Fucose-containing exopolysaccharide produced by the newly isolated Enterobacter strain A47 DSM 23139

Freitas, Filomena; Alves, Vítor D.; Torres, Cristiana A.V.; Cruz, M.E.M.; Sousa, Isabel; Melo, Maria João; Ramos, A.M.; Reis, Maria A.M.

doi:10.1016/j.carbpol.2010.07.034

Cited by 130 publications

(101 citation statements)

References 24 publications

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“…Interest in the exploitation of microorganisms for production of valuable polysaccharides has greatly increased in recent years, since these biopolymers produced by a variety of microorganisms are chemically well defined and have attracted worldwide attention due to their novel and unique physical properties as bioadhesives, bioflocculants, biosorbents, gelling agents, probiotics, stabilizers, and thickeners, making them suitable for numerous commercial applications in the bionanotechnology, food, pharmaceutical, cosmetics, petroleum, civil construction, and environmental sectors. They have the advantages of being ecofriendly, non-toxic, and biodegradable (Freitas et al, 2011;Donot et al, 2012).…”

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confidence: 99%

Characterization of Exopolysaccharides Produced by Rhizobia Species

Castellane

Otoboni

Lemos

2015

Rev. Bras. Ciênc. Solo

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increasing attention has been given, over the past decades, to the production of exopolysaccharides (eps) from rhizobia, due to their various biotechnological applications. overall characterization of biopolymers involves evaluation of their chemical, physical, and biological properties; this evaluation is a key factor in understanding their behavior in different environments, which enables researchers to foresee their potential applications. our focus was to study the eps produced by Mesorhizobium huakuii lMG14107, M. loti lMG6125, M. plurifarium lMG11892, Rhizobium giardini bv. giardini h152 t , R. mongolense lMG19141, and Sinorhizobium (= Ensifer) kostiense lMG19227 in a rdM medium with glycerol as a carbon source. these biopolymers were isolated and characterized by reversed-phase high-performance liquid chromatography (rp-hplC), fourier transform infrared (ftir), and nuclear magnetic resonance (nMr) spectroscopies. Maximum exopolysaccharide production was 3.10, 2.72, and 2.50 g l -1 for the strains LMG6125, LMG19227, and LMG19141, respectively. The purified EPS revealed prominent functional reactive groups, such as hydroxyl and carboxylic, which correspond to a typical heteropolysaccharide. the eps are composed primarily of galactose and glucose. Minor components found were rhamnose, glucuronic acid, and galacturonic acid. indeed, from the results of techniques applied in this study, it can be noted that the eps are species-specific heteropolysaccharide polymers composed of common sugars that are substituted by non-carbohydrate moieties. in addition, analysis of these results indicates that rhizobial EPS can be classified into five groups based on ester type, as determined

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confidence: 99%

Characterization of Exopolysaccharides Produced by Rhizobia Species

Castellane

Otoboni

Lemos

2015

Rev. Bras. Ciênc. Solo

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“…Modifications can be induced by chemical reactions with other biomacromolecules, to alter the nature of side-chains or through cross-linking reactions (Freitas et al, 2011a). These new variants are expected to be high-performance products as they are likely to possess desirable material characteristics such as rheological properties for novel applications in various industries and as tissue engineering scaffolds.…”

Section: Strategies For Production Of Bacterial Exopolysaccharides Wimentioning

confidence: 99%

Rheological Behavior and Pharmaceutical Applications of Bacterial Exopolysaccharides

2017

J App Pharm Sci

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Over the last few decades, numerous bacterial exopolysaccharides have been extensively studied for their composition, structure, biosynthesis and functional properties, owing to their unique properties over traditional plant-derived gums and synthetic polysaccharides. They have been employed in food processing industries as rheology modifiers, gelling agents, in oil drilling and cement industries. But their full-fledged commercialization is yet to be achieved and their scope and possibilities in pharmaceutical field and optimized drug delivery are yet to be explored. The present review outlines, critically evaluates and summarizes the research outcomes on structure, solubility, solution behavior, rheological characterization, gelation mechanism and potential industrial and pharmaceutical applications of curdlan, polysaccharide 13140, Fucopol, levan, sphingans, succinoglycan and several other bacterial exopolysaccharides in their native form and also their derivatives. It also aims to identify and propose potential drug delivery systems where gelling and non gel-forming exopolysaccharides can be utilized successfully for development of stable, acceptable and effective dosage form.

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“…LW-13 that had a homologous index of 97% (RB51), Klebsiella pneumoniae strain DSM 30104 that had a homologous index of 98.65% (RB241), and Burkholderia anthina strain MYSP113 that had a homologous index of 98.83% (RB292). Extensively studied bacterial fucose-containing extracellular polysaccharides including colanic acid, fucogel and clavan were found in several genera of Enterobacteriaceae including Enterobacter, Salmonella, Escherichia and Klebsiella (Alves et al, 2010, Freitas et al, 2011, Ratto et al, 2006. Fucogel is a polysaccharide produced by Klebsiella pneumonia I-1507.…”

Section: Isolation and Identification Of Bacteriamentioning

confidence: 99%

The potential of exopolysaccharide-producing bacteria from rhizosphere of rubber plants for improving soil aggregate

Harahap

Santosa

Gofar

2018

J.Degrade.Min.Land Manage.

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Abstract:This study aimed to examine the effect of bacteria found in the rhizosphere of rubber plants in producing exopolysaccharides to improve aggregate stability of sandy soils. Samples of soil have been taken in rhizosphere of rubber plants in West Kalimantan. Serial soil samples were diluted and cultured on ATCC no.14 medium to select potential bacteria to produce exopolysaccharides. Forty-five isolates of exopolysaccharide-producing bacteria isolated from the rhizosphere of rubber plants was inoculated on ATCC no.14 medium. Based on the observations of morphological colony of these isolates, most of them had similarities in colour and shape so that only ten different isolates were obtained based on the morphological colony. Ten isolates were re-grown on MacConcey medium. Three isolates formed thick or slimy mucus when cultured on MacConcey medium. Three isolates grown on the medium of ATCC 14 resulted in dry weight of exopolysaccharide (mg/mL) varying from 0.28 to 7.59 mg/mL with sucrose and glucose as carbon sources. The results of the molecular identification of the three isolates of Klebsiella sp. LW-13, Klebsiella pneumoniae strain DSM 30104 and Burkholderia anthina strain MYSP113 showed that Klebsiella sp. LW-13 and Burkholderia anthina strain MYSP113 with 2% organic matter increased soil aggregate stability from highly unstable (30.67%) to unstable (45.01-48.20%). This aligned with the results by scanning electron microscopy (SEM) on treated soil and without bacteria treatments. Keywords: exopolysaccharides, sandy soil, rubber, bacteria, soil aggregateTo cite this article: Harahap, N., Santosa, D.A. and Gofar, N. 2018. The potential of exopolysaccharide-producing bacteria from rhizosphere of rubber plants for improving soil aggregate.

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Fucose-containing exopolysaccharide produced by the newly isolated Enterobacter strain A47 DSM 23139

Abstract: Enterobacter strain A47 (DSM 23139) was found to produce a fucose-containing exopolysaccharide (EPS). The EPS is composed of fucose, galactose, glucose, pyruvate, succinate and acetate in the molar ratios 1.

Cited by 130 publications

References 24 publications

Characterization of Exopolysaccharides Produced by Rhizobia Species

Characterization of Exopolysaccharides Produced by Rhizobia Species

Rheological Behavior and Pharmaceutical Applications of Bacterial Exopolysaccharides

The potential of exopolysaccharide-producing bacteria from rhizosphere of rubber plants for improving soil aggregate

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