Targeting microplastic particles in the void of diluted suspensions

Area of Science:

• Environmental Science
• Biotechnology
• Polymer Science

Background:

• Microplastic accumulation poses a significant environmental and food chain challenge.
• Polyurethanes are common synthetic polymers with slow natural degradation rates (50-100+ years).
• Limited microbial and enzymatic resources exist for efficient polyurethane degradation.

Purpose of the Study:

• To enhance the degradation efficiency of polyester-polyurethane nanoparticles.
• To investigate the potential of engineered enzymes for accelerated plastic breakdown.

Main Methods:

• Fusion of the anchor peptide Tachystatin A2 with the bacterial cutinase Tcur1278.
• Assessing the degradation rate of polyester-polyurethane nanoparticles using the engineered enzyme.
• Comparing degradation efficiency against wild-type Tcur1278.

Main Results:

• The fused enzyme demonstrated a 6.6-fold acceleration in polyester-polyurethane nanoparticle degradation compared to the wild-type enzyme.
• Degradation half-lives of polyester-polyurethane nanoparticles were reduced from 41.8 h to 6.2 h (6.7-fold).

Conclusions:

• Enzyme engineering by fusing anchor peptides can significantly enhance polyurethane degradation.
• This approach offers a promising strategy for mitigating microplastic pollution from polyurethanes.