Structural features of the sulphated polysaccharide from a green seaweed, Cladophora socialis.
A sulphated heteropolysaccharide, [alpha]27D + 59.9 degrees, has been isolated from a green seaweed, Cladophora socialis, by extraction with dilute acid and purified by fractional precipitation. The polymer is composed of galactose (58.3%), arabinose (31.8%), xylose (10.6%) and sulphate (16.9%). The results of methylation analysis, periodate oxidation and partial acid hydrolysis studies indicate that the polymer is a branched one and is composed of 1,3-linked galactose and 1,4-linked arabinose units. Xylose is present at the non-reducing end position of the branches. Both arabinose and galactose carry branches. Desulphation and subsequent analysis of the polymer show that some of the arabinose units carry sulphate groups at C-3 and some of the galactose units carry the sulphate groups at C-4 and some at C-4 and C-6 as well.
Department of Pharmaceutical Sciences, Andhra University, Visakhapatnam, India.
K S
KS
Ramana
E V
EV
Rao
D002240:Carbohydrate Sequence; D002241:Carbohydrates / Q000032:analysis; D000460:Chlorophyta / Q000032:analysis*; D006868:Hydrolysis; D008745:Methylation; D008969:Molecular Sequence Data; D015394:Molecular Structure; D010084:Oxidation-Reduction; D010504:Periodic Acid; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D013431:Sulfates / Q000737:chemistry* / Q000302:isolation & purification
D002241:Carbohydrates; D011134:Polysaccharides; D013431:Sulfates; D010504:Periodic Acid; C009288:metaperiodate