RRC ID 54603
Author Francoz E, Ranocha P, Le Ru A, Martinez Y, Fourquaux I, Jauneau A, Dunand C, Burlat V.
Title Pectin Demethylesterification Generates Platforms that Anchor Peroxidases to Remodel Plant Cell Wall Domains.
Journal Dev Cell
Abstract Plant cell walls are made of polysaccharidic-proteinaceous complex matrices. Molecular interactions governing their organization remain understudied. We take advantage of the highly dynamic cell walls of Arabidopsis seed mucilage secretory cells to propose a hierarchical multi-molecular interaction model within a cell wall domain. We show that the PECTINMETHYLESTERASE INHIBITOR6 activity creates a partially demethylesterified pectin pattern acting as a platform allowing positioning of PEROXIDASE36 in a remote primary cell wall domain during early development. This allows triggering the loosening of this domain during later development, in turn leading to proper physiological function upon mature seed imbibition and germination. We anticipate that this pioneer example of molecular scaffold within a cell wall domain is more widespread through other combinations of the individual molecular players all belonging to large multigenic families. These results highlight the role of cell wall polysaccharide-protein interactions in the organization of cell wall domains.
Volume 48(2)
Pages 261-276.e8
Published 2019-1-28
DOI 10.1016/j.devcel.2018.11.016
PII S1534-5807(18)30972-9
PMID 30555001
MeSH Arabidopsis / metabolism Arabidopsis Proteins / metabolism Cell Wall / drug effects* Cell Wall / metabolism Gene Expression Regulation, Plant / drug effects* Mutation / drug effects Pectins Peroxidases / drug effects* Plant Extracts / pharmacology* Seeds / growth & development
IF 9.19
Times Cited 7
Arabidopsis / Cultured plant cells, genes pda20378 pda02873