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TitleNMR structural elucidation of the arabinan from Prunus dulcis immunobiological active pectic polysaccharides
Author(s)Dourado, Fernando
Cardoso, Susana M.
Silva, Artur M. S.
Gama, F. M.
Coimbra, Manuel A.
Prunus dulcis
Issue dateOct-2006
JournalCarbohydrate polymers
Citation"Carbohydrate polymers". ISSN 0144-8617. 66:1 (Oct. 2006) 27-33.
Abstract(s)The structure of the arabinan moiety of a purified arabinan-rich pectic polysaccharide from the cell walls of Prunus dulcis seeds was investigated by NMR spectroscopy. This polymer, which is able to induce a lymphocyte stimulatory effect, had an arabinan glycosidiclinkage composed of T-Araf: (1→5)-Araf: (1→3,5)-Araf: (1→2,3,5)-Araf in the relative proportions of approximately 3:2:1:1. Based on the ¹H, ¹³C, COSYPR, gHSQC and gHMBC spectra of analysed arabinan, a tentative structure is presented, showing that it is composed by a very branched and, possibly, repetitive structure of seven residues. The observed (1→5) direct linkage between (1→2,3,5)- Araf and (1→3,5)-Araf residues support the occurrence of these contiguous branched residues in the arabinan backbone.
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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