Plastic-eating bacteria discovered

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A global study by University scientists has revealed that marine microbes are widespread and genetically primed to consume polyethylene terephthalate, a durable plastic used in everyday items.

The bacteria's unique ability stems from a distinct structural element in the plastic-degrading enzyme called PETase. This feature, known as the M5 motif, acts as a molecular signature that signals when the enzyme can break down PET.

The Evolution of Natural Recycling Plants

For years, scientists around the world believed that PET was almost impossible to break down naturally. But in 2016, bacteria discovered at a Japanese recycling plant were found to survive by consuming plastic waste. At the time, it was unclear whether underwater bacteria had evolved a similar ability.

Global spread of plastic-eating microbes

To understand the prevalence of enzymes, scientists examined more than 400 ocean samples taken from around the world. They found that unique enzymes were found in 80 percent of the samples. At great depths, this ability would give the bacteria a key survival advantage.

Turning discoveries into real-world solutions

Breakthrough discoveries showing bacteria's ability to digest plastic could accelerate progress towards sustainable recycling. PET-degrading enzymes that spontaneously evolved in the deep sea provide a model that can be optimized in the lab for use in effectively breaking down plastics in wastewater treatment plants.

Source: ScienceDaily, Editorial Weathersunshine.com