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Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
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Area of Science:

  • Microbiology and Materials Science
  • Synthetic Biology
  • Biotechnology

Background:

  • Biofilms offer resilience for applications like biocatalysis and bioremediation.
  • Beneficial bacteria often exhibit poor biofilm formation, hindering applications.
  • Current solutions like genetic engineering are costly, time-consuming, and not universally applicable.

Purpose of the Study:

  • To investigate synthetic polymers as simple additives to promote biofilm formation.
  • To develop an alternative to genetic modification for enhancing bacterial biofilm capabilities.
  • To assess the impact of synthetic polymers on microbial physiology and biocatalytic performance.

Main Methods:

  • Synthesis of polymers with various functional moieties (cationic, aromatic, heteroaromatic, aliphatic) using controlled radical polymerization and dynamic covalent chemistry.
  • Evaluation of polymer-induced biofilm formation in *Escherichia coli* strains with differing biofilm-forming capacities (MC4100 and PHL644).
  • Assessment of biofilm performance in a biocatalytic transformation assay (5-fluoroindole to 5-fluorotryptophan).

Main Results:

  • Hydrophobic synthetic polymers, particularly those with aromatic and heteroaromatic moieties, effectively induce biofilm formation in poor-forming *E. coli* strains.
  • Polymer-treated strains achieved biomass production and curli expression comparable or superior to well-forming strains.
  • The synthetic polymers enhanced the biocatalytic efficiency of *E. coli* biofilms in converting 5-fluoroindole to 5-fluorotryptophan.

Conclusions:

  • Synthetic polymers serve as effective, non-genetic tools to nucleate and enhance bacterial biofilm formation.
  • These polymers can modulate microbial physiology, mimicking effects of genetic modification.
  • The developed synthetic polymers show promise for advancing biofilm-based applications in biocatalysis and beyond.