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Updated: Jul 31, 2025
06:10
Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge
Published on: September 26, 2016
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Bacterial extracellular polymeric substances: Biosynthesis and interaction with environmental pollutants
Vandana1, Monika Priyadarshanee1, Surajit Das1
1Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela, 769 008, Odisha, India.
Chemosphere
|May 10, 2023
Summary
Bacterial extracellular polymeric substances (EPS) are biopolymers that can bind and remove environmental pollutants. Understanding EPS biosynthesis and pollutant interactions can enhance bioremediation strategies for pollution control.
Area of Science:
- Microbiology
- Environmental Science
- Biochemistry
Background:
- Extracellular polymeric substances (EPS) are bacterial biopolymer matrices essential for bacterial structure and nutrition.
- EPS composition includes polysaccharides, proteins, lipids, and DNA, with functional groups like carbonyl and hydroxyl influencing pollutant interactions.
- Specific genes and operons (e.g., crd, alg, wca, gum) regulate the biosynthesis of diverse EPS polymers.
Approach:
- This review examines the biosynthetic pathways of bacterial EPS, focusing on genes and operons regulating polymer production.
- It explores the mechanisms by which EPS interact with and sequester environmental pollutants, including organic compounds and heavy metals.
Key Points:
- EPS functional groups (carbonyl, hydroxyl, phosphoryl, amide) facilitate pollutant binding via hydrophobic interactions, coordinate bonds, complexation, adsorption, precipitation, and ion exchange.
- Specific genes and operons (crd, alg, wca, gum) control the synthesis of diverse EPS like curdlan, alginate, colonic acid, and xanthan.
- EPS effectively bind, emulsify, and solubilize organic pollutants, enhancing biodegradation, and sequester heavy metals.
Conclusions:
- EPS biosynthesis pathways and genes are crucial for producing effective biopolymers for environmental cleanup.
- Understanding EPS-pollutant interactions facilitates the development of novel bioremediation strategies.
- Genetic engineering of EPS production holds promise for enhanced pollution control through increased pollutant sequestration.
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