Chemotaxis of a Ralstonia sp. SJ98 toward Different Nitroaromatic Compounds and Their Degradation

Samanta, Sudip; Bhushan, Bharat; Chauhan, Ashvini; Jain, Rakesh

doi:10.1006/bbrc.2000.2204

Cited by 97 publications

(86 citation statements)

References 27 publications

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“…strain SJ98 (Fig. 9), 2-nitrobenzoate is apparently metabolized by a reductive route, as ammonia was released and 2-aminobenzoate (anthranilate) was detected as an intermediate by gas chromatography-mass spectrometry (166). However, growth on anthranilate was not tested, and the genes and enzymes for 2-nitrobenzoate catabolism in strain SJ98 have yet to be identified.…”

Section: Pathways For Nitrobenzoate and Nitrobenzaldehyde Catabolismmentioning

confidence: 99%

Nitroaromatic Compounds, from Synthesis to Biodegradation

Parales

2010

Microbiol Mol Biol Rev

741

470

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SUMMARY Nitroaromatic compounds are relatively rare in nature and have been introduced into the environment mainly by human activities. This important class of industrial chemicals is widely used in the synthesis of many diverse products, including dyes, polymers, pesticides, and explosives. Unfortunately, their extensive use has led to environmental contamination of soil and groundwater. The nitro group, which provides chemical and functional diversity in these molecules, also contributes to the recalcitrance of these compounds to biodegradation. The electron-withdrawing nature of the nitro group, in concert with the stability of the benzene ring, makes nitroaromatic compounds resistant to oxidative degradation. Recalcitrance is further compounded by their acute toxicity, mutagenicity, and easy reduction into carcinogenic aromatic amines. Nitroaromatic compounds are hazardous to human health and are registered on the U.S. Environmental Protection Agency's list of priority pollutants for environmental remediation. Although the majority of these compounds are synthetic in nature, microorganisms in contaminated environments have rapidly adapted to their presence by evolving new biodegradation pathways that take advantage of them as sources of carbon, nitrogen, and energy. This review provides an overview of the synthesis of both man-made and biogenic nitroaromatic compounds, the bacteria that have been identified to grow on and completely mineralize nitroaromatic compounds, and the pathways that are present in these strains. The possible evolutionary origins of the newly evolved pathways are also discussed.

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Section: Pathways For Nitrobenzoate and Nitrobenzaldehyde Catabolismmentioning

confidence: 99%

Nitroaromatic Compounds, from Synthesis to Biodegradation

Parales

2010

Microbiol Mol Biol Rev

741

470

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“…However, this aspect has received little attention, even though some microorganisms with the chemotactic ability toward different xenobiotic compounds have been isolated and characterized (8,19,23,41,53). In many cases, the chemoattractant is a compound that serves as carbon and energy source, whereas a chemorepellent is toxic for the bacteria.…”

Section: Institute Of Microbial Technology Chandigarh-160036 Indiamentioning

confidence: 99%

Bacterial Chemotaxis toward Environmental Pollutants: Role in Bioremediation

Pandey

Jain

2002

Appl Environ Microbiol

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270

166

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“…Earlier strain SJ98 was tentatively identifi ed as Ralstonia sp. on the basis of the morphological and biochemical characterization [17], however, 16S rRNA gene sequence (1449 bp) ascertained its identity as a Burkholderia sp. This was further confi rmed by FAMEs analysis and genomic mol% G+C content (data not shown).…”

Section: Sampling Sites and Characterization Of Bacterial Isolatesmentioning

confidence: 99%

Diversity of ‘benzenetriol dioxygenase’ involved in p-nitrophenol degradation in soil bacteria

Paul¹,

Rastogi²,

Krauß³

et al. 2008

Indian J Microbiol

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Ring hydroxylating dioxygenases (RHDOs) are one of the most important classes of enzymes featuring in the microbial metabolism of several xenobiotic aromatic compounds. One such RHDO is benzenetriol dioxygenase (BtD) which constitutes the metabolic machinery of microbial degradation of several mono-phenolic and biphenolic compounds including nitrophenols. Assessment of the natural diversity of benzenetriol dioxygenase (btd) gene sequence is of great signifi cance from basic as well as applied study point of view. In the present study we have evaluated the gene sequence variations amongst the partial btd genes that were retrieved from microorganisms enriched for PNP degradation from pesticide contaminated agriculture soils. The gene sequence analysis was also supplemented with an in silico restriction digestion analysis. Furthermore, a phylogenetic analysis based on the deduced amino acid sequence(s) was performed wherein the evolutionary relatedness of BtD enzyme with similar aromatic dioxygenases was determined. The results obtained in this study indicated that this enzyme has probably undergone evolutionary divergence which largely corroborated with the taxonomic ranks of the host microorganisms.

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Chemotaxis of a Ralstonia sp. SJ98 toward Different Nitroaromatic Compounds and Their Degradation

Cited by 97 publications

References 27 publications

Nitroaromatic Compounds, from Synthesis to Biodegradation

Nitroaromatic Compounds, from Synthesis to Biodegradation

Bacterial Chemotaxis toward Environmental Pollutants: Role in Bioremediation

Diversity of ‘benzenetriol dioxygenase’ involved in p-nitrophenol degradation in soil bacteria

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