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Lookup NU author(s): Professor William Willats
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2021, The Author(s).The charophycean green algae (CGA or basal streptophytes) are of particular evolutionary significance because their ancestors gave rise to land plants. One outstanding feature of these algae is that their cell walls exhibit remarkable similarities to those of land plants. Xyloglucan (XyG) is a major structural component of the cell walls of most land plants and was originally thought to be absent in CGA. This study presents evidence that XyG evolved in the CGA. This is based on a) the identification of orthologs of the genetic machinery to produce XyG, b) the identification of XyG in a range of CGA and, c) the structural elucidation of XyG, including uronic acid-containing XyG, in selected CGA. Most notably, XyG fucosylation, a feature considered as a late evolutionary elaboration of the basic XyG structure and orthologs to the corresponding biosynthetic enzymes are shown to be present in Mesotaenium caldariorum.
Author(s): Mikkelsen MD, Harholt J, Westereng B, Domozych D, Fry SC, Johansen IE, Fangel JU, Lezyk M, Feng T, Nancke L, Mikkelsen JD, Willats WGT, Ulvskov P
Publication type: Article
Publication status: Published
Journal: Communications Biology
Online publication date: 17/06/2021
Acceptance date: 28/05/2021
Date deposited: 28/06/2021
ISSN (electronic): 2399-3642
Publisher: Nature Research
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