Uclacyanin Proteins Are Required for Lignified Nanodomain Formation within Casparian Strips.
Casparian strips
Uclacyanin
endodermis
extracellular diffusion barriers
lignin
nanodomain
phytocyanin
plant cell wall
Journal
Current biology : CB
ISSN: 1879-0445
Titre abrégé: Curr Biol
Pays: England
ID NLM: 9107782
Informations de publication
Date de publication:
19 10 2020
19 10 2020
Historique:
received:
29
04
2020
revised:
14
07
2020
accepted:
28
07
2020
pubmed:
29
8
2020
medline:
13
8
2021
entrez:
29
8
2020
Statut:
ppublish
Résumé
Casparian strips (CSs) are cell wall modifications of vascular plants restricting extracellular free diffusion into and out of the vascular system [1]. This barrier plays a critical role in controlling the acquisition of nutrients and water necessary for normal plant development [2-5]. CSs are formed by the precise deposition of a band of lignin approximately 2 μm wide and 150 nm thick spanning the apoplastic space between adjacent endodermal cells [6, 7]. Here, we identified a copper-containing protein, Uclacyanin1 (UCC1), that is sub-compartmentalized within the CS. UCC1 forms a central CS nanodomain in comparison with other CS-located proteins that are found to be mainly accumulated at the periphery of the CS. We found that loss-of-function of two uclacyanins (UCC1 and UCC2) reduces lignification specifically in this central CS nanodomain, revealing a nano-compartmentalized machinery for lignin polymerization. This loss of lignification leads to increased endodermal permeability and, consequently, to a loss of mineral nutrient homeostasis.
Identifiants
pubmed: 32857976
pii: S0960-9822(20)31154-4
doi: 10.1016/j.cub.2020.07.095
pmc: PMC7575197
pii:
doi:
Substances chimiques
Arabidopsis Proteins
0
Metalloproteins
0
UCLACYANIN I protein, Arabidopsis
0
Uclacyanin II protein, Arabidopsis
0
Lignin
9005-53-2
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
4103-4111.e6Subventions
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/N023927/1
Pays : United Kingdom
Commentaires et corrections
Type : CommentIn
Informations de copyright
Copyright © 2020 The Author(s). Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests The authors declare no competing interests.
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