title: Structural characteristics of oxalate-soluble polysaccharides of Sosnowsky's hogweed (Heracleum sosnowskyi Manden).
abstract: Arabinogalactan proteins (AGP) and pectic polysaccharides were isolated from above-ground parts of Heracleum sosnowskyi. The structural study has shown that a linear region of the pectic macromolecules consists of 1,4-α-d-galactopyranosyluronan blocks partially methyl esterified and acetylated. The branched region consists of 3-O- and partially 2-O-acetylated rhamnogalacturonan I. Side chains of the RG-I backbone include the regions of arabinogalactan I and branched 1,5-α-l-arabinan. The carbohydrate part of AGP consists of arabinogalactan II with a 1,3-β-d-Galp main chain. The side chains of the branched area of AG-II are composed of 1,6-β-d-Galp, 1,5-, 1,3,5-α-l-Araf, 4-O-Me-β-d-GlcA and 1,4-β-d-GlcpA, and non-reducing ends residues of β-d-Galp, α-l-Araf, α-l-Rhap and α-l-Fucp. The branch points of the main and side chains are formed by 3,6-di-O-substituted β-d-Galp. It was found that at least a portion of pectin is probably covalently linked to AGP, wherein AGP is linked to RG-I, but not with galacturonan.
authors: Institute of Chemistry, Komi Science Centre, Urals Branch of the Russian Academy of Sciences, Pervomaiskaya St. 48, Syktyvkar 167982, Russia. Electronic address: makarowa.elena-ma@yandex.ru.
authors: Elena N
authors: EN
authors: Makarova
authors: Institute of Chemistry, Komi Science Centre, Urals Branch of the Russian Academy of Sciences, Pervomaiskaya St. 48, Syktyvkar 167982, Russia.
authors: Evgeny G
authors: EG
authors: Shakhmatov
authors: Institute of Chemistry, Komi Science Centre, Urals Branch of the Russian Academy of Sciences, Pervomaiskaya St. 48, Syktyvkar 167982, Russia.
authors: Vladimir A
authors: VA
authors: Belyy
mesh_terms: D005685:Galactans / Q000032:analysis; D030002:Heracleum / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009088:Mucoproteins / Q000032:analysis*; D010070:Oxalates / Q000737:chemistry; D010368:Pectins / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis*; D011134:Polysaccharides / Q000032:analysis*; D012995:Solubility
chemical_list: D005685:Galactans; D009088:Mucoproteins; D010070:Oxalates; D010940:Plant Proteins; D011134:Polysaccharides; C006619:arabinogalactan proteins; C042491:rhamnogalacturonan I; D010368:Pectins; C005653:arabinogalactan
keywords: Arabinogalactan II; Arabinogalactan proteins; Heracleum sosnowskyi; NMR; Pectin; Structure