Chomp! Scientists Find a ‘Pac-Man’ Enzyme That Eats Plastic
Quick Summary
Scientists in Germany discovered a special enzyme inside bacteria that can munch through certain types of plastic. They named it the Pac-Man enzyme because of the way it looks and works. This tiny discovery could be a big help in the fight against plastic pollution.
What Happened?
Researchers at the University of Konstanz in Germany were studying bacteria in forest soil. They wanted to understand how tiny living things break down biodegradable plastic — plastic that is designed to fall apart over time.
Inside the bacteria, they found something special: a new type of enzyme. An enzyme is a tiny protein that acts like a tool. This one had an unusually wide opening that allowed it to chomp onto plastic molecules and break them apart. It reminded the scientists so much of the famous video game character Pac-Man that they gave it that nickname: the Pac-Man enzyme.
The enzyme attaches to the outside of a bacterium, like a tool clipped to a worker’s belt. Then it reaches out and breaks apart the long chains that make up certain plastics. It is a bit like someone pulling apart a Lego tower one brick at a time.
In tests, certain biodegradable plastics placed in forest soil broke down completely in roughly 250 to 330 days — less than one year. That is remarkable because regular plastics can take hundreds of years to disappear.
The scientists also noticed something surprising: the Pac-Man enzyme looks very similar to another type of bacterial enzyme that helps bacteria resist antibiotics. That connection could help scientists understand how antibiotic resistance spreads in nature, which is another big problem scientists are working hard to solve.
Why Does It Matter?
Plastic pollution is one of the biggest challenges facing our planet. Billions of pieces of plastic end up in oceans, rivers, forests, and landfills every year. Many of them take 400 to 1,000 years to break down on their own.
Finding a natural enzyme that helps bacteria eat certain plastics gives scientists a new idea: could we design better, faster-disappearing plastics — ones that bacteria can easily digest?
This discovery also gives us a new way to think about biodegradable packaging. If more plastics were made from materials that the Pac-Man enzyme can break down, they might disappear from the environment much more quickly. That would be great news for wildlife and for clean oceans.
Scientists say this finding is a new foundation for future research. The Pac-Man enzyme may only work on certain kinds of plastic for now, but it opens a door to many more discoveries.
Big Words
- Enzyme — a tiny natural protein that acts like a tool inside living things, speeding up chemical reactions
- Biodegradable — able to be broken down naturally by living things like bacteria or fungi
- Polymer — a very long chain of repeating molecules; plastic is made of polymers
- Antibiotic resistance — when bacteria become able to survive medicines designed to kill them
- Microbial — having to do with microbes, which are tiny living things too small to see without a microscope
Fun Fact
The Pac-Man enzyme gets its name from the classic 1980 video game where a round yellow character chomps through a maze eating dots. The enzyme’s wide, open active site reminded scientists of Pac-Man’s famous wide-open mouth!
Think About It
If you could design the perfect eco-friendly material to replace plastic bags, what would it be made of — and how quickly would you want it to break down in nature?
Sources
- ScienceDaily / University of Konstanz — Scientists discover a plastic-eating ‘Pac-Man’ enzyme with a surprising secret (Oct 16, 2026)
- EurekaAlert / University of Konstanz — An enzyme with potential: New type of plastic-degrading enzyme discovered in bacteria (2026)
- NewsBytesApp — German scientists find ‘Pac-Man enzyme’ chewing some plastics and penicillin (Oct 16, 2026)
- Impactful Ninja — How a ‘Pac-Man’ Bacterial Enzyme Breaks Down Plastic (Oct 7, 2026)