title: Structure of tanacetan, a pectic polysaccharide from tansy Tanacetum vulgare L.
abstract: Tanacetan TVF was found to have a branched structure with a backbone of linear alpha-1,4-D-galacturonan. The ramified regions consist of linear alpha-1,2-L-rhamno-alpha-1,4-D-galacturonan as the core. The side chains appear to attach to the 4-position of the L-rhamnopyranose residues. They are present as single beta-galactopyranose residues or a branching beta-1,4-galactopyranan bearing 4,6-substituted beta-D-galactopyranose residues as branched points. In addition, the ramified regions contain side chains of a branched alpha-1,5-arabinofuranan possessing 2,5- and 3,5-substituted alpha-L-arabinofuranose residues as branching points. Some side chains of rhamnogalacturonan appear to be arabinogalactan which contains branched sugar chains of alpha-1,5-arabinofuranan attached to the linear chains of beta-1,4-galactopyranan by 1,3- and 1,6-linkages. The residues of alpha-L-arabinofuranose seem to occupy the terminal positions of the arabinogalactan side chains.
authors.affiliation: Institute of Physiology, Komi Science Center, Ural Branch of the Russian Academy of Sciences, Syktyvkar, 167982 Russia. polle@physiol.komisc.ru
authors.forename: A Ya
authors.initials: AY
authors.lastname: Polle
authors.forename: R G
authors.initials: RG
authors.lastname: Ovodova
authors.forename: A O
authors.initials: AO
authors.lastname: Chizhov
authors.forename: A S
authors.initials: AS
authors.lastname: Shashkov
authors.forename: Yu S
authors.initials: YS
authors.lastname: Ovodov
mesh_terms: D019659:Asteraceae / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D008401:Gas Chromatography-Mass Spectrometry; D006868:Hydrolysis; D008094:Lithium / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D010368:Pectins / Q000737:chemistry*; D010944:Plants / Q000378:metabolism; D011134:Polysaccharides / Q000737:chemistry*; D013997:Time Factors
chemical_list: D011134:Polysaccharides; D010368:Pectins; D008094:Lithium; C003181:polygalacturonic acid