Tolerance to trichlorophenols in microorganisms from a polluted and a pristine site of a river

Godoy, Félix A.; Zenteno, Pamela; Cerda, Fabiola; González, Bernardo; Martı́nez, Miguel Ángel

doi:10.1016/s0045-6535(98)00205-7

Cited by 23 publications

(11 citation statements)

References 15 publications

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“…Chlorinated phenols are a major class of environmental pollutants and are potential human carcinogens [1][2][3][4]. They are extensively used as disinfectants, pesticides, herbicides and dyes; as a result they can contaminate the soil and ground water, and eventually enter the food chain.…”

Section: Introductionmentioning

confidence: 99%

Single turnover studies of oxidative halophenol dehalogenation by horseradish peroxidase reveal a mechanism involving two consecutive one electron steps: Toward a functional halophenol bioremediation catalyst

Sumithran

Sono

Raner

et al. 2012

Journal of Inorganic Biochemistry

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Section: Introductionmentioning

confidence: 99%

Single turnover studies of oxidative halophenol dehalogenation by horseradish peroxidase reveal a mechanism involving two consecutive one electron steps: Toward a functional halophenol bioremediation catalyst

Sumithran

Sono

Raner

et al. 2012

Journal of Inorganic Biochemistry

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“…1a, b) the culture could be considered dead after 48 h of incubation according to the level of lethality proposed by [16]. In previous works [2,6], we demonstrated that both strains have the ability to tolerate concentrations equal to or higher than 500 lg ml À1 of 2,4,6-TCP in the presence of an easily metabolizable carbon source. The presence of 50 lg ml À1 246-TCP added to the other organochlorine compounds present in the effluents, detected by CG-EDC (data not shown), may be increasing the effluent antibacterial activity affecting their viability.…”

Section: Resultsmentioning

confidence: 87%

“…chilensis S37 and Wautersia sp. PZK bacterial strains were isolated in previous works [6,15] from a superficial sediment of a river (Biobı´o River, central Chile), 1000 m downstream from where the river receives a non-treated Kraft cellulose pulp mill effluent. Both strains possess the ability to degrade 2,4,6-TCP and accumulate PHAs.…”

Section: Bacterial Strainsmentioning

confidence: 99%

Biosynthesis of poly-β-hydroxyalkanoates by Sphingopyxis chilensis S37 and Wautersia sp. PZK cultured in cellulose pulp mill effluents containing 2,4,6-trichlorophenol

Tobella

Bunster

Pooley

et al. 2005

J IND MICROBIOL BIOTECHNOL

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Poly-beta-hydroxyalkanoates (PHA) polymer is synthesized by different bacterial species. There has been considerable interest in the development and production of biodegradable polymers; however, the high cost of PHA production has restricted its applications. Kraft cellulose industry effluents containing 2,4,6-trichlorophenol (10 or 20 microg ml(-1)) were used by the bacteria Sphingopyxis chilensis S37 and Wautersia sp. PZK to synthesize PHA. In this condition, S. chilensis S37 was able to grow and degrade 2,4,6-trichlorophenol (ca. 60%) and 80% of these cells accumulated PHA. Wautersia PZK completely degraded 2,4,6-TCP and more than 90% of the cells accumulated PHA in 72 h. The PHA detection was performed by flow cytometry and polyester composition was characterized by gas chromatography-mass spectroscopy (GC-MS), indicating that these polymers are made by 3-hydroxybutyric acid and 3-hydroxyhexadecanoic acid for S37 and PZK strains, respectively. Results demonstrated that strains' growth and PHA production and composition are not modified in cellulose effluents with or without 2,4,6-TCP (10-20 microg ml(-1)). Therefore, our results indicate that S. chilensis S37 and Wautersia sp. PZK are able to degrade a toxic compound such as a 2,4,6-TCP and simultaneously produce a valuable biopolymer using low-value substrates.

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“…Moreover, phenols and their derivatives are widely used in industry. In particular, halophenols are commonly used as pesticides or for synthesis of pesticides, which cause damages to the mammalian liver and immune system [2,3]. In addition, halophenols are readily oxidized to produce phenoxy radicals and become potential carcinogens due to the ability of radicals to modify DNA bases [4].…”

Section: Introductionmentioning

confidence: 99%

Rational design of heme enzymes for biodegradation of pollutants toward a green future

Lin

2019

Biotech and App Biochem

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Environmental pollutants, such as industrial dyes and halophenols, are harmful to human health, which urgently demand degradation. Bioremediation has been shown to be a cost‐effective and ecofriendly approach. As reviewed herein, significant progress has been made in the last decade for biodegradation of both industrial dyes and halophenols, by engineering of native dye‐decolorizing peroxidases (DyPs) and dehaloperoxidases (DHPs), and by design of artificial heme enzymes in both native and de novo protein scaffolds. The catalytic efficiency of artificial DyPs and DHPs can be rationally designed comparable to or even beyond those of natural counterparts. The enzymes are on their way from laboratory to industry and will play more crucial roles in environmental protection toward a green future.

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Tolerance to trichlorophenols in microorganisms from a polluted and a pristine site of a river

Cited by 23 publications

References 15 publications

Single turnover studies of oxidative halophenol dehalogenation by horseradish peroxidase reveal a mechanism involving two consecutive one electron steps: Toward a functional halophenol bioremediation catalyst

Single turnover studies of oxidative halophenol dehalogenation by horseradish peroxidase reveal a mechanism involving two consecutive one electron steps: Toward a functional halophenol bioremediation catalyst

Biosynthesis of poly-β-hydroxyalkanoates by Sphingopyxis chilensis S37 and Wautersia sp. PZK cultured in cellulose pulp mill effluents containing 2,4,6-trichlorophenol

Rational design of heme enzymes for biodegradation of pollutants toward a green future

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