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Practical Magic  /  Economics

A super-enzyme found in compost can eat through plastic bottles three times faster than anything else.

We’ve been struggling for decades to find a biological way to recycle plastic that is actually efficient enough to use. Scientists just engineered a heat-loving enzyme from compost bacteria that can tear apart untreated plastic bottles with incredible speed. When paired with another enzyme, it increased the breakdown of post-consumer plastic by 3-fold compared to previous methods. This isn't just a lab curiosity; it works on the actual, dirty plastic bottles people throw in the trash. It could turn plastic from a permanent pollutant into a circular resource that we can break down and reuse forever. We're finally finding nature's way to clean up our mess.

Original Paper

Discovery and engineering of a compost-derived thermophilic BHETase for enhanced depolymerization of post-consumer PET

Xiaoli Zhou, Xian Li, Yi Zang, Lian Zhou, Guangda Feng, Ming-Rong Deng, Honghui Zhu

SSRN  ·  6578016

The accumulation of polyethylene terephthalate (PET) waste urgently demands sustainable recycling technologies. Enzymatic depolymerization represents an eco-friendly approach, but its efficiency is frequently hampered by product inhibition, as accumulated oligomeric intermediates such as bis-(2-hydroxyethyl) terephthalate (BHET) suppress the activity of backbone-degrading PET hydrolases. Herein, we report the identification and engineering of a thermophilic BHETase from a compost-derived thermop