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An Arabidopsis neutral ceramidase mutant ncer1 accumulates hydroxyceramides and is sensitive to oxidative stress

文献类型： 外文期刊

作者： Li, Jian 1 ; Bi, Fang-Cheng 1 ; Yin, Jian 1 ; Wu, Jian-Xin 1 ; Rong, Chan 1 ; Wu, Jia-Li 1 ; Yao, Nan 1 ;

作者机构： 1.Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangdong Key Lab Plant Resources, Guangzhou 510275, Guangdong, Peoples R China

2.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangz

关键词： Arabidopsis neutral ceramidases;oxidative stress;sphingolipids;hydroxyceramides;ceramides

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2015 年 6 卷

页码：

收录情况： SCI

摘要： Ceramidases hydrolyze ceramide into sphingosine and fatty acids and, although ceramidases function as key regulators of sphingolipid homeostasis in mammals, their roles in plants remain largely unknown. Here, we characterized the Arabidopsis thaliana ceramidase AtNCER1, a homolog of human neutral ceramidase. AtNCER1 localizes predominantly on the endoplasmic reticulum. The ncerl T-DNA insertion mutants had no visible phenotype, but accumulated hydroxyceramides, and showed increased sensitivity to oxidative stress induced by methyl viologen. Plants over-expressing AtNCER1 showed increased tolerance to oxidative stress. These data indicate that the Arabidopsis neutral ceramidase affects sphingolipid homeostasis and oxidative stress responses.

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