A nearly idealized 6'-O-methylated iota-carrageenan from the Australian red alga Claviclonium ovatum (Acrotylaceae, Gigartinales).
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.
Chiovitti
Anthony
A
School of Botany, University of Melbourne, Victoria 3010, Australia.
Bacic
Antony
A
Craik
David J
DJ
Kraft
Gerald T
GT
Liao
Ming-Long
ML
D001315:Australia; D002236:Carbohydrate Conformation; D002351:Carrageenan / Q000737:chemistry* / Q000302:isolation & purification; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D000461:Rhodophyta / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
C494564:6'-O-methylated iota-carrageenan; C068277:methylcarrabioside 2,4'-disulfate; D002351:Carrageenan