Arabidopsis RNA-binding protein UBA2a relocalizes into nuclear speckles in response to abscisic acid

被引：39

作者：

Riera, Marta ^{[1
]}

Redko, Yulia ^{[1
]}

Leung, Jeffrey ^{[1
]}

机构：

[1] CNRS, Inst Sci Vegetal, UPR 2355, F-91198 Gif Sur Yvette, France

来源：

FEBS LETTERS | 2006年 / 580卷 / 17期

关键词：

abscisic acid; RNA binding protein; OST1; kinase; Arabidopsis thaliana;

D O I：

10.1016/j.febslet.2006.06.064

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：

The Arabidopsis thaliana RNA binding protein UBA2a is the closest homologue of the Vicia faba AKIP1 (56% identity). Like AKIP1, UBA2a is a constitutively-expressed nuclear protein and in response to ABA it is also reorganized within the nucleus in "speckles" suggesting a possible role of this protein in the regulation of mRNA metabolism during ABA signaling. AKIP1 interacts with, and is phosphorylated by, the upstream ABA-activated protein kinase AAPK. We have investigated if a pathway similar to that described in Vicia faba also exists in Arabidopsis. Our results showed that despite the resemblance between the corresponding Vicia and Arabidopsis proteins, it appears that the function of UBA2a is independent of OST1 phosphorylation. (c) 2006 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.

引用

页码：4160 / 4165

页数：6

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