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

Type Article
Date 2009-04
Language English
Author(s) Moppert Xavier1, Le Costaouec Tinaig2, Raguenes Gerard2, Courtois Anthony2, Simon-Colin Christelle2, Crassous Philippe3, Costa Bernard1, Guezennec Jean2
Affiliation(s) 1 : CAIRAP Sarl, Papeete, Tahiti, Fr Polynesia.
2 : BIOMAR BMM, Ctr Brest, Inst Francais Rech Exploitat Mer, Plouzane, France.
3 : EEP LEP, Ctr Brest, Inst Francais Rech Exploitat Mer, Plouzane, France.
Source Journal of Industrial Microbiology and Biotechnology (1367-5435) (Springer), 2009-04 , Vol. 36 , N. 4 , P. 599-604
DOI 10.1007/s10295-009-0529-8
WOS© Times Cited 28
Keyword(s) Sulphated exopolysaccharide, Microbial mats, Iron, Copper, Binding capacity
Abstract 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.
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Moppert Xavier, Le Costaouec Tinaig, Raguenes Gerard, Courtois Anthony, Simon-Colin Christelle, Crassous Philippe, Costa Bernard, Guezennec Jean (2009). Investigations into the uptake of copper, iron and selenium by a highly sulphated bacterial exopolysaccharide isolated from microbial mats. Journal of Industrial Microbiology and Biotechnology, 36(4), 599-604. Publisher's official version : https://doi.org/10.1007/s10295-009-0529-8 , Open Access version : https://archimer.ifremer.fr/doc/00000/6397/