Exopolysaccharides produced by Gordonia alkanivorans enhance bacterial degradation activity for diesel

Ta-Chen, Lin; Chang, Jo Shu; Young, C. C.

doi:10.1007/s10529-008-9667-8

Cited by 34 publications

(9 citation statements)

References 22 publications

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“…Strains of Gordonia are known to produce surface-active compounds (SACs) (2,4,33,34,54,86). SACs play an important role in biodegradation of water-insoluble and hydrophobic compounds such as n-alkanes (8).…”

Section: Resultsmentioning

confidence: 99%

Involvement of Two Latex-Clearing Proteins during Rubber Degradation and Insights into the Subsequent Degradation Pathway Revealed by the Genome Sequence of Gordonia polyisoprenivorans Strain VH2

Hiessl

Schuldes

Thürmer

et al. 2012

Appl Environ Microbiol

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ABSTRACTThe increasing production of synthetic and natural poly(cis-1,4-isoprene) rubber leads to huge challenges in waste management. Only a few bacteria are known to degrade rubber, and little is known about the mechanism of microbial rubber degradation. The genome ofGordonia polyisoprenivoransstrain VH2, which is one of the most effective rubber-degrading bacteria, was sequenced and annotated to elucidate the degradation pathway and other features of this actinomycete. The genome consists of a circular chromosome of 5,669,805 bp and a circular plasmid of 174,494 bp with average GC contents of 67.0% and 65.7%, respectively. It contains 5,110 putative protein-coding sequences, including many candidate genes responsible for rubber degradation and other biotechnically relevant pathways. Furthermore, we detected two homologues of a latex-clearing protein, which is supposed to be a key enzyme in rubber degradation. The deletion of these two genes for the first time revealed clear evidence that latex-clearing protein is essential for the microbial utilization of rubber. Based on the genome sequence, we predict a pathway for the microbial degradation of rubber which is supported by previous and current data on transposon mutagenesis, deletion mutants, applied comparative genomics, and literature search.

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Section: Resultsmentioning

confidence: 99%

Involvement of Two Latex-Clearing Proteins during Rubber Degradation and Insights into the Subsequent Degradation Pathway Revealed by the Genome Sequence of Gordonia polyisoprenivorans Strain VH2

Hiessl

Schuldes

Thürmer

et al. 2012

Appl Environ Microbiol

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“…However, no previous studies have investigated the biological effects of fermented Rhodiola rosea and Lonicera japonica . To promote the processing of these two herbs, this study developed a process for fermenting Alcaligenes piechaudii CC-ESB2 [ 14 ], wherein the functionality of the herbs is preserved and enhanced. Therefore, natural products have the potential to be further developed into novel functional foods, cosmetic raw material, and effective phytomedicine.…”

Section: Introductionmentioning

confidence: 99%

Tyrosinase Inhibitory Effect and Antioxidative Activities of Fermented and Ethanol Extracts of Rhodiola rosea and Lonicera japonica

Chen

Liou

Chan

2013

The Scientific World Journal

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This is the first study to investigate the biological activities of fermented extracts of Rhodiola rosea L. (Crassulaceae) and Lonicera japonica Thunb. (Caprifoliaceae). Alcaligenes piechaudii CC-ESB2 fermented and ethanol extracts of Rhodiola rosea and Lonicera japonica were prepared and the antioxidative activities of different concentrations of samples were evaluated using in vitro antioxidative assays. Tyrosinase inhibition was determined by using the dopachrome method with L-DOPA as substrate. The results demonstrated that inhibitory effects (ED50 values) on mushroom tyrosinase of fermented Rhodiola rosea, fermented Lonicera japonica, ethanol extract of Lonicera japonica, and ethanol extract of Rhodiola rosea were 0.78, 4.07, 6.93, and >10 mg/ml, respectively. The DPPH scavenging effects of fermented Rhodiola rosea (ED50 = 0.073 mg/ml) and fermented Lonicera japonica (ED50 = 0.207 mg/ml) were stronger than effects of their respective ethanol extracts. Furthermore, the scavenging effect increases with the presence of high content of total phenol. However, the superoxide scavenging effects of fermented Rhodiola rosea was less than effects of fermented Lonicera japonica. The results indicated that fermentation of Rhodiola rosea and Lonicera japonica can be considered as an effective biochemical process for application in food, drug, and cosmetics.

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“…polysaccharides, proteins, and lipids are potential bioemulsifiers suitable for industrial and environmental applications. Bacteria such as Halomonas eurihalina, Enterobacter cloacear, and Gordonia alkanivorans produce EPS with emulsifying properties (Ta-Chen, Chang, & Young, 2008). Thus, biofilm (or associated EPS) are natural emulsifying agents and important tools for remediation of hydrocarbons (Ta-Chen, Chang, & Young, 2008).…”

Section: Role Of Biofilm-associated Eps In Bioremediationmentioning

confidence: 99%

Bacterial biofilms and quorum sensing: fidelity in bioremediation technology

Mangwani

Kumari

Das

2016

Biotechnology and Genetic Engineering Reviews

101

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Increased contamination of the environment with toxic pollutants has paved the way for efficient strategies which can be implemented for environmental restoration. The major problem with conventional methods used for cleaning of pollutants is inefficiency and high economic costs. Bioremediation is a growing technology having advanced potential of cleaning pollutants. Biofilm formed by various micro-organisms potentially provide a suitable microenvironment for efficient bioremediation processes. High cell density and stress resistance properties of the biofilm environment provide opportunities for efficient metabolism of number of hydrophobic and toxic compounds. Bacterial biofilm formation is often regulated by quorum sensing (QS) which is a population density-based cell-cell communication process via signaling molecules. Numerous signaling molecules such as acyl homoserine lactones, peptides, autoinducer-2, diffusion signaling factors, and α-hydroxyketones have been studied in bacteria. Genetic alteration of QS machinery can be useful to modulate vital characters valuable for environmental applications such as biofilm formation, biosurfactant production, exopolysaccharide synthesis, horizontal gene transfer, catabolic gene expression, motility, and chemotaxis. These qualities are imperative for bacteria during degradation or detoxification of any pollutant. QS signals can be used for the fabrication of engineered biofilms with enhanced degradation kinetics. This review discusses the connection between QS and biofilm formation by bacteria in relation to bioremediation technology.

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Exopolysaccharides produced by Gordonia alkanivorans enhance bacterial degradation activity for diesel

Cited by 34 publications

References 22 publications

Involvement of Two Latex-Clearing Proteins during Rubber Degradation and Insights into the Subsequent Degradation Pathway Revealed by the Genome Sequence of Gordonia polyisoprenivorans Strain VH2

Involvement of Two Latex-Clearing Proteins during Rubber Degradation and Insights into the Subsequent Degradation Pathway Revealed by the Genome Sequence of Gordonia polyisoprenivorans Strain VH2

Tyrosinase Inhibitory Effect and Antioxidative Activities of Fermented and Ethanol Extracts of Rhodiola rosea and Lonicera japonica

Bacterial biofilms and quorum sensing: fidelity in bioremediation technology

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