Éditeur(s) : Elsevier Sci Ltd
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)-β-D-Ribf-(1→4)-[7,8-O-(Pyr)]-α-D-KDOp-(2→ This kind of chemical structure is generally related to K-antigen polysaccharide of pathogenic Escherichia 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.
Carbohydrate Polymers (0144-8617) (Elsevier Sci Ltd), 2015-06 , Vol. 124 , P. 347-356

Droits : 2015 Elsevier Ltd. All rights reserved.
http://archimer.ifremer.fr/doc/00254/36494/35038.pdf
DOI:10.1016/j.carbpol.2015.02.038
http://archimer.ifremer.fr/doc/00254/36494/

Éditeur(s) : Elsevier
Résumé : The structure of the extracellular polysaccharide produced by the mesophilic species, Alteromonas infernus, found in deep-sea hydrothermal vents and grown under laboratory conditions, has been investigated using partial depolymerization, methylation analysis, mass spectrometry and NMR spectroscopy. The repeating units of this polysaccharide is a nonasaccharide with the following structure: [GRAPHICS] (C) 2004 Elsevier Ltd. All rights reserved.
Carbohydrate Research (0008-6215) (Elsevier), 2004-10 , Vol. 339 , N. 14 , P. 2371-2380

Droits : 2004 Elsevier Ltd All rights reserved
http://archimer.ifremer.fr/doc/2004/publication-2112.pdf
DOI:10.1016/j.carres.2004.07.021
http://archimer.ifremer.fr/doc/00000/2112/