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Istituto di scienza dell'alimentazione

Torna all'elenco Contributi in rivista anno 2006

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Structural analysis of the polysaccharides from Echinacea angustifolia radix

Anno di pubblicazione: 2006

Formato: Cartaceo

Autori: Rosaria Cozzolino ; Paola Malvagna ; Emanuela Spina ; Andrea Giori , Nicola Fuzzati ; Alessandro Anelli ; Domenico Garozzo ; Giuseppe Impallomeni

Affiliazioni autori: CNR Istituto di Chimica e Tecnologia dei Polimeri, Viale R. Margherita 6, 95125 Catania, Italy INDENA S.p.A. Via don Minzoni 6, 20090 Settala, Milano, Italy

Autori CNR:

  • ROSARIA COZZOLINO
  • DOMENICO GAROZZO
  • GIUSEPPE IMPALLOMENI
  • EMANUELA TERESA AGATA SPINA

Lingua: inglese

Abstract: In this paper we report the characterization by monosaccharide and linkage analyses and by NMR spectroscopy and size exclusion chromatography of the carbohydrate fraction extracted from Echinacea angustifolia radix. In addition, the products of endo-pectin lyase, endo-pectate lyase, endo-polygalacturonase, endo-galactanase, and endo-arabinase digestion were characterized by MALDI-TOF mass spectrometry. The data obtained during this study showed that the carbohydrate fraction extracted from E. angustifolia radix is constituted by two polysaccharides with molecular weight of about 128,000 and 4500 Da. The low molecular weight polysaccharide corresponds to inulin while the high molecular weight component is a high metoxy pectin in which the backbone structure of the smooth region is constituted by a-(1-4)-polygalacturonan partially methyl esterified (60%) and acetylated (9%) and with the hairy regions containing 2-O- and 2,4-O-rhamnopyranose, 5-O- and 3,5-O-arabinofuranose, 3,6-galactopyranose, and terminal rhamnopyranose, arabinofuranose, arabinopyranose, galactopyranose, and galacturonopyranose. Mass spectrometry data of a galactanase treated sample showed evidence of a novel structure in the pectin hairy region, namely a galactose-galacturonic acid alternating sequence. 

Pagine da: 263

Pagine a: 272

Rivista:

Carbohydrate polymers Applied Science Publishers.
Paese di pubblicazione: Regno Unito
Lingua: inglese
ISSN: 0144-8617

Numero volume: 65

Numero fascicolo: 3

DOI: 10.1016/j.carbpol.2006.01.012

Indicizzato da: ISI Web of Science (WOS) [000240154300005]

Parole chiave:

  • Echinacea; Immunostimolation; Structure; Pectin

Strutture CNR:

Moduli:

Allegati: Structural analysis of the polysaccharides from Echinacea angustifolia radix (application/pdf)

 
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