Coprecipitation of Th4+ and the purified extracellular polysaccharide produced by bacterium Bradyrhizobium (Chamaecytisus) BGA-1

@article{DazMarrero2004CoprecipitationOT,
  title={Coprecipitation of Th4+ and the purified extracellular polysaccharide produced by bacterium Bradyrhizobium (Chamaecytisus) BGA-1},
  author={Ana R D{\'i}az-Marrero and M{\'o}nica Santamar{\'i}a and Jairo Hern{\'a}ndez and J. Hern{\'a}ndez Corzo},
  journal={Applied Microbiology and Biotechnology},
  year={2004},
  volume={65},
  pages={356-362}
}
The soil bacterium Bradyrhizobium (Chamaecytisus) strain BGA-1 produces an extracellular polymeric substance (EPS) that, in the presence of Fe3+, Al3+ or Th4+ solutions, forms a gel-like precipitate composed of polysaccharide, protein, lipopolysaccharide and the metal. Precipitation of the main component of the EPS, the extracellular polysaccharide, and thorium was studied. The precipitate was stable, but redissolved at pH values below 3.0 or in the presence of 10 mM EDTA. In the precipitate… Expand
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References

SHOWING 1-10 OF 20 REFERENCES
Precipitation of Metallic Cations by the Acidic Exopolysaccharides from Bradyrhizobium japonicum and Bradyrhizobium (Chamaecytisus) Strain BGA-1
TLDR
The results suggest that the precipitation is based on the interaction between carboxylate groups from different polysaccharide chains and the partially hydrolyzed aquoions of Fe, Al, Th, and Sn. Expand
Effect of thorium on the growth and capsule morphology of Bradyrhizobium.
TLDR
A specific defence mechanism based on metal precipitation by extracellular polymers is suggested, which is mainly in the amorphous fraction of Bradyrhizobium (Chamaecytisus) BGA-1. Expand
Electrophoretic behavior and size distribution of the acidic polysaccharides produced by the bacteria Bradyrhizobium (Chamaecytisus) strain BGA‐1 and Bradyrhizobium japonicum USDA 110
The electrophoretic behavior in polyacrylamide gels of the acidic polysaccharides produced by the soil bacteria Bradyrhizobium (Chamaecytisus) strain BGA1 and Bradyrhizobium japonicum USDA110 hasExpand
Involvement of Lipopolysaccharide of Bradyrhizobium japonicum in Metal Binding
Bacterial cell surface components are the major factors responsible for pathogenesis and bioremediation. In particular, the surface of a Gram-negative bacterium cell has a variety of componentsExpand
Effect of Metal Cations on the Viscosity of a Pectin-Like Capsular Polysaccharide from the Cyanobacterium Microcystis flos-aquae C3-40
TLDR
The data are the first direct demonstration of an interaction between metal ions and purified M. flos-aquae capsule, suggesting that capsular polysaccharide could be a preferable alternative to pectin for certain biotechnological applications. Expand
Studies on the structure and the solution conformation of an acidic extracellular polysaccharide isolated from Bradyrhizobium.
TLDR
The results indicate that the polysaccharide may adopt a variety of three dimensional shapes, and that there is a fair agreement between the NMR-derived distances and those provided by the calculations. Expand
Metal-Binding Characteristics of the Gamma-Glutamyl Capsular Polymer of Bacillus licheniformis ATCC 9945
TLDR
Metal-binding characteristics of B. licheniformis capsule appear to be influenced by the chemical and physical properties of both the capsule and the metal ions. Expand
Relevance of microbial extracellular polymeric substances (EPSs)--Part I: Structural and ecological aspects.
  • H. Flemming, J. Wingender
  • Chemistry, Medicine
  • Water science and technology : a journal of the International Association on Water Pollution Research
  • 2001
TLDR
The EPS matrix is a dynamic system, constructed by the organisms and responding to environmental changes, that enables the cells to function in a manner similar to multicellular organisms. Expand
Sorption of metal ions by whole cells of bacillus and micrococcus
Abstract Metal removal by seven strains of Bacillus and Micrococcus was investigated. The culture age of the cells had little or no effect on their sorption capacity. Using the Langmuir isotherm, itExpand
Engineering bacterial biopolymers for the biosorption of heavy metals; new products and novel formulations
TLDR
A new approach to the generation of amphipathic bioemulsifying formulations is based on the interaction of native or recombinant esterase and its derivatives with emulsan and other water-soluble biopolymers, which generates cation-binding emulsions generated from a variety of hydrophobic substrates. Expand
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