Sequence analysis of the sulfated rhamno-oligosaccharides derived from a sulfated rhamnan.
Carbohydr Polym
; 90(3): 1299-304, 2012 Oct 15.
Article
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| MEDLINE
| ID: mdl-22939344
ABSTRACT
Three sulfated rhamno-oligosaccharides, designated O1, O2 and O3, were obtained by mild acid hydrolysis of the sulfated rhamnan and purified by gel-permeation chromatography. On the basis of one- and two-dimensional nuclear magnetic resonance (1D, 2D NMR) spectroscopic analyses, the oligosaccharide O1 was characterized to be α-L-Rhap-(2SO4)-(1â3)-α-L-Rhap. The fragmentation pattern of the homogeneous disaccharide in the product ion spectra was recognized by negative-ion electrospray tandem mass spectrometry with collision-induced dissociation (ES-CID MS/MS). With the principles established, the sequences of the oligosaccharides O2 and O3 were deduced to be α-L-Rhap-(2SO4)-(1â3)-α-L-Rhap-(1â3)-α-L-Rhap, and α-L-Rhap-(2SO4)-(1â3)-α-L-Rhap-(1â3)-α-L-Rhap-(1â3)-α-L-Rhap (2SO(4)), respectively. The investigation demonstrated that the sulfated rhamnan-derived oligosaccharides were novel sulfated oligosaccharides different from those of other polysaccharides-degraded from algae, and it could be possible to determine the sequence of the sulfated rhamno-oligosaccharides directly from the glycosidic cleavage fragmentation in the product ion spectra.
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MEDLINE
Asunto principal:
Oligosacáridos
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Ésteres del Ácido Sulfúrico
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Desoxiazúcares
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Chlorophyta
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Mananos
Idioma:
En
Revista:
Carbohydr Polym
Año:
2012
Tipo del documento:
Article