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Related Experiment Video

Updated: Jan 17, 2026

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
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Microbial plastic degradation: enzymes, pathways, challenges, and perspectives.

Pablo Pérez-García1, Katharina Sass2, Sasipa Wongwattanarat1

  • 1Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany.

Microbiology and Molecular Biology Reviews : MMBR
|September 19, 2025
PubMed
Summary
This summary is machine-generated.

Microbiologists are discovering enzymes and microbes that degrade plastics like PET and PUR. However, efficient biodegradation of persistent polymers like PE and PVC remains a significant challenge, hindering plastic recycling efforts.

Keywords:
Ideonella (Piscinibacter) sakaiensisLatex-Clearing Protein (LCP)Leaf-Compost Cutinase, LCCMHETasePETasebioplasticsmicroplasticsnanoplasticsnylonaseoxygenaseplastic degradationpolyamide (PA)polycarbonate (PC)polyethylene terephthalate (PET)polylactic acid (PLA)polyolefins (PE, PP)polyurethane (PU)rubberurethanasevinyl polymers (PS, PVC)

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Area of Science:

  • Microbiology
  • Biotechnology
  • Environmental Science

Background:

  • Synthetic polymers (plastics) are ubiquitous in modern life, essential for various industries but posing significant environmental challenges due to their persistence.
  • Approximately 80% of the 400-450 million tons of plastics produced annually end up in the environment, persisting for centuries due to poor biodegradability.
  • Identifying microorganisms and enzymes capable of degrading common plastics is a critical challenge in mitigating plastic pollution.

Purpose of the Study:

  • To summarize current knowledge on microbial degradation pathways and enzymes for various plastics, including polyethylene terephthalate (PET), polyamides (PA), polyurethanes (PUR), and polycarbonates (PC).
  • To highlight challenges in discovering efficient microbial degraders for persistent commodity polymers like polyethylene (PE) and polypropylene (PP).
  • To review methods for discovering plastic-degrading microorganisms and enzymes and discuss biotechnological applications in plastic recycling.

Main Methods:

  • Literature review of microbial pathways and enzymes involved in plastic degradation.
  • Summary of known plastic-active enzymes and microbial phyla.
  • Discussion of methods for discovering novel microorganisms and enzymes and quantifying biodegradation activity.

Main Results:

  • Over 255 functionally verified plastic-active enzymes from diverse microbial phyla are known.
  • Established microbial degradation pathways exist for PET, PA oligomers, ester-based PUR, and PC.
  • Significant challenges remain in finding efficient microbial degraders for highly persistent polymers (PE, PP, PVC, PS, etc.).

Conclusions:

  • Microbial degradation offers a promising avenue for plastic recycling, with notable progress in degrading certain polymer types.
  • Further research is crucial to identify and engineer microbes and enzymes capable of efficiently degrading recalcitrant plastics.
  • Biotechnological applications hold potential for developing sustainable solutions to the global plastic waste crisis.