A nearly idealized 6'-O-methylated iota-carrageenan from the Australian red alga Claviclonium ovatum (Acrotylaceae, Gigartinales)

Anthony Chiovitti; Antony Bacic; David J Craik; Gerald T Kraft; Ming-Long Liao

doi:10.1016/j.carres.2004.03.019

A nearly idealized 6'-O-methylated iota-carrageenan from the Australian red alga Claviclonium ovatum (Acrotylaceae, Gigartinales)

Carbohydr Res. 2004 Jun 1;339(8):1459-66. doi: 10.1016/j.carres.2004.03.019.

Authors

Anthony Chiovitti¹, Antony Bacic, David J Craik, Gerald T Kraft, Ming-Long Liao

Affiliation

¹ School of Botany, University of Melbourne, Victoria 3010, Australia.

PMID: 15178388
DOI: 10.1016/j.carres.2004.03.019

Abstract

The polysaccharides extracted from Claviclonium ovatum were studied by a combination of compositional assays, reductive partial hydrolysis, linkage analysis, Fourier Transform infrared (FTIR) spectroscopy, and 13C, 1H, and 13C/1H heteronuclear multiple quantum correlation (HMQC) two-dimensional nuclear magnetic resonance (NMR) spectroscopy. The chemical and spectroscopic data showed that the alkali-modified C. ovatum polysaccharides are composed of a nearly idealized repeating unit of 6'-O-methylcarrabiose 2,4'-disulfate (the repeating unit of 6'-O-methylated iota-carrageenan), although some minor components were also present. The C. ovatum galactans are the most highly methylated carrageenans reported.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Australia
Carbohydrate Conformation
Carrageenan / chemistry*
Carrageenan / isolation & purification
Hydrolysis
Magnetic Resonance Spectroscopy
Rhodophyta / chemistry*
Spectroscopy, Fourier Transform Infrared

Substances

6'-O-methylated iota-carrageenan
methylcarrabioside 2,4'-disulfate
Carrageenan