Rhamnolipids know-how: Looking for strategies for its industrial dissemination

Lovaglio, Roberta Barros; Silva, V.L.; Ferreira, Henrique; Hausmann, Rudolf; Contiero, Jonas

doi:10.1016/j.biotechadv.2015.09.002

Cited by 55 publications

(21 citation statements)

References 112 publications

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“…Moreover, strain DN1 genome encodes many genes involving in biosurfactant rhamnolipid synthesis, including rhamnosyltransferase (RhlA), glycosyl transferases (RhlB), L-rhamnosyl transferase (RhlC), dTDP-D-glucose 4,6-dehydratase (RmlB), dTDP-4-dehydrorhamnose reductase (RmlD), glucose-1-phosphate thymidylyltransferase (RmlA), dTDP-4-dehydrorhamnose 3,5-epimerase (RmlC) and phosphomannomutase (AlgC). Additionally, there are many gene regulatory factors related to rhamnolipid production, such as RsaL, RpoN, RpoS, PhoB, DksA, MvfR, PtxR and AlgR (Reis et al, 2011;Dobler et al, 2015;Lovaglio et al, 2015). The genome information of strain DN1 provides insights into investigating the metabolic and regulatory mechanisms of hydrocarbon biodegradation.…”

Section: Data Descriptionmentioning

confidence: 99%

Complete genome sequence of a versatile hydrocarbon degrader, Pseudomonas aeruginosa DN1 isolated from petroleum-contaminated soil

Dong

He²,

Li³

et al. 2017

Gene Reports

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Section: Data Descriptionmentioning

confidence: 99%

Complete genome sequence of a versatile hydrocarbon degrader, Pseudomonas aeruginosa DN1 isolated from petroleum-contaminated soil

Dong

He²,

Li³

et al. 2017

Gene Reports

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“…Among biosurfactants, rhamnolipids have attracted a pronounced attention in the last years. Rhamnolipids are a class of glycolipid biosurfactants produced mainly by Pseudomonas aeruginosa strains, which consist of one or two rhamnose molecules linked to one or two b-hydroxy fatty acids (Henkel et al, 2012;Kiran et al, 2015;Lovaglio et al, 2015). Besides their ability to reduce the surface/interfacial tension and their emulsifying activity, rhamnolipids exhibit additional properties when compared with chemical surfactants, including antimicrobial and antitumor activities (Bharali et al, 2013;Christova et al, 2013), which expands the spectrum of their potential applications, increasing their value.…”

Section: Introductionmentioning

confidence: 99%

Valorization of agro-industrial wastes towards the production of rhamnolipids

Gudiña

Rodrigues

Freitas

et al. 2016

Bioresource Technology

138

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In this work, oil mill wastewater (OMW), a residue generated during olive oil extraction, was evaluated as an inducer of rhamnolipid production. Using a medium containing as sole ingredients corn steep liquor (10%, v/v), sugarcane molasses (10%, w/v) and OMW (25%, v/v), Pseudomonas aeruginosa #112 produced 4.5 and 5.1g of rhamnolipid per liter in flasks and reactor, respectively, with critical micelle concentrations as low as 13mg/l. Furthermore, in the medium supplemented with OMW, a higher proportion of more hydrophobic rhamnolipid congeners was observed comparing with the same medium without OMW. OMW is a hazardous waste which disposal represents a serious environmental problem; therefore, its valorization as a substrate for the production of added-value compounds such as rhamnolipids is of great interest. This is the first report of rhamnolipid production using a mixture of these three agro-industrial by-products, which can be useful for the sustainable production of rhamnolipids.

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“…Acinetobacter venetianus, Enterobacter cloacae, and Staphylococcus epidermidis have been reported for the production of biosurfactant in previous reports (Bach et al 2003;Hamed et al 2012;Ekprasert et al 2019). The microbial biosurfactants are very important compounds that can be used in various areas of application such as the pharmaceutical application, agriculture, food industries, enhanced oil recovery and environmental restoration (Liu et al 2013;Lovaglio et al 2015). The production of biosurfactants in large amounts for industrial applications depends on the optimization of the media composition and condition, primarily carbon, pH, temperature, and nitrogen sources.…”

Section: Discussionmentioning

confidence: 99%

Distribution and molecular characterization of biosurfactant-producing bacteria

2020

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Abstract. Alyousif NA, Luaibi YYYA, Hussein W. 2020. Distribution and molecular characterization of biosurfactant-producing bacteria. Biodiversitas 21: 4034-4040. Biosurfactants (BSs) are biological surface-active compounds produced by several microorganisms with many areas of application, as such become an important product in biotechnology and consequence to be used in industries. In recent years, many researchers pay attention to BSs producers' microorganisms. The present study was aimed to isolate, identify, and screening BS producing bacteria from six various sites in two different cities in Iraq. Four samples were collected from four sites in Basrah governorate and the rest two samples from Al-Garraf oilfield in Thi-Qar governorate. A total of 33 different bacterial isolates were obtained, 20 out of the 33 were found to be biosurfactants producing isolates that detected through the emulsification index (E24%), oil spreading test, and emulsification activity. The isolated bacterial strains were more identified by 16S rRNA gene sequencing. The results showed that the biosurfactants producing isolates belonged to genera Bacillus, Pseudomonas, Enterobacter, Staphylococcus, Acinetobacter, and Aerococcus. Bacillus jeotgali and Aerococcus viridans are reporting as biosurfactant producing bacteria for the first time and Bacillus jeotgali is isolated for first time from crude oil of oilfield reservoir in this study in world. Moreover, six bacterial isolates were identified as new strains and deposited at NCBI Genbank under accession numbers MT261834 (Bacillus subtilis strain IRQNWYA3), MT261835 (Bacillus licheniformis strain IRQNWYB4), MT261836 (Pseudomonas stutzeri strain IRQNWYF2), MT261837 (Pseudomonas zhaodongensis strain IRQNWYF3), MT261838 (Pseudomonas sp. IRQNWYF4) and MT261839 (Bacillus licheniformis strain IRQNWYF5). A2 isolate that was identified as Pseudomonas aeruginosa has shown the highest values of emulsification activity and emulsification index (1.678±0.050 absorbance at 540 nm and 56.6% respectively) that show efficient potential of biosurfactant production. Phylogenetic tree was also constructed in this study based on 16S rRNA gene sequences of biosurfactant-producing bacteria to evaluate their close relationship and evolution between them.

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Rhamnolipids know-how: Looking for strategies for its industrial dissemination

Cited by 55 publications

References 112 publications

Complete genome sequence of a versatile hydrocarbon degrader, Pseudomonas aeruginosa DN1 isolated from petroleum-contaminated soil

Complete genome sequence of a versatile hydrocarbon degrader, Pseudomonas aeruginosa DN1 isolated from petroleum-contaminated soil

Valorization of agro-industrial wastes towards the production of rhamnolipids

Distribution and molecular characterization of biosurfactant-producing bacteria

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