Structural studies and physiological activity of lemnan, a pectin from Lemna minor L.

被引：0
|
作者：
Ovodova R.G. [1 ]
Golovchenko V.V. [1 ]
Shashkov A.S. [2 ]
Popov S.V. [1 ]
Ovodov Yu.S. [1 ]
机构：
[1] Institute of Physiology, Komi Science Center, Russian Academy of Sciences, Syktyvkar, 167982
[2] Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 117913
来源：
Russian Journal of Bioorganic Chemistry | 2000年 / 26卷 / 10期
关键词：
Apiogalacturonans; Immunomodulators; Lemna minor L; Lemnan; NMR spectroscopy of pectins; Pectins; Plant polysaccharides;
D O I：
10.1007/BF02821835
中图分类号：
学科分类号：
摘要：
A pectic polysaccharide, lemnan, was isolated from freshly collected duckweed Lemna minor L. Its sugar chain was shown to be mainly composed of the residues of D-galacturonic acid (64%), galactose, arabinose, xylose, and D-apiose, a branched chain sugar. The high content of D-apiose (25%) indicated that lemnan is an apiogalacturonan type pectin similar to zosteran, a pectic polysaccharide from a sea phanerogam of the Zosteraceae family. The results of partial acidic hydrolysis, pectinase digestion, and NMR studies of lemnan demonstrated that its macromolecule contains regions of the linear α-1,4-D-galacturonan and branched apiogalacturonan. The side chains of apiogalacturonan were found to be formed of single and 1,5-linked residues of D-apiofuranose attached to 2- and 3-positions of the D-galacturonic acid residues of the apiogalacturonan backbone. Lemnan was shown to exhibit an immunomodulatory effect activating the system of phagocytosis. © 2000 MAIK "Nauka/Interperiodica".
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页码：669 / 676
页数：7
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