Degradation of Polycyclic Aromatic Hydrocarbons (PAHs) by Laccase in Rhamnolipid Reversed Micellar System

Peng, Xin; Liu, Huan; Zeng, Guangming; Chen, Xiaohong

doi:10.1007/s12010-015-1508-3

Cited by 28 publications

(11 citation statements)

References 36 publications

(24 reference statements)

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“…The type 2 copper does not present visible absorbance, while the type 3 coppers have an absorption maximum at 330 nm (Mester and Tien, 2000;ten Have and Teunissen, 2001). It was demonstrated that, in the presence of suitable mediators, laccase is capable to oxidize a considerably larger range of compounds, such as PAHs (Peng et al, 2015).…”

Section: Characteristics Of Laccasementioning

confidence: 99%

“…xenobiotic and phenolic lignin model compounds Peng et al, 2015). Earlier, its application was limited because of the low oxidation potential, thus, in the presence of an appropriate mediator; laccases show higher oxidation capability resulting in numerous biotechnological applications involving oxidation of non-phenolic lignin compounds and detoxification of various environmental pollutants (Upadhyay et al, 2016;Khambhaty et al, 2015).…”

Section: Mediators Of Laccasementioning

confidence: 99%

“…Laccases are known to catalyze the oxidation of a significant variety of phenolic compounds and aromatic amines (Peng et al, 2015). When certain substrates can potentially provide two electrons such as ABTS, laccases carry out one-electron oxidation.…”

Section: Catalytic Cycle Of Laccasementioning

confidence: 99%

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Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by fungal enzymes: A review

Kadri

Rouissi

Brar

et al. 2017

Journal of Environmental Sciences

354

118

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Polycyclic aromatic hydrocarbons (PAHs) are a large group of chemicals. They represent an important concern due to their widespread distribution in the environment, their resistance to biodegradation, their potential to bioaccumulate and their harmful effects. Several pilot treatments have been implemented to prevent economic consequences and deterioration of soil and water quality. As a promising option, fungal enzymes are regarded as a powerful choice for degradation of PAHs. Phanerochaete chrysosporium, Pleurotus ostreatus and Bjerkandera adusta are most commonly used for the degradation of such compounds due to their production of ligninolytic enzymes such as lignin peroxidase, manganese peroxidase and laccase. The rate of biodegradation depends on many culture conditions, such as temperature, oxygen, accessibility of nutrients and agitated or shallow culture. Moreover, the addition of biosurfactants can strongly modify the enzyme activity. The removal of PAHs is dependent on the ionization potential. The study of the kinetics is not completely comprehended, and it becomes more challenging when fungi are applied for bioremediation. Degradation studies in soil are much more complicated than liquid cultures because of the heterogeneity of soil, thus, many factors should be considered when studying soil bioremediation, such as desorption and bioavailability of PAHs. Different degradation pathways can be suggested. The peroxidases are heme-containing enzymes having common catalytic cycles. One molecule of hydrogen peroxide oxidizes the resting enzyme withdrawing two electrons. Subsequently, the peroxidase is reduced back in two steps of one electron oxidation. Laccases are copper-containing oxidases. They reduce molecular oxygen to water and oxidize phenolic compounds.

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Section: Characteristics Of Laccasementioning

confidence: 99%

Section: Mediators Of Laccasementioning

confidence: 99%

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Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by fungal enzymes: A review

Kadri

Rouissi

Brar

et al. 2017

Journal of Environmental Sciences

354

118

View full text Add to dashboard Cite

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“…strain S133 in malt extract agar (Hadibarata and Kristanti 2012a, b). Likewise, Lac produced by Aureobasidium pullulans could degrade 20% of pyrene present in the culture medium (Peng et al 2015), and Lac activity of Pseudotramete gibbosa could reach 2841 U L −1 when cultivated under optimal conditions, with corresponding degradation efficiencies reaching 24.3% for pyrene (Chen 2008). Moreover, several publications have demonstrated that white-rot fungus produces Lac when cultivated in the presence of PAHs and have pointed out the importance of this enzyme in degradation of PAHs.…”

Section: Resultsmentioning

confidence: 99%

Ligninolytic enzyme involved in removal of high molecular weight polycyclic aromatic hydrocarbons by Fusarium strain ZH-H2

Zhang

Wang

et al. 2020

Environ Sci Pollut Res

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The capacity of Fusarium sp. strain ZH-H2 to secret lignin peroxidase (LiP), laccase (Lac), and manganese peroxidase (MnP) and degrade high molecular weight polycyclic aromatic hydrocarbons (HMW-PAHs) was studied. When the fungus was grown in control mineral salt medium for 4 days, LiP and Lac activities were detected at 8871 U L −1 and 5123 U L −1 , respectively. In the presence of HMW-PAHs as the sole carbon source, only LiP activity was detectable, and LiP activity had significantly reduced HMW-PAHs at day 7, with a maximum decrease of 85.9%. A strong correlation between LiP activity and HMW-PAHs removal efficiency could be fit into various models, with the highest correlation coefficients obtained for quadratic functions (P < 0.01). When a specific enzyme inhibitor was added, the ability of Fusarium to remove HMW-PAHs was reduced from 85.9 to 66.7%, depending on the inhibitor's concentration. Meanwhile, the determined activity of LiP was reduced from 11.4 to 48.6%. We conclude that in the presence of HMW-PAHs as the only carbon source to support growth, Fusarium ZH-H2 mainly produces LiP but not Lac or MnP for HMW-PAHs degradation. To our knowledge, it was the first time to propose a metabolic lignin peroxidase characterization of HMW-PAHs degradation by Fusarium sp. strains.

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“…The amount of secretory laccases in R. mackenziei is consistent with what was recently described for black yeasts of the genus Fonsecaea ( Moreno et al 2017 ). Laccases may catalyze the oxidation of phenolic compounds and aromatic amines ( Peng et al 2015 ). The most abundant secreted peptidases belong to the S10 family, according to MEROPS (a proteolytic enzyme database), which contains a variable set of carboxypeptidases.…”

Section: Discussionmentioning

confidence: 99%

Genomic Understanding of an Infectious Brain Disease from the Desert

Moreno

Ahmed

Brankovics

et al. 2018

G3 Genes|Genomes|Genetics

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Rhinocladiella mackenziei accounts for the majority of fungal brain infections in the Middle East, and is restricted to the arid climate zone between Saudi Arabia and Pakistan. Neurotropic dissemination caused by this fungus has been reported in immunocompromised, but also immunocompetent individuals. If untreated, the infection is fatal. Outside of humans, the environmental niche of R. mackenziei is unknown, and the fungus has been only cultured from brain biopsies. In this paper, we describe the whole-genome resequencing of two R. mackenziei strains from patients in Saudi Arabia and Qatar. We assessed intraspecies variation and genetic signatures to uncover the genomic basis of the pathogenesis, and potential niche adaptations. We found that the duplicated genes (paralogs) are more susceptible to accumulating significant mutations. Comparative genomics with other filamentous ascomycetes revealed a diverse arsenal of genes likely engaged in pathogenicity, such as the degradation of aromatic compounds and iron acquisition. In addition, intracellular accumulation of trehalose and choline suggests possible adaptations to the conditions of an arid climate region. Specifically, protein family contractions were found, including short-chain dehydrogenase/reductase SDR, the cytochrome P450 (CYP) (E-class), and the G-protein β WD-40 repeat. Gene composition and metabolic potential indicate extremotolerance and hydrocarbon assimilation, suggesting a possible environmental habitat of oil-polluted desert soil.

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Degradation of Polycyclic Aromatic Hydrocarbons (PAHs) by Laccase in Rhamnolipid Reversed Micellar System

Cited by 28 publications

References 36 publications

Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by fungal enzymes: A review

Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by fungal enzymes: A review

Ligninolytic enzyme involved in removal of high molecular weight polycyclic aromatic hydrocarbons by Fusarium strain ZH-H2

Genomic Understanding of an Infectious Brain Disease from the Desert

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