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Related Concept Videos

Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
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Fluorimetric high-throughput screening method for polyester hydrolase activity using polyethylene terephthalate

Lara Pfaff1, Daniel Breite2, Christoffel P S Badenhorst1

  • 1Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Greifswald, Germany.

Methods in Enzymology
|February 13, 2021
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Summary

A new high-throughput screening assay enables efficient detection of polyethylene terephthalate (PET)-hydrolyzing enzymes. This method accelerates the discovery of biocatalysts for eco-friendly plastic recycling.

Keywords:
FluorimetryHigh-throughput screeningNanoparticlesPolyester hydrolasesPolyethylene terephthalate

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Area of Science:

  • Biocatalysis and enzyme engineering
  • Polymer science and recycling technologies
  • Environmental biotechnology

Background:

  • Biocatalysis offers an eco-friendly approach to polyethylene terephthalate (PET) waste recycling.
  • Limited high-throughput screening assays for PET-hydrolyzing activity hinder the discovery of industrial-scale enzymes.
  • Developing efficient screening methods is crucial for advancing plastic biodegradation.

Purpose of the Study:

  • To describe a novel high-throughput screening assay for PET hydrolase activity.
  • To enable rapid identification and characterization of enzymes for plastic recycling.
  • To facilitate the discovery of novel biocatalysts for polyethylene terephthalate (PET) degradation.

Main Methods:

  • Development of a 96-well microtiter plate assay for terephthalate detection.
  • Utilizing PET nanoparticles derived from food packaging as a substrate.
  • Employing Fenton chemistry-mediated fluorimetric detection for enzyme activity assessment.
  • Using crude cell lysates obtained via a freeze-thaw protocol.

Main Results:

  • Successfully distinguished active thermophilic PET hydrolase from inactive variants.
  • Demonstrated the assay's effectiveness with PET nanoparticles from waste food packaging.
  • Validated the assay's applicability for screening mutant libraries of PET hydrolases.

Conclusions:

  • The developed assay is a powerful tool for screening PET hydrolases.
  • This method will accelerate the identification of enzymes for effective plastic waste recycling.
  • Facilitates the discovery of biocatalysts for industrial-scale polyethylene terephthalate (PET) recycling.