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Updated: Jul 3, 2026
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A Toolkit to Enable Hydrocarbon Conversion in Aqueous Environments
Published on: October 2, 2012
Engineering environmental bacteria for whole-cell PET hydrolysis and assimilation
Alice M Banks1, Umar Abdulmutalib2, Brooke Wain3
1Department of Life Sciences, Imperial College London, South Kensington, London SW7 2AZ, UK.
Trends in Biotechnology
|July 1, 2026
Summary
Researchers engineered Pseudomonas umsongensis to degrade plastic waste. This bacterium directly utilizes polyethylene terephthalate (PET) for growth, offering a promising solution for plastic bioremediation and upcycling.
Area of Science:
- Environmental Microbiology
- Biotechnology
- Polymer Science
Background:
- Poly(ethylene terephthalate) (PET) is a widely used plastic, but its accumulation as waste poses significant environmental and health risks.
- Current methods for PET degradation often rely on in vitro enzymatic approaches, with limited development of whole-cell microbial systems for direct PET assimilation, especially from challenging waste streams.
Purpose of the Study:
- To engineer an environmental bacterium capable of directly utilizing and degrading polyethylene terephthalate (PET) as a growth substrate.
- To enhance PET bioavailability and microbial hydrolysis efficiency for potential bioremediation and upcycling applications.
Main Methods:
- Isolation and genetic engineering of Pseudomonas umsongensis to metabolize terephthalic acid and secrete the PET hydrolase, polyester hydrolase Leipzig 7.
- Development of a solvent-based pretreatment method to increase PET substrate bioavailability by creating an amorphous, macroporous structure.
- Evaluation of the engineered strain's ability to utilize and hydrolyze PET for self-sustaining growth, including in non-sterile wastewater conditions.
Main Results:
- The engineered Pseudomonas umsongensis strain demonstrated direct assimilation and hydrolysis of PET, supporting microbial growth.
- Solvent-based pretreatment successfully enhanced PET bioavailability, facilitating degradation.
- The engineered bacterium survived and effectively hydrolyzed PET microplastics in non-sterile wastewater environments.
Conclusions:
- Engineered Pseudomonas umsongensis provides a viable whole-cell system for direct PET assimilation and degradation.
- The developed approach shows potential for effective bioremediation of PET microplastics and sustainable upcycling of plastic waste.
- Further research into optimizing microbial systems for plastic degradation can address the global challenge of plastic pollution.
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