Mixed-linkage (1 fi 3),(1 fi 4)-b-D-glucan is not unique to the Poales and is an abundant component of Equisetum arvense cell walls
نویسندگان
چکیده
Iben Sørensen, Filomena A. Pettolino, Sarah M. Wilson, Monika S. Doblin, Bo Johansen, Antony Bacic and William G. T. Willats Department of Biology, The University of Copenhagen, Ole Maaløes vej 5, Copenhagen DK-2200, Denmark, Plant Cell Biology Research Centre, School of Botany, University of Melbourne, Melbourne, Vic. 3010, Australia, Department of Biology, The University of Copenhagen, Østerfarimagsgade 2D, Copenhagen DK-1353, Denmark, and Australian Centre for Plant Functional Genomics, School of Botany, University of Melbourne, Melbourne, Vic. 3010, Australia
منابع مشابه
The maize mixed-linkage (1->3),(1->4)-beta-D-glucan polysaccharide is synthesized at the golgi membrane.
With the exception of cellulose and callose, the cell wall polysaccharides are synthesized in Golgi membranes, packaged into vesicles, and exported to the plasma membrane where they are integrated into the microfibrillar structure. Consistent with this paradigm, several published reports have shown that the maize (Zea mays) mixed-linkage (1-->3),(1-->4)-beta-D-glucan, a polysaccharide that amon...
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Mixed-linkage glucan∶xyloglucan endotransglucosylase (MXE) is one of the three activities of the recently characterised hetero-trans-β-glucanase (HTG), which among land plants is known only from Equisetum species. The biochemical details of the MXE reaction were incompletely understood - details that would promote understanding of MXE's role in vivo and enable its full technological exploitatio...
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Yeast glucan as normally prepared by various treatments of yeast (Saccharomyces cerevisiae) cell walls to remove mannan and glycogen is still heterogeneous. The major component (about 85 %) is a branched fi-(1 -+3)-glucan of high molecular weight (about 240000) containing 3% of f-(1 -÷6)-glucosidic interchain linkages. The minor component is a branched ,-(I -÷6)-glucan. A comparison of our resu...
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Cell walls are metabolically active components of plant cells. They contain diverse enzymes, including transglycanases (endotransglycosylases), enzymes that 'cut and paste' certain structural polysaccharide molecules and thus potentially remodel the wall during growth and development. Known transglycanase activities modify several cell-wall polysaccharides (xyloglucan, mannans, mixed-linkage β-...
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An endoglucanase was isolated from cell walls of Zea mays seedlings. Characterization of the hydrolytic activity of this glucanase using model substrates indicated a high specificity for molecules containing intramolecular (1-->3),(1-->4)-beta-d-glucosyl sequences. Substrates with (1-->4)-beta-glucosyl linkages, such as carboxymethylcellulose and xyloglucan were, degraded to a limited extent by...
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