Partially methylated galactans containing different proportions of 3-O-methyl-galactose from Pleurotus citrinopileatus

Brito, Dayane R.; Carbonero, Elaine R.; Viana, Sthefany R. F. [UNESP]; Silva, Estefania V.; Ruthes, Andrea Caroline; Liao, Luciano M.; Iacomini, Marcello

Partially methylated galactans containing different proportions of 3-O-methyl-galactose from Pleurotus citrinopileatus

Arquivos

WOS000427876500004.pdf (1.29 MB)

Data

2018-03-22

Autores

Brito, Dayane R.

Carbonero, Elaine R.

Viana, Sthefany R. F.

Silva, Estefania V.

Ruthes, Andrea Caroline

Liao, Luciano M.

Iacomini, Marcello

Editor

Elsevier B.V.

Tipo

Resenha

Direito de acesso

Acesso aberto

Resumo

Pleurotus citrinopileatus, popularly known as golden oyster mushroom have medicinal properties, which are attributed mainly to the presence of bioactive polysaccharides. In this work, two partially 3-O-methylated galactans were isolated from the fruiting bodies of this fungus, via successive aqueous extraction, followed by fractionation by freeze-thawing, and precipitation of soluble material with Fehling solution. The structural assignments were carried out using mono-and bidimensional NMR spectroscopy, monosaccharide composition, and methylation analyses. The polysaccharides were characterized as linear, partially 3-O-methylated (1 -> 6)-linked alpha-galactopyranans, containing only Gal and 3-O-Me-Gal, in 2:1 and 1:1 molar ratios, with molar masses of 37.6 x 10(3) g/mol and 28.5 x 10(3) g/mol, respectively. Similar structures have been described for other Pleurotus spp., but showing a lower content of 3-O-Me-Gal. (c) 2018 Elsevier Ltd. All rights reserved.