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Article Dans Une Revue Carbohydrate Polymers Année : 2015

The marine bacteria Cobetia marina DSMZ 4741 synthesizes an unexpected K-antigen-like exopolysaccharide

Résumé

We have studied the exopolysaccharide produced by Cobetia marina DSMZ 4741, a marine bacterium isolated from coastal seawater. This strain is able to produce a polysaccharide in presence of carbon sources as glucose, mannitol and alginate. The maximum production occurs in aerobic condition, during the end of the exponential phase. The polymer is a non-viscous, acidic heteropolysaccharide of 270 kDa constituted of a repeating unit of: -> 2)-beta-D-Ribf-(1 -> 4)-[7,8-O-(Pyr)]-alpha-D-KDOp-(2 -> This kind of chemical structure is generally related to K-antigen polysaccharide of pathogenic Escherichla coli strains. This is the first time this type of EPS is described from a marine bacterium. Moreover the polysaccharide exhibits a pyruvate substitution on its 3-deoxy-D-manno-oct-2-ulosonic acid (KDO) residue never encountered before. The discovery of such an unexpected EPS with high biotechnological potential is a new incentive for a better exploration of bioactive marine resources. (c) 2015 Elsevier Ltd. All rights reserved.

Dates et versions

hal-01253983 , version 1 (11-01-2016)

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Florian Lelchat, Stéphane Cérantola, Christophe Brandily, Sylvia Colliec-Jouault, Anne-Claire Baudoux, et al.. The marine bacteria Cobetia marina DSMZ 4741 synthesizes an unexpected K-antigen-like exopolysaccharide. Carbohydrate Polymers, 2015, 124, pp.347-356. ⟨10.1016/j.carbpol.2015.02.038⟩. ⟨hal-01253983⟩
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