Fungal enzymes for the degradation of polyethylene: Molecular docking simulation and biodegradation pathway proposal

Santacruz-Juárez, Ericka; Buendia-Corona, Ricardo E.; Ramírez, Raúl Madrid; Sánchez, Carmen

doi:10.1016/j.jhazmat.2021.125118

Cited by 74 publications

(31 citation statements)

References 60 publications

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“…These new technologies once more highlight the importance of the development of specifically devised new microorganisms and enzymes for plastic depolymerization. In this connection, Santacruz Juarez and coworkers reported the use of molecular docking simulation to predict affinity, strength, and binding energy between two molecules to analyze the activity of laccase (Lac), manganese peroxidase (MnP), lignin peroxidase (LiP), and unspecific peroxygenase (UnP), thereby helping in the development of new enzymes [152]. Data achieved showed that synergic enzymatic combination, as it normally happens in nature, boosts the catalytic efficiency by promoting sequential degradation processes.…”

Section: Enzymatic Catalysismentioning

confidence: 99%

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

et al. 2021

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Today, the scientific community is facing crucial challenges in delivering a healthier world for future generations. Among these, the quest for circular and sustainable approaches for plastic recycling is one of the most demanding for several reasons. Indeed, the massive use of plastic materials over the last century has generated large amounts of long-lasting waste, which, for much time, has not been object of adequate recovery and disposal politics. Most of this waste is generated by packaging materials. Nevertheless, in the last decade, a new trend imposed by environmental concerns brought this topic under the magnifying glass, as testified by the increasing number of related publications. Several methods have been proposed for the recycling of polymeric plastic materials based on chemical or mechanical methods. A panorama of the most promising studies related to the recycling of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polystyrene (PS) is given within this review.

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Section: Enzymatic Catalysismentioning

confidence: 99%

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

et al. 2021

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“…An alternative for obtaining bioplastics from microbial polyesters, with guaranteed polymer biodegradability, is the use of enzymes and microorganisms capable of catalyzing the breakdown of lignin. The main enzymes involved in lignin oxidoreduction are laccases (Lac), lignin peroxidase (LiP), and manganese peroxidase (MnP) [82], and the recently discovered enzymes dye-decolorizing peroxidases and unspecific peroxygenase [134,135].…”

Section: Effect Of the Bio-based Polymer Addition On The Biodegradation Rate Of Phas Bioplasticsmentioning

confidence: 99%

“…LiP has a key role in the degradation of lignin, due to the distinct characteristics of the active site of the enzyme. However, the catalytic action of LiP is mediated by H 2 O 2 , which is generated by Lac [135]. The effectiveness of the microorganisms is essential for the biodegradation of PHA/lignin blends, as some microorganisms such as Phanerochaete chrysosporium are considered excellent for the degradation of lignin [134,136].…”

Section: Effect Of the Bio-based Polymer Addition On The Biodegradation Rate Of Phas Bioplasticsmentioning

confidence: 99%

Biodegradation of Hemicellulose-Cellulose-Starch-Based Bioplastics and Microbial Polyesters

2021

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The volume of discarded solid wastes, especially plastic, which accumulates in large quantities in different environments, has substantially increased. Population growth and the consumption pattern of societies associated with unsustainable production routes have caused the pollution level to increase. Therefore, the development of materials that help mitigate the impacts of plastics is fundamental. However, bioplastics can result in a misunderstanding about their properties and environmental impacts, as well as incorrect management of their final disposition, from misidentifications and classifications. This chapter addresses the aspects and factors surrounding the biodegradation of bioplastics from natural (plant biomass (starch, lignin, cellulose, hemicellulose, and starch) and bacterial polyester polymers. Therefore, the biodegradation of bioplastics is a factor that must be studied, because due to the increase in the production of different bioplastics, they may present differences in the decomposition rates.

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“…The initial and rate-determining step is the oxidation of PE by some oxidative enzymes such as peroxidase, oxygenase and laccase [15,36,37], which leading to a reduction of molecular weight. After the oxidation, the PE polymer is destructed, the molecular weight decreases, and carbonyl groups are introduced along the polyethylene chain.…”

Section: A Proposed Model Of Biodegradation Process Of Pementioning

confidence: 99%

“…Recently, biodegradation using microorganisms has become a promising alternative for plastic recycling due to the mild and environmentally friendly reaction conditions required [14]. Among these microbes, fungi are potentially effective for the degradation of environmental PE [15][16][17][18]. Generally, fungi as well as other microbes are involved in the depolymerization, assimilation and mineralization processes of plastic degradation along with the involvement of a set of enzymatic system responsible for diverse steps including colonization, degradation, transformation and utilization [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

A marine fungus efficiently degrades polyethylene

Gao

Liu

Sun

2021

Preprint

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Plastics pollution has been a global concern. Huge quantities of polyethylene (PE), the most abundant and refractory plastic in the world, have been accumulating in the environment causing serious ecological problems. However, the paucity of microorganisms and enzymes that efficiently degrading PE seriously impedes the development of bio-products to eliminate this environmental pollution. Here, by screening hundreds of plastic waste-associated samples, we isolated a fungus (named Alternaria sp. FB1) that possessing a prominent capability of colonizing, degrading and utilizing PE. Strikingly, the molecular weight of PE film decreased 95% after the fungal treatment. Using GC-MS, we further clarified that a four-carbon product (named Diglycolamine) accounted for 93.28% of all degradation products after the treatment by strain FB1. We defined potential enzymes that involved in the degradation of PE through a transcriptomic method. The degradation capabilities of two representative enzymes including a laccase and a peroxidase were verified. Lastly, a complete biodegradation process of PE is proposed. Our study provides a compelling candidate for further investigation of degradation mechanisms and development of biodegradation products of PE.

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Fungal enzymes for the degradation of polyethylene: Molecular docking simulation and biodegradation pathway proposal

Cited by 74 publications

References 60 publications

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

Biodegradation of Hemicellulose-Cellulose-Starch-Based Bioplastics and Microbial Polyesters

A marine fungus efficiently degrades polyethylene

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