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Abstract:

The water-soluble polysaccharides from Georgiella confluens, collected in Antarctica, were fractionated with cetrimide. The complexed material was subjected to fractional solubilization in solutions of increasing sodium chloride concentration. The initially extracted polysaccharide and the major fraction isolated, soluble in 0.5 M NaCl, were studied. These are sulfated xylogalactans naturally rich in methylated sugar residues, comprising of 3,6-anhydro-2-O-methyl-L-galactose, 2-O-methyl-L-galactose and 6-O-methyl-D-galactose. Structural analysis was carried out by methylation, ethylation, desulfation-ethylation, desulfation-methylation, Smith degradation, 13C NMR spectroscopy and determination of the absolute configuration of monosaccharides by gas chromatography of diastereomeric derivatives produced by reductive amination. The results indicated the presence of an agaran backbone with an unusual substitution pattern: sulfation mainly at the 3-position of the α-L-galactose units and the presence of xylose side chains at the 4-position of the β-D-galactose residues. © 2002 Elsevier Science Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Sulfated polysaccharides from the red seaweed Georgiella confluens
Autor:Kolender, A.A.; Matulewicz, M.C.
Filiación:Departamento De Química Orgánica, CIHIDECAR-CONICET, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Agarans; Galactans, sulfated; Polysaccharides, red algal; Polysaccharides, sulfated; Structural analysis; Gas chromatography; Nuclear magnetic resonance spectroscopy; Sodium chloride; Solubility; Solutions; Structural analysis; Xylose; Sulfated polysaccharides; Polysaccharides; 2 o methyl levo galactose; 3,6 anhydro 2 o methyl levo galactose; 6 o methyl dextro galactose; carbohydrate derivative; carbon 13; cetrimide; galactose; monosaccharide; polysaccharide sulfate; sodium chloride; sulfur derivative; unclassified drug; water; xylose; amination; Antarctica; article; carbohydrate analysis; chemical reaction; concentration response; conformation; controlled study; degradation; diastereoisomer; ethylation; fractionation; gas chromatography; methylation; nonhuman; nuclear magnetic resonance spectroscopy; priority journal; seaweed; solubility; structure analysis; sulfation and desulfurization; Algae, Red; Carbohydrate Conformation; Chromatography, Gas; Chromatography, Ion Exchange; Galactans; Galactose; Magnetic Resonance Spectroscopy; Polysaccharides; Sulfates; Xylose; algae; Confluens
Año:2002
Volumen:337
Número:1
Página de inicio:57
Página de fin:68
DOI: http://dx.doi.org/10.1016/S0008-6215(01)00283-X
Título revista:Carbohydrate Research
Título revista abreviado:Carbohydr. Res.
ISSN:00086215
CODEN:CRBRA
CAS:Galactans; Galactose, 26566-61-0; Polysaccharides; Sulfates; Xylose
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v337_n1_p57_Kolender

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Citas:

---------- APA ----------
Kolender, A.A. & Matulewicz, M.C. (2002) . Sulfated polysaccharides from the red seaweed Georgiella confluens. Carbohydrate Research, 337(1), 57-68.
http://dx.doi.org/10.1016/S0008-6215(01)00283-X
---------- CHICAGO ----------
Kolender, A.A., Matulewicz, M.C. "Sulfated polysaccharides from the red seaweed Georgiella confluens" . Carbohydrate Research 337, no. 1 (2002) : 57-68.
http://dx.doi.org/10.1016/S0008-6215(01)00283-X
---------- MLA ----------
Kolender, A.A., Matulewicz, M.C. "Sulfated polysaccharides from the red seaweed Georgiella confluens" . Carbohydrate Research, vol. 337, no. 1, 2002, pp. 57-68.
http://dx.doi.org/10.1016/S0008-6215(01)00283-X
---------- VANCOUVER ----------
Kolender, A.A., Matulewicz, M.C. Sulfated polysaccharides from the red seaweed Georgiella confluens. Carbohydr. Res. 2002;337(1):57-68.
http://dx.doi.org/10.1016/S0008-6215(01)00283-X