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The plastic-degrading capabilities of Pseudomonas aeruginosa
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Pseudomonas aeruginosa can substantially degrade bio-based plastics like PCL and partially modify recalcitrant polymers like PE and PS, with its plastic-active enzymes identified through genomic profiling. This bacterium shows promise as a modular component in biotechnological strategies to break down plastic waste and reduce microplastic accumulation in contaminated environments.
The global accumulation of synthetic and bio-based plastics has intensified the demand for effective and sustainable degradation strategies. This study explores the plastic-degrading potential of Pseudomonas aeruginosa, focusing on its degrading enzymes, biofilm formation, and biosurfactant production. The study highlights the limited degradability of C–C backbone plastics such as polyethylene (PE), polypropylene (PP), and polystyrene (PS), in contrast to ester-containing polymers like PET, PU, and bio-based plastics (PLA, PCL, PHA), which exhibit greater microbial susceptibility. While P. aeruginosa demonstrates only partial surface modification of recalcitrant plastics, it achieves substantial degradation of bio-based plastics such as PCL. Genomic profiling using PlasticsDB and PAZy databases reveals homologs of plastic-active enzymes, including esterases and depolymerases, with potential roles in polyester degradation. Furthermore, the integration of chemical pretreatment methods, such as pyrolysis of PE into metabolizable alkanes, combined with microbial conversion into polyhydroxyalkanoates (PHA), underscores the importance of hybrid chemo-biotechnological approaches. Despite biosafety concerns, P. aeruginosa emerges as a metabolically versatile and genetically tractable candidate for precision-engineered bioremediation. This work positions P. aeruginosa not as a standalone solution, but as a modular component within broader strategies for next-generation plastic waste valorization and upcycling.
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Pseudomonas aeruginosa clinical isolates can encode plastic-degrading enzymes that allow survival on plastic and augment biofilm formation
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Researchers discovered that certain clinical isolates of Pseudomonas aeruginosa carry enzymes capable of degrading medically used plastics like polycaprolactone by up to 78% in one week, raising concerns that hospital pathogens could exploit plastic medical devices as a nutrient source while forming more dangerous biofilms.
Preliminary Study On Biodegradation Of Polyethylene By Pseudomonas Aeruginosa
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Laboratory experiments found that Pseudomonas aeruginosa degraded approximately 6% of LDPE film weight over 30 days in Bushnell Haas medium with LDPE as the sole carbon source, likely through enzymatic mechanisms. The results confirm P. aeruginosa's potential for polyethylene biodegradation as a more sustainable alternative to incineration and landfilling, with further optimization needed for practical application.
Harnessing the Plastic-degrading Potential of Pseudomonas Species for Environmental Sustainability
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This review examines Pseudomonas bacteria and their enzymes as candidates for breaking down plastics in the environment, noting that while these bacteria show promise, the catalytic efficiency of known plastic-degrading enzymes is too low and the mechanisms too poorly understood to achieve complete degradation. Incomplete biodegradation is itself a concern because partial breakdown of plastics generates microplastic fragments rather than eliminating them.
Characterization and engineering of plastic-degrading polyesterases jmPE13 and jmPE14 from Pseudomonas bacterium
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Two new plastic-degrading polyesterases, jmPE13 and jmPE14, were characterized and engineered from Pseudomonas strains to improve their efficiency in hydrolyzing polyester plastics. The study aimed to develop higher-performance biocatalysts for the enzymatic upcycling of plastic waste.
Biodegradation of Plastic Polymers by Pseudomonas
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This Spanish-language literature review examines the mechanisms, methods, and techniques by which Pseudomonas bacteria degrade plastics. The review identifies specific enzyme pathways and bacterial strains with potential for bioremediation of plastic pollution in water and soil.
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