COMPOSITION OF A METHYLATED, ACIDIC POLYSACCHARIDE ASSOCIATED WITH COCCOLITHS OF EMILIANIA-HUXLEYI (LOHMANN) KAMPTNER

被引:40
作者
FICHTINGERSCHEPMAN, AMJ [1 ]
KAMERLING, JP [1 ]
VLIEGENTHART, JFG [1 ]
DEJONG, EW [1 ]
BOSCH, L [1 ]
WESTBROEK, P [1 ]
机构
[1] STATE UNIV LEIDEN,DEPT BIOCHEM,LEIDEN,NETHERLANDS
关键词
D O I
10.1016/S0008-6215(00)85763-8
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The water-soluble, acidic polysaccharide isolated from the coccoliths of the alga Emiliania huxleyi (Lohmann) Kamptner contains residues of the following sugars: l-galactose, d-glucose, d-mannose, l-mannose, l-rhamnose, l-arabinose, d-ribose, d-xylose, 6-O-methyl-d-mannose, 6-O-methyl-l-mannose, 2,3-di-O-methyl-l-rhamnose, 3-O-methyl-d-xylose, and d-galacturonic acid. l-Mannose, 6-O-methyl-d-mannose, 6-O-methyl-l-mannose, and 2,3-di-O-methyl-l-rhamnose are novel constituents of a polysaccharide. In addition, the presence of sulphate groups was found. Galacturonic acid and sulphate in the polysaccharide bind Ca2+ ions apparently in a ratio of one mol of Ca2+ per mol of acidic residue. This feature is relevant for the proposed matrix function of the polysaccharide in the formation of the calcified cell-wall plates (coccoliths) of the alga. © 1979.
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页码:181 / 189
页数:9
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