ABI1 of Arabidopsis is a protein serine/threonine phosphatase highly regulated by the proton and magnesium ion concentration

被引：61

作者：

Leube, MP

Grill, E

Amrhein, N

机构：

[1] Swiss Fed Inst Technol, Inst Pflanzenwissensch, CH-8092 Zurich, Switzerland

[2] Tech Univ Munich, Lehrstuhl Bot, D-80333 Munich, Germany

来源：

FEBS LETTERS | 1998年 / 424卷 / 1-2期

关键词：

protein phosphatase 2C; signal transduction; stoma; dominant negative phenotype; Arabidopsis thaliana;

D O I：

10.1016/S0014-5793(98)00149-5

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 plant hormone abscisic acid (AEA) mediates various. responses such as stomatal closure, maintenance of seed dormancy, and inhibition of plant growth. All three responses are regulated by the ABI1 gene product. The ABI1 protein (ABI1p) has been characterized as a protein serine/threonine phosphatase of type 2C that is highly affected in its activity by changes in the proton and magnesium ion concentrations. In the ABA-insensitive mutant abi1 of Arabidopsis thaliana a single amino acid exchange in the primary structure results in both a dominant insensitive phenotype and a strongly reduced protein phosphatase activity in vitro by possibly impairing metal ion coordination. (C) 1998 Federation of European Biochemical Societies.

引用

页码：100 / 104

页数：5

共 32 条

[1] SENSITIVITY TO ABSCISIC-ACID OF GUARD-CELL K+ CHANNELS IS SUPPRESSED BY ABI1-1, A MUTANT ARABIDOPSIS GENE ENCODING A PUTATIVE PROTEIN PHOSPHATASE [J].