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https://hdl.handle.net/2440/150
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Type: | Journal article |
Title: | Structure and function of cereal and related higher plant (1→4)-β-xylan endohyrolases |
Other Titles: | Structure and function of cereal and related higher plant (1->4)-beta-xylan endohyrolases |
Author: | Simpson, D. Fincher, G. Huang, A. Cameron-Mills, V. |
Citation: | Journal of Cereal Science, 2003; 37(2):111-127 |
Publisher: | Academic Press Ltd |
Issue Date: | 2003 |
ISSN: | 0733-5210 |
Statement of Responsibility: | David J. Simpson, Geoffrey B. Fincher, Anthony H. C. Huang and Verena Cameron-Mills |
Abstract: | (1→4)-β-Xylan endohydrolases (EC 3.2.1.8) are key enzymes in the metabolism of heteroxylans, which are particularly abundant polymers in the cell wall matrix of cereals. They hydrolyse the internal(1→4)-β-xylosidic linkages of the xylan backbone of arabinoxylan, and together with other endo- and exohydrolases contribute to the degradation and re-modelling of plant cell walls. Their catalytic mechanism and substrate binding properties are largely deduced from (1→4)-β-xylan endohydrolases of fungal and saprophytic bacterial origin, since relatively few of plant origin have been studied. Recent advances in our understanding of the structure-function properties of a barley (1→4)-β-xylan endohydrolase has prompted us to re-examine the sequence data of four related cereal enzymes and to assemble a comprehensive comparison of their primary structure and predicted functional domains. The common structural motifs in these cereal enzymes are further compared with those of 11 related (1→4)-β-xylan endohydrolases, whose sequence was deduced from the Arabidopsis genome. Our structural analyses predict a role for several conserved residues and domains in either the carbohydrate-binding, catalytic activity, or sub-cellular localisation of these plant enzymes, whose future investigation could enhance our understanding of cell wall metabolism. |
Keywords: | Arabinoxylan, (1→4)-β-xylan endohydrolase, CBM22 domain, phylogeny |
DOI: | 10.1006/jcrs.2002.0488 |
Published version: | http://dx.doi.org/10.1006/jcrs.2002.0488 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 2 |
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