Outstanding questions on xylan biosynthesis
Copyright © 2022 Elsevier B.V. All rights reserved.
| Publié dans: | Plant science : an international journal of experimental plant biology. - 1985. - 325(2022) vom: 20. Dez., Seite 111476 |
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| Auteur principal: | |
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| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2022
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| Accès à la collection: | Plant science : an international journal of experimental plant biology |
| Sujets: | Journal Article Review Arabinosyltransferase Ferulic acid Glucuronyltransferase Glycosyltransferase Grass Hydroxycinnamate Secondary wall Xylan plus... |
| Résumé: | Copyright © 2022 Elsevier B.V. All rights reserved. Xylan is the second most abundant polysaccharide in plant biomass. It is a crucial component of cell wall structure as well as a significant factor contributing to biomass recalcitrance. Xylan consists of a linear chain of β-1,4-linked xylosyl residues that are often substituted with glycosyl side chains, such as glucuronosyl/methylglucuronosyl and arabinofuranosyl residues, and acetylated at O-2 and/or O-3. Xylan from gymnosperms and dicots contains a unique reducing end tetrasaccharide sequence that is not detected in xylan from grasses, bryophytes and seedless vascular plants. Grass xylan is heavily decorated at O-3 with arabinofuranosyl residues that are frequently esterified with hydroxycinnamates. Genetic and biochemical studies have uncovered a number of genes involved in xylan backbone elongation and acetylation, xylan glycosyl substitutions and their modifications, and the synthesis of the unique xylan reducing end tetrasaccharide sequence, but some outstanding issues on the biosynthesis of xylan still remain unanswered. Here, we provide a brief overview of xylan structure and focus on discussion of the current understanding and open questions on xylan biosynthesis. Further elucidation of the biochemical mechanisms underlying xylan biosynthesis will not only shed new insights into cell wall biology but also provide molecular tools for genetic modification of biomass composition tailored for diverse end uses |
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| Description: | Date Completed 01.11.2022 Date Revised 01.11.2022 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2259 |
| DOI: | 10.1016/j.plantsci.2022.111476 |