Structure of the 'corallinans'--sulfated xylogalactans from Corallina officinalis.
The structure of the main polysaccharides extracted from the red seaweed Corallina officinalis was characterized by methylation, desulfation-methylation, and ethylation analysis. The backbone has an alternating-->4)-alpha-L-Gal-(1-->3)-beta-D-Gal-(1-->structure. The C6 position of 3-linked units is substituted mainly by beta-D-xylosyl side stubs but also by sulfate ester groups and minor amounts of 4-O-methylgalactosyl side stubs. Positions C2 and C3 of 4-linked units also carry sulfate or methoxyl as substituents, but never both together in the same unit. Minor fractions modulate this structure with other irregularities, such as higher branching or, possibly, unusual (1-->2) or (1-->6) linkages.
Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Airés, Argentina.
M R
MR
Cases
C A
CA
Stortz
A S
AS
Cerezo
D002240:Carbohydrate Sequence; D004980:Ethane; D005685:Galactans / Q000737:chemistry*; D008745:Methylation; D008969:Molecular Sequence Data; D000461:Rhodophyta / Q000737:chemistry*; D012624:Seaweed / Q000737:chemistry*; D013455:Sulfur
D005685:Galactans; D013455:Sulfur; D004980:Ethane