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61,005 resultsShowing papers similar to Investigation of the halophilic PET hydrolase PET6 from Vibrio gazogenes
ClearBreakdown of polyethylene therepthalate microplastics under saltwater conditions using engineered Vibrio natriegens
Scientists engineered a marine bacterium, Vibrio natriegens, to break down PET plastic into its basic chemical building blocks in saltwater conditions at moderate temperatures. The engineered bacteria display enzymes on their cell surface that can depolymerize PET without needing any pretreatment of the plastic. This biological approach could eventually help address ocean microplastic pollution, though significant work remains to scale the technology from the laboratory to real-world applications.
Engineered Vibrio natriegens as a living biocatalyst for in-situ biodegradation of microplastics in seawater
Researchers engineered the fast-growing marine bacterium Vibrio natriegens to display PETase enzymes on its outer membrane, creating a living biocatalyst that degrades PET microplastics directly in seawater conditions, outperforming comparable E. coli-based systems in both growth rate and hydrolytic activity. This halophilic whole-cell approach addresses a key gap in bioremediation — most PETase studies use freshwater organisms that cannot survive the salinity of marine environments where plastic pollution is most severe.
Marine PET Hydrolase (PET2): Assessment of Terephthalate- and Indole-Based Polyesters Depolymerization
Researchers characterized a marine enzyme (PET2) capable of breaking down PET plastic and related polyester materials under relatively mild conditions. Discovering and engineering enzymes that can degrade PET could help address the massive accumulation of PET microplastics in ocean environments.
Bioprospecting for polyesterase activity relevant for PET degradation in marine Enterobacterales isolates
Researchers screened marine Enterobacterales isolates for polyesterase activity capable of degrading PET plastic, identifying bacterial strains from marine environments as candidates for bioremediation strategies targeting one of the world's most problematic plastic pollutants.
Marine PET Hydrolase (PET2): Assessment of Terephthalate- and Indole-Based Polyester Depolymerization
This study characterized a marine-derived enzyme (PET2) capable of breaking down PET plastic under mild conditions, assessing its efficiency for enzymatic recycling. Enzyme-based PET recycling could prevent plastic waste from fragmenting into the microplastics that accumulate in oceans and organisms.
An archaeal lid-containing feruloyl esterase degrades polyethylene terephthalate
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.
Using a marine microalga as a chassis for polyethylene terephthalate (PET) degradation
Researchers genetically engineered a marine microalgae to produce enzymes that break down PET plastic (the kind used in bottles and synthetic fibers), demonstrating for the first time that a saltwater microalgae can be used as a biological platform for PET degradation. This proof-of-concept points toward eco-friendly, ocean-based solutions for tackling plastic pollution at its source.
Marine hydrocarbon-degrading bacteria breakdown poly(ethylene terephthalate) (PET)
Scientists used microcosm studies to investigate whether marine hydrocarbon-degrading bacteria can break down PET plastic, finding that specific bacterial strains could colonize and degrade PET surfaces, offering insights into natural plastic biodegradation in the ocean.
Identification of BgP, a Cutinase-Like Polyesterase From a Deep-Sea Sponge-Derived Actinobacterium
Researchers identified BgP, a cutinase-like polyesterase enzyme from a deep-sea sponge-derived actinobacterium, which can hydrolyze synthetic polyesters including PET plastic, highlighting marine bacteria as a promising source of plastic-degrading enzymes.
A Novel Polyester Hydrolase From the Marine Bacterium Pseudomonas aestusnigri – Structural and Functional Insights
Researchers characterized a novel polyester hydrolase from the marine bacterium Pseudomonas aestusnigri and solved its crystal structure, finding the enzyme can degrade PET and other polyesters, offering new insights into marine plastic biodegradation mechanisms.
An archaeal lid-containing feruloyl-esterase degrades polyethylene terephthalate (PET)
This study identified the first archaeal enzyme capable of degrading PET plastic, characterizing its structure and biochemical properties. Expanding the diversity of organisms with PET-degrading enzymes could accelerate the development of biological strategies for breaking down the microplastics contaminating marine and terrestrial environments.
Eco-Microbiology: Discovering Biochemical Enhancers of PET Biodegradation by Piscinibacter sakaiensis
This paper reviews biochemical strategies for enhancing PET biodegradation by microorganisms, focusing on the discovery and engineering of plastic-degrading enzymes. The review highlights recent advances and remaining challenges in scaling up enzymatic plastic degradation for industrial applications.
Message in a Bottle: the Expression and Confirmation of ISF6_4831, a Polyethylene Terephthalate Hydrolase
This study investigated a bacterial enzyme that can degrade polyethylene terephthalate (PET) plastic bottles, one of the top sources of plastic waste globally. The research confirms that biological degradation of PET is feasible and points toward potential biotechnological approaches for breaking down plastic waste.
Explorations of Polyethylene Terephthalate (PET) Hydrolase for addressing PET Plastic Pollution
This review explores the biology of PETase enzymes and their potential for addressing PET plastic pollution, covering the discovery of Ideonella sakaiensis and subsequent enzyme engineering efforts. Developing efficient PET-degrading enzymes is a promising biotechnological strategy for reducing plastic pollution at scale.
A sequence- and structure-based characterization of microbial enzymes identifies P. stutzeri as a plastic-degrading species
Researchers characterized microbial enzymes with potential plastic-degrading capabilities, focusing on PETase and MHETase enzyme systems. The study identified Pseudomonas stutzeri as a species with notable plastic degradation potential, contributing to the growing understanding of biological approaches for addressing plastic pollution through enzymatic bioremediation.
Process development for PETase production and purification
Researchers developed a production and purification process for PETase, an enzyme capable of breaking down polyethylene terephthalate (PET) plastic biologically, as an alternative to inadequate mechanical and chemical recycling methods for mixed and contaminated PET waste. The study addresses the global plastic pollution crisis by advancing the scalability of enzymatic PET degradation as a sustainable recycling pathway.
Biodegradation of PET plastic by a marine strain Rhodococcus pyridinivorans P23 with a membrane anchoring PET esterase in a biofilm model
Researchers isolated a marine bacterium from deep sea sediment that can biodegrade PET plastic using a membrane-anchored enzyme, demonstrating the first marine biofilm-based PET degradation mechanism. Marine microorganisms capable of breaking down plastics in ocean environments could help reduce microplastic accumulation over long timescales.
Enzymatic Degradation of Polyethylene Terephthalate Plastics by Bacterial Curli Display PETase
Researchers engineered bacteria to display a PET-degrading enzyme on their surface, creating a reusable biocatalyst capable of breaking down polyethylene terephthalate plastics. The system worked under various conditions, remained stable for at least 30 days, and could even degrade PET microplastics in wastewater and highly crystalline consumer plastic waste. This biological approach offers a promising environmentally friendly alternative for plastic recycling and waste treatment.
Current Knowledge on Polyethylene Terephthalate Degradation by Genetically Modified Microorganisms
This review covers genetically modified microorganisms engineered to degrade polyethylene terephthalate, examining how bioengineering of enzymes such as PETase and enhanced expression systems can overcome the low biodegradation rates of wild-type microorganisms toward this ubiquitous plastic.
Enzymatic Remediation of Polyethylene Terephthalate (PET)–Based Polymers for Effective Management of Plastic Wastes: An Overview
Enzymatic approaches for remediating PET-based plastic waste were reviewed, covering PETase and related enzymes that can break PET into reusable monomers. Enzyme engineering strategies to improve thermostability and catalytic efficiency are discussed as a pathway to scalable biological PET recycling.
A New PETase from the Human Saliva Metagenome and Its Functional Modification via Genetic Code Expansion in Bacteria
Researchers discovered and engineered a new PETase enzyme from human saliva metagenome data, demonstrating its ability to break down PET plastic. Functional modifications improved its catalytic efficiency, contributing to the development of biological tools for plastic recycling.
Application of PETase in Plastic Biodegradation and Its Synthesis
This review examines how PETase enzymes can be used to biodegrade plastic waste, particularly polyethylene terephthalate, which is one of the most widely used plastics globally. Researchers discuss recent advances in modifying PETase enzymes for improved efficiency and establishing sustainable synthesis platforms. The study suggests that enzymatic biodegradation offers a promising biological solution to the growing plastic pollution crisis.
Current knowledge on enzymatic PET degradation and its possible application to waste stream management and other fields
This review distinguished between enzymatic PET surface modification (useful for fiber treatment) and enzymatic PET degradation (needed for waste management), cataloguing the hydrolases capable of each function and the conditions required. The authors evaluate the prospects for deploying PET-degrading enzymes in industrial plastic waste streams.
An Overview into Polyethylene Terephthalate (PET) Hydrolases and Efforts in Tailoring Enzymes for Improved Plastic Degradation
This review examines the discovery and engineering of PET-degrading enzymes including PETase and cutinase variants, discussing protein engineering strategies to improve catalytic efficiency and thermostability for practical biodegradation of polyethylene terephthalate plastic waste.