Soil bacterium enzyme shows promise for breaking down toxic industrial pollutants
Naveed M, Saleem A, Aziz T, Rasheed U, Azeem A
Phytoremediation
Contaminated runoff from industrial sites carries some of the most persistent toxins into the soil and water gardeners rely on, and a naturally occurring bacterial enzyme may offer a way to neutralize them without chemical intervention.
Some industrial pollutants called polychlorinated dibenzofurans are incredibly difficult to get rid of once they enter the environment, building up in soil, water, and living things. Scientists tested whether an enzyme made by a common soil bacterium could latch onto these pollutants and break them apart. Using computer modeling, they confirmed the enzyme binds tightly to the toxins and stays stable while doing so, pointing toward a biological cleanup method that avoids harsh chemicals.
Key Findings
Laccase from Bacillus paralicheniformis showed binding energies of -7.3 and -7.2 kcal/mol with two of the most toxic PCDF variants, indicating strong molecular affinity.
Molecular dynamics simulations run over 100 nanoseconds confirmed the enzyme-pollutant complex remains structurally stable, with key interactions at residues PRO A:433, HIS B:431, and LYS B:466.
Toxicity screening confirmed laccase itself is non-toxic while PCDFs showed significant systemic toxicity, supporting its safety profile for environmental bioremediation applications.
chevron_right Technical Summary
Researchers found that a natural enzyme called laccase, produced by a common soil bacterium, can tightly bind to and potentially break down some of the most toxic industrial pollutants on earth. Computer simulations confirmed the enzyme is stable and non-toxic, suggesting it could be used to clean contaminated soils and waterways without harsh chemicals.
Abstract Preview
Original paper
Revolutionizing the potential of laccase from Bacillus paralicheniformis as an eco-friendly solution to reduce polychlorinated dibenzofurans contamination through integrated computational approach.
Several risks to ecosystems and human health are increasing day by day and among them, Polychlorinated dibenzofurans (PCDFs) are persistent environmental pollutants which pose significant risks bec...
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