We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Archaea-driven bioremediation of polyolefins and polyesters in extreme environments
AI summary Read the abstract
Scientists have found that ancient microbes called archaea, which thrive in extreme places like deep-sea trenches, produce enzymes that can break down tough plastics like PET (used in bottles) — sometimes as well as or better than bacteria currently being studied for plastic cleanup. This matters because plastic pollution, including microplastics now found in oceans, soil, and even our bodies, is notoriously hard to break down, and these newly discovered microbes could offer fresh tools for tackling plastic waste in places previously thought too harsh for biological cleanup. This paper reviews existing research on the topic rather than presenting new
Global plastic production surpassed 436 million metric tonnes in 2023, with polyolefins, polyethylene and polypropylene, and polyesters, polyethylene terephthalate and polybutylene adipate terephthalate dominating the persistent fraction. In extreme environments, these recalcitrant polymers accumulate rapidly: hadal-trench sediments contain microplastic abundances of 71.1 items per kilogram dry weight, while bottom waters reach 2.06–13.51 particles per litre. Abiotic degradation is severely limited by hydrostatic pressure, hypersalinity, low temperature, and anaerobiosis. Although bacterial and fungal pathways have received primary attention, archaea adapted to polyextreme conditions represent an underexplored resource. Landmark discoveries include PET46, a lid-containing feruloyl esterase from uncultured Candidatus Bathyarchaeota in Guaymas Basin deep-sea sediments that hydrolyses semi-crystalline polyethylene terephthalate powder at rates comparable to established bacterial PETases while outperforming them on oligomers. Subsequent metagenomic prospecting identified GuaPA, a distinct Bathyarchaeia -derived PETase capable of film depolymerisation. Deep-sea plastispheres, hypersaline basins, and extraterrestrial analog sites further reveal archaeal colonisation and metabolic versatility. This review synthesises metagenomic, enzymatic, and community-level evidence, critically evaluates archaeal advantages relative to bacteria and fungi, addresses persistent gaps, including limited polyolefin mineralisation and cultivation bias, and outlines priorities for enzyme engineering and consortia design. The work advances sustainable bioremediation strategies aligned with climate-action goals and circular-economy frameworks in extreme and space environments.
More Papers Like This
The first archaeal PET-degrading enzyme belongs to the feruloyl-esterase family
AI summary Read the abstract
Researchers discovered the first archaeal enzyme capable of degrading polyethylene terephthalate (PET) plastic, belonging to the feruloyl-esterase family. Previously, all known plastic-degrading enzymes came from bacteria or fungi. This finding opens new possibilities for using microorganisms from extreme environments in plastic biodegradation and recycling.
An archaeal lid-containing feruloyl esterase degrades polyethylene terephthalate
AI summary Read the abstract
Researchers identified the first known archaeal enzyme capable of degrading polyethylene terephthalate (PET), a major plastic pollutant found worldwide. The enzyme, called PET46, comes from a deep-sea archaeon and showed degradation activity on PET comparable to previously known bacterial enzymes. The study expands the known diversity of plastic-degrading enzymes and suggests that organisms from extreme environments may harbor useful tools for addressing plastic pollution.
Enrichment of potential polyvinyl chloride and polycarbonate microplastic-degrading bacteria and their distribution characteristics in deep-sea cold seep
AI summary Read the abstract
Scientists discovered bacteria living in deep-sea "cold seep" environments (areas where gas and fluids leak from the ocean floor) that can actually break down PVC and polycarbonate plastics—two common types of microplastics found in packaging, pipes, and consumer goods. This matters because microplastics have been found throughout our food chain and even in human bodies, so identifying natural microbes that degrade these pollutants could eventually lead to new tools for cleaning up plastic waste before it accumulates further in the environment we depend on. That said, this is early-stage research showing these bacteria *can* break down plastic in control
Metagenomic insights into potential PET hydrolases from Antarctic soils and rhizospheres
AI summary Read the abstract
Scientists digging through Antarctic soil found microbes carrying genes for enzymes that can potentially break down PET plastic (the material used in water bottles) — and remarkably, these enzymes work in cold conditions, unlike most known plastic-eating enzymes that need warmth. This matters because it could lead to more practical, energy-efficient ways to recycle plastic waste, which is increasingly breaking down into microplastics that end up in our food, water, and bodies. That said, this is early-stage lab research — these are promising gene candidates identified through computer modeling, not yet proven plastic-eating enzymes ready for
Plastic degradation by enzymes from uncultured deep sea microorganisms
AI summary Read the abstract
Researchers mined deep-sea metagenomic data to discover novel PET-degrading enzymes (PETases) from uncultured microorganisms, expanding the known diversity of plastic-degrading enzymes beyond the bacteria-focused pipelines that have previously dominated this field.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.