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Structural characterization and antioxidant activity of a glucan from Meripilus giganteus
P MAITY, A K NANDI, D K MANNA, M PATTANAYAK, I K SEN, S K BHANJA, S SAMANTA, B C PANDA, S PALOI, Show More
Published in Elsevier Ltd
2017
PMID: 27987828
Volume: 157
   
Pages: 1237 - 1245
Abstract
A new water soluble glucan (MGPS), with a molecular weight ∼1.48 × 105 Da, was isolated from the fruit bodies of Meripilus giganteus by hot water extraction followed by purification through dialysis tubing cellulose membrane and sepharose 6B column chromatography. Its structural characteristics were investigated by acid hydrolysis, methylation analysis, Smith degradation and 1D/2D NMR experiments. The monosaccharide composition analysis showed that MGPS contain only glucose. The backbone of MGPS was composed of two (1 → 3)-β-D-glucopyranosyl, two (1 → 6)-β-D-glucopyranosyl, two (1 → 6)-α-D-glucopyranosyl, and one (1 → 4)-α-D-glucopyranosyl residues, out of which one (1 → 3)-β-D-glucopyranosyl residue was branched at O-6 position with terminal α-D-glucopyranosyl residue and one (1 → 4)-α-D-glucopyranosyl residue branched at O-6 position with terminal β-D-glucopyranosyl residue. In vitro antioxidant studies showed that the MGPS exhibited hydroxide radical scavenging activity (IC50 = 390 μg/mL), superoxide radical scavenging activity (IC50 = 70 μg/mL), and ferrous ion chelating activity (IC50 = 290 μg/mL). © 2016 Elsevier Ltd
About the journal
JournalData powered by TypesetCarbohydrate Polymers
PublisherData powered by TypesetElsevier Ltd
ISSN0144-8617
Open AccessNo