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Structure and properties of carrageenan-like polysaccharide from the red alga Tichocarpus crinitus (Gmel.) Rupr. (Rhodophyta, Tichocarpaceae)

Author:
Barabanova, A. O., Shashkov, A. S., Glazunov, V. P., Isakov, V. V., Nebylovskaya, T. B., Helbert, W., Solov'eva, T. F., Yermak, I. M.
Source:
Journal of applied phycology 2008 v.20 no.6 pp. 1013-1020
ISSN:
0921-8971
Subject:
Fourier transform infrared spectroscopy, Rhodophyta, anticoagulant activity, cell walls, galactans, nuclear magnetic resonance spectroscopy, polymers, temperature
Abstract:
Sulfated polysaccharides occurring in the red algae Tichocarpus crinitus cell wall were fractionated and purified. NMR and FT-IR spectroscopy analyses revealed that the non-gelling fraction contained a sulfated galactans having a new carrageenan-like structure. It is built with alternatively linked 1,3-linked β-D-galactopyranosyl-2,4-disulphates and 1,4-linked 3,6-anhydro-α-D-galactopyranosyl residues. Minor amounts of its biosynthetic precursor were detected in a water-extracted specimen. Brief analysis of rheological and biological properties of the non-gelling fraction was carried out. The carrageenan-like polysaccharide from T. crinitus displayed the properties of “random coil” polymer at high temperature, and possesses high anticoagulant activity at low concentration.
Agid:
2173995