Desaturase mutants reveal that membrane rigidification acts as a cold perception mechanism upstream of the diacylglycerol kinase pathway in Arabidopsis cells

被引：95

作者：

Vaultier, Marie-Noelle ^{[1
]}

Cantrel, Catherine ^{[1
]}

Vergnolle, Chantal ^{[1
]}

Justin, Anne-Marie ^{[1
]}

Demandre, Chantal ^{[1
]}

Benhassaine-Kesri, Ghouziel ^{[1
]}

Cicek, Dominique ^{[1
]}

Zachowski, Alain ^{[1
]}

Ruelland, Eric ^{[1
]}

机构：

[1] Univ Paris 06, CNRS, PCMP, FRE 2846, F-94200 Ivry, France

来源：

FEBS LETTERS | 2006年 / 580卷 / 17期

关键词：

cold sensing; membrane fluidity; diacylglycerol; kinase; Arabidopsis thaliana;

D O I：

10.1016/j.febslet.2006.06.083

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Membrane rigidification could be the first step of cold perception in poikilotherms. We have investigated its implication in diacylglycerol kinase (DAGK) activation by cold stress in suspension cells from Arahidopsis mutants altered in desaturase activities. By lateral diffusion assay, we showed that plasma membrane rigidification with temperature decrease was steeper in cells deficient in oleate desaturase than in wild type cells and in cells overexpressing linoleate desaturase. The threshold for the activation of the DAGK pathway in each type of cells correlated with this order of rigidification rate, suggesting that cold induced-membrane rigidification is upstream of DAGK pathway activation. (c) 2006 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.

引用

页码：4218 / 4223

页数：6

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