Bacterial Polymers Produced by Extremophiles: Biosynthesis, Characterization, and Applications of Exopolysaccharides

Nicolaus, Barbara; Anzelmo, Gianluca; Poli, Annarita

doi:10.1002/9781118394144.ch13

Cited by 3 publications

(2 citation statements)

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“…Characterization of EPS synthesized by extremophiles may open opportunities for unique applications. Microorganisms produce EPS in order to survive in extreme environmental condition; the EPS act as a protecting sheath and helps colonizing the bacteria leading to their improved continued existence [17].…”

Section: Introductionmentioning

confidence: 99%

Structural and Functional Properties of Exopolysaccharide Excreted by a Novel Bacillus anthracis (Strain PFAB2) of Hot Spring Origin

et al. 2017

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Exopolysaccharide produced by a unique avirulent strain PFAB2 of hot spring origin has been characterized and its functional properties are investigated which is a first report. Maximum yield of EPS is 7.66 g/l with 2% glucose and 1% peptone as optimum carbon and nitrogen source respectively. The EPS is found to be a homopolymer consisting of only glucose as principle monosaccharide component. ThroughH NMR study, different dextran-like proton peaks are observed. Molecular weight of the EPS resembles low molecular weight bacterial origin polysaccharides. Melting transition of the EPS has started after 276 °C which indicates good thermal stability. The EPS also shows potent antioxidant activity in terms of DPPH and ABTS mediated free radical scavenging property compared to standard ascorbic acid. Emulsifying property of the EPS is also observed and has shown good emulsification of vegetable oils. The polysaccharide forms a thermo resistant gel during the heating phase, with G' higher than G″ indicating excellent shear-thinning behaviour and viscoelastic nature of the EPS.

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Section: Introductionmentioning

confidence: 99%

Structural and Functional Properties of Exopolysaccharide Excreted by a Novel Bacillus anthracis (Strain PFAB2) of Hot Spring Origin

et al. 2017

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“…Extremophiles are also source of useful biopolymers (Barbara et al 2012) like bioplastics (Lu et al 2009) and exopolysaccharides (Nicolaus et al 2010). Gas vesicle and liposomes of some halophilic bacteria can be used for vaccine development (Stuart et al 2001(Stuart et al , 2004.…”

Section: Extremophilic Microorganismsmentioning

confidence: 99%