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Mar. Drugs 2010, 8(8), 2240-2251; doi:10.3390/md8082240
Article

Characterization of the Exopolysaccharide Produced by Salipiger mucosus A3T, a Halophilic Species Belonging to the Alphaproteobacteria, Isolated on the Spanish Mediterranean Seaboard

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1 Microbial Exopolysaccharide Research Group, Department of Microbiology, Faculty of Pharmacy, Cartuja Campus, University of Granada, 18071 Granada, Spain 2 IUT, Département Génie Biologique, allée André Maurois, 87065 Limoges, France 3 Laboratorie de Microbiologie et Biochimie Appliquée, ENITA de Bordeaux, 1 Cours du Général de Gaulle, BP 201, 33175 Gradignan, France
* Author to whom correspondence should be addressed.
Received: 8 June 2010 / Revised: 16 July 2010 / Accepted: 28 July 2010 / Published: 30 July 2010
(This article belongs to the collection Marine Polysaccharides)
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Abstract

We have studied the exopolysaccharide produced by the type strain of Salipiger mucosus, a species of halophilic, EPS-producing (exopolysaccharide-producing) bacterium belonging to the Alphaproteobacteria. The strain, isolated on the Mediterranean seaboard, produced a polysaccharide, mainly during its exponential growth phase but also to a lesser extent during the stationary phase. Culture parameters influenced bacterial growth and EPS production. Yield was always directly related to the quantity of biomass in the culture. The polymer is a heteropolysaccharide with a molecular mass of 250 kDa and its components are glucose (19.7%, w/w), mannose (34%, w/w), galactose (32.9%, w/w) and fucose (13.4%, w/w). Fucose and fucose-rich oligosaccharides have applications in the fields of medicine and cosmetics. The chemical or enzymatic hydrolysis of fucose-rich polysaccharides offers a new efficient way to process fucose. The exopolysaccharide in question produces a solution of very low viscosity that shows pseudoplastic behavior and emulsifying activity on several hydrophobic substrates. It also has a high capacity for binding cations and incorporating considerable quantities of sulfates, this latter feature being very unusual in bacterial polysaccharides.
Keywords: exopolysaccharides; Salipiger mucosus; halophilic bacteria; fucose; sulfates exopolysaccharides; Salipiger mucosus; halophilic bacteria; fucose; sulfates
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Llamas, I.; Mata, J.A.; Tallon, R.; Bressollier, P.; Urdaci, M.C.; Quesada, E.; Béjar, V. Characterization of the Exopolysaccharide Produced by Salipiger mucosus A3T, a Halophilic Species Belonging to the Alphaproteobacteria, Isolated on the Spanish Mediterranean Seaboard. Mar. Drugs 2010, 8, 2240-2251.

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