharide whose carbohydrate backbone is decorated with amino acids, likely conferring its properties that are appreciated in cosmetics. Here, the secreted polysaccharide of another strain of V. alginolyticus (CNCM I-5034) was characterized by chromatography and one- and two-dimensional NMR spectroscopy experiments. The structure was resolved and shows that the carbohydrate backbone is made of four residues: D-galactose (Gal), D-galacturonic acid (GalA) D-N-acetylglucosamine (GlcNAc) and D-glucuronic acid (GlcA), forming a tetrasaccharide repetition unit [→4)-β-d-GlcA-(1→3)-α-d-Gal-(1→3)-α-d-GalA-(1→3)-β-GlcNAc(1→]. GlcA is derivatized with a lactate group giving 'nosturonic acid', and GalA is decorated with the amino acid alanine.
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