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Editor response for version 1
AI summary Read the abstract
Scientists studying a heavily polluted lagoon in Côte d'Ivoire discovered bacteria carrying genes for four new enzymes that may be able to break down PET plastic — the material used in water bottles and food packaging. This matters because plastic pollution in waterways eventually breaks down into microplastics that can enter our food and water supply, and finding natural enzymes that degrade plastic waste could offer a more eco-friendly cleanup solution before that happens. That said, this research identified these enzymes using computer modeling, so lab testing is still needed to confirm they actually work as hoped.
Microplastic pollution poses a growing threat to Ivorian aquatic ecosystems, especially in urban areas where solid waste management remains inadequate. The Ébrié lagoon receives around 200,000 tons of plastic waste each year, much of which ends up in the form of microparticles in the water and sediments. Considering this, the enzymatic biodegradation of polyethylene terephthalate (PET) represents a promising bioremediation pathway, but the microorganisms capable of contributing to it in this ecosystem have remained unknown until now. This study applied a comparative shotgun metagenomic approach to samples taken from two sites with distinct levels of contamination: Biétry Bay (polluted site) and Lake Kassembié (reference site). The taxonomic analysis revealed a high microbial diversity at the two sites, with 131 unclassified bacterial species, 58% of which were exclusive to the polluted site. Functional annotation identified 15,860 hydrolases encoding genes and 195 genes from the CE1 carbohydrate esterase family. Structural validation by AlphaFold2 and TM-align identified four new putative PETases, designated BietPETase1 to BietPETase4. These results demonstrate that the microbiome of the Ébrié lagoon constitutes a reservoir of enzymes degrading PET and underline the potential of metagenomics for the discovery of plastizymes in aquatic ecosystems of Côte d'Ivoire.
More Papers Like This
Reviewer response for version 1
AI summary Read the abstract
Scientists studying a heavily polluted lagoon in Côte d'Ivoire discovered bacteria that have naturally evolved the ability to break down PET plastic (the kind used in water bottles), including four brand-new enzymes never seen before. This matters because plastic pollution in waterways eventually breaks down into microplastics that can enter our food and water supply, so finding natural "plastic-eating" enzymes could lead to better tools for cleaning up plastic waste before it becomes a health hazard. While this is an early discovery step—these enzymes still need to be tested and developed further—it offers a promising, nature-based
Reviewer response for version 1
AI summary Read the abstract
Scientists studying a heavily polluted lagoon in Côte d'Ivoire discovered bacteria that have naturally evolved the ability to break down plastic waste, including four brand-new enzymes that may help degrade PET plastic (the kind used in water bottles). This matters because plastic pollution in waterways eventually breaks down into microplastics that can enter our food and water supply, so finding natural "plastic-eating" microbes could lead to better ways to clean up pollution before it affects human health. While these enzymes still need further testing, this research points to a promising, nature-based tool for tackling the growing microplastic problem
Editor response for version 2
AI summary Read the abstract
Researchers studied water samples from two sites in Côte d'Ivoire, including an urban lagoon and a reference lake, to look for microbes and genes capable of breaking down PET plastic. Genetic analysis found many previously uncharacterized microbial species and genes, including four candidate enzymes that structurally resembled a known plastic-degrading enzyme, which could be tested further in lab experiments.
Reviewer response for version 2
AI summary Read the abstract
Researchers studied water samples from two sites in Côte d'Ivoire, an urban lagoon and a reference lake, analyzing genetic material from microbes living there. They found many unknown microbial species and genes, including enzymes that may break down plastic, and identified four candidate enzymes for further lab testing against PET plastic.
Overcoming catalytic barriers to reprogram acyltransferases for bis(2-hydroxyethyl) terephthalate hydrolysis
AI summary Read the abstract
Scientists engineered a bacterial enzyme to break down plastic waste more efficiently, turning PET (the plastic in water bottles) into valuable, reusable chemical building blocks instead of just breaking it into low-value pieces. This matters because better plastic recycling technology could reduce the mountains of plastic waste that eventually break down into microplastics—tiny particles increasingly found in our water, food, and even our bodies, where researchers are still studying their potential health effects.
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