[Structure and physiological activity of lemnan, Lemna minor L. pectin]. / Strukturnoe issledovanie i fiziologicheskaia aktivnost' lemnana, pektina iz Lemna minor L..
Bioorg Khim
; 26(10): 743-51, 2000 Oct.
Article
em Ru
| MEDLINE
| ID: mdl-11221255
ABSTRACT
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 alpha-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 by activating the system of phagocytosis.
Buscar no Google
Base de dados:
MEDLINE
Assunto principal:
Plantas
/
Adjuvantes Imunológicos
/
Pectinas
Limite:
Animals
Idioma:
Ru
Ano de publicação:
2000
Tipo de documento:
Article