2021 journal article

A G protein-coupled receptor-like module regulates cellulose synthase secretion from the endomembrane system in Arabidopsis

DEVELOPMENTAL CELL, 56(10), 1484-+.

By: H. McFarlane *, D. Mutwil-Anderwald *, J. Verbancic *, K. Picard *, T. Gookin *, A. Froehlich*, D. Chakravorty *, L. Trindade * ...

MeSH headings : Arabidopsis / metabolism; Arabidopsis Proteins / metabolism; Cell Membrane / metabolism; Cell Wall / metabolism; GTP-Binding Proteins / genetics; GTP-Binding Proteins / metabolism; Glucosyltransferases / metabolism; Membrane Proteins / metabolism; Multiprotein Complexes / metabolism; Mutation / genetics; Protein Binding; Receptors, G-Protein-Coupled / metabolism; Seedlings / growth & development; Seedlings / ultrastructure; Signal Transduction; Stress, Physiological; trans-Golgi Network / metabolism; trans-Golgi Network / ultrastructure
TL;DR: This work identifies members of a family of seven transmembrane domain-containing proteins (7TMs) that are important for cellulose production during cell wall integrity stress and outlines how a G protein-coupled module regulates CESA trafficking and reveals that defects in this process lead to exacerbated responses to cell wall Integrity stress. (via Semantic Scholar)
Source: Web Of Science
Added: June 10, 2021

Cellulose is produced at the plasma membrane of plant cells by cellulose synthase (CESA) complexes (CSCs). CSCs are assembled in the endomembrane system and then trafficked to the plasma membrane. Because CESAs are only active in the plasma membrane, control of CSC secretion regulates cellulose synthesis. We identified members of a family of seven transmembrane domain-containing proteins (7TMs) that are important for cellulose production during cell wall integrity stress. 7TMs are often associated with guanine nucleotide-binding (G) protein signaling and we found that mutants affecting the Gβγ dimer phenocopied the 7tm mutants. Unexpectedly, the 7TMs localized to the Golgi/trans-Golgi network where they interacted with G protein components. Here, the 7TMs and Gβγ regulated CESA trafficking but did not affect general protein secretion. Our results outline how a G protein-coupled module regulates CESA trafficking and reveal that defects in this process lead to exacerbated responses to cell wall integrity stress.