Substitution of L-fucose by L-galactose in cell walls of Arabidopsis mur1 |
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Authors: | E Zablackis WS York M Pauly S Hantus WD Reiter CC Chapple P Albersheim A Darvill |
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Affiliation: | Complex Carbohydrate Research Center, University of Georgia, Athens 30602-4712, USA. |
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Abstract: | An Arabidopsis thaliana mutant (mur1) has less than 2 percent of the normal amounts of L-fucose in the primary cell walls of aerial portions of the plant. The survival of mur1 plants challenged the hypothesis that fucose is a required component of biologically active oligosaccharides derived from cell wall xyloglucan. However, the replacement of L-fucose (that is, 6-deoxy-L-galactose) by L-galactose does not detectably alter the biological activity of the oligosaccharides derived from xyloglucan. Thus, essential structural and conformational features of xyloglucan and xyloglucan-derived oligosaccharides are retained when L-galactose replaces L-fucose. |
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