کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1937995 | 1050729 | 2007 | 5 صفحه PDF | دانلود رایگان |
Coccolith, a calcified scale with species-specific fine structure produced by marine unicellular coccolithophorid algae, consists of calcium carbonate (CaCO3) crystals and a small amount of organic matrices. A novel polysaccharide named coccolith matrix acidic polysaccharide (CMAP) was isolated from the coccolith of a coccolithophorid alga, Pleurochrysis haptonemofera. The structure of CMAP was determined by chemical analysis and NMR spectroscopy including COSY, TOCSY, HMQC, and HMBC to be a polysaccharide composed of the following unit: →4) l-iduronic acid (α1→2) meso-tartaric acid (3→1) glyoxylic acid (1→. It has four carboxyl groups per a disaccharide unit as observed in another polysaccharide PS-2 characterized previously in Pleurochrysis carterae. CMAP showed a strong inhibitory activity on CaCO3 precipitation. These results suggest that CMAP serves as a regulator in the calcification of the coccolith.
Journal: Biochemical and Biophysical Research Communications - Volume 357, Issue 4, 15 June 2007, Pages 1172–1176