Investigations into the uptake of copper, iron and selenium by a highly sulphated bacterial exopolysaccharide isolated from microbial mats

  • Xavier MoppertEmail author
  • Tinaïg Le Costaouec
  • Gérard Raguenes
  • Anthony Courtois
  • Christelle Simon-Colin
  • Philippe Crassous
  • Bernard Costa
  • Jean Guezennec
Original Paper


A bacterium isolated from microbial mats located on a polynesian atoll produced a high molecular weight (3,000 kDa) and highly sulphated exopolysaccharide. Previous studies showed that the chemical structure of this EPS consisted of neutral sugars, uronic acids, and high proportions of acetate and sulphate groups. The copper- and iron-binding ability of the purified pre-treated native EPS was investigated. Results showed that this EPS had a very high affinity for both copper (9.84 mmol g−1 EPS) and ferrous iron (6.9 mmol g−1 EPS). Amazingly, this EPS did not show any affinity for either ferric ions or selenium salts. This finding is one of the first steps in assessing the biotechnological potential of this polysaccharide.


Binding capacity Copper Iron Microbial mats Sulphated exopolysaccharide 



This study was financially supported by the CAIRAP SA (Arue, Tahiti). The authors would like to thank the Research Ministry of the government of French Polynesian and specially Mrs. Tea Frogier for her help in the organization of this research program.


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Copyright information

© Society for Industrial Microbiology 2009

Authors and Affiliations

  • Xavier Moppert
    • 1
    Email author
  • Tinaïg Le Costaouec
    • 2
  • Gérard Raguenes
    • 2
  • Anthony Courtois
    • 2
  • Christelle Simon-Colin
    • 2
  • Philippe Crassous
    • 3
  • Bernard Costa
    • 1
  • Jean Guezennec
    • 2
  1. 1.CAIRAP Sarl, Centre d’Analyses Industrielles et de Recherche Appliquée pour le PacifiquePapeete, TahitiFrench Polynesia
  2. 2.Institut Français de Recherche pour l’Exploitation de la MerBIOMAR/BMM, Centre de BrestPlouzanéFrance
  3. 3.Institut Français de Recherche pour l’Exploitation de la MerEEP/LEP, Centre de BrestPlouzanéFrance

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