Cell-wall polysaccharides rhamnogalacturonan

Stevenson, T. T., Darvill, A. G., Albersheim, P. (1988). 3-Deoxy-D-/yxo-2-heptulosaric acid, a component of the plant cell-wall polysaccharide rhamnogalacturonan-II. Carbohydr. Res., 179, 269-288. 

R 535 S. Perez, M. A. Rodriguez-Carvajal and T. Doco, A Complex Plant Cell Wall Polysaccharide Rhamnogalacturonan II. A Structure in Quest of a Function , Biochimie, 2003,85,109... 

Figures 3 and 5 from Biochimie, vol 85, Perez S, Rodrigues-Carvajal MA, DocoT (2003) A complex plant cell wall polysaccharide rhamnogalacturonan 11. A structure in quest of a function. p 109-pl21...

T. Ishii, T. Matsunaga, P. Pellerin, M.A. O Neill, A. Darvill, P. Albersheim. The plant cell wall polysaccharide rhamnogalacturonan II self-assembles into a covalently cross-linked dimer. J Biol Chem, 1999, in press... 

A cell-wall polysaccharide fraction remaining after treatment with a "classical" pectinase is termed rhamnogalacturonan (RG) or modified hairy regions (MHR). It is characterized by a highly branched ihamnogalacturonan-polymer with some arabinan side chains. 

Pectin is a complex class of plant cell wall polysaccharides, composed of galacturonans and rhamnogalacturonans. Pectin has a backbone of P-(l-4)-D-galacturonic acid with a-(l-2)-L-rhamnose units interspersed (Figure 2.12). The galacturonic acid units are partially acetylated and methylated, and the L-rhamnose units contain side chains containing arabinose and/or galactose [82]. 

Rhamnogalacturonan 11 (RG-11) is a structurally complex, pectic polysaccharide that is present in the primary cell-walls of higher plants. It is composed of 60 glycosyl residues, and is a very complex molecule indeed. For example, on acid hydrolysis, at least ten different monosaccharides are formed, including the novel aceric acid (30), which is the only branched-... 

There are three pectic polysaccharides in all primary cell walls that have been studied these are rhamnogalacturonan n, rhamnogalacturonan I, and homogalacturonan. 

Other polysaccharides of primary cell walls.-A complex mixture of enzymes including endopolygalacturonase, pectin methylesterase, and/or pectin lyase solubilizes a mixture of polysaccharides from the primary cell walls of fruits [57-64]. Food scientists have referred for some 15 years to this mixture of polysaccharides as the hairy region to describe the highly branched character of the polysaccharides in the fraction and to emphasize the contrast to unbranched homogalacturonan. The recent discovery of rhamnogalacturonan hydrolase [65,66], which selectively cleaves the backbone of RG-I, led to the realization that the hairy... 

An, J., O Neill, M.A., Albersheim, P., and Darvill, A.G. (1995) Isolation and structural characterization of B-D-glucosyluronic acid-containing oligosaccarides from the cell-wall pectic polysaccharide, rhamnogalacturonan I. CarbohydrMes. 252 235-243. 

The acidic polysaccharides. In Dicotyledons, the major acidic polysaccharides are the pectins (partially methyl-esterified homogalacturo-nans and rhamnogalacturonans) and smaller amounts of arabinoglu-curonoxylans (2). [In growing grass cell walls, the arabinoglucuronoxy-lans usually predominate over pectins.]... 

O Neill, M. A., Ishii, T., Albersheim, P, Darvill, A. G. (2004). Rhamnogalacturonan II structure and function of a borate cross-linked cell wall pectic polysaccharide. Ann. Rev. Plant Biol, 55,109-139. 

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