ABI2, a second protein phosphatase 2C involved in abscisic acid signal transduction in Arabidopsis

被引：170

作者：

Rodriguez, PL ^{[1
]}

Benning, G ^{[1
]}

Grill, E ^{[1
]}

机构：

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

来源：

FEBS LETTERS | 1998年 / 421卷 / 03期

关键词：

abscisic acid; protein phosphatase 2C; signal transduction; ABI2; ABI1;

D O I：

10.1016/S0014-5793(97)01558-5

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 abi2-1 (abscisic acid insensitive) mutant of Arabidopsis thaliana shows abscisic acid (ABA) insensitivity with respect to seed germination and vegetative ABA responses, We identified the ABI2 gene by a combination of positional mapping and homology to ABI1. The ABI2 protein shoes 80% amino acid sequence identity to ABI1, a protein phosphatase 2C (PP2C) involved in ABA signaling. The mutation that confers the abi2-1 phenotype is equivalent to the mutation previously identified in abi1-1 and the resulting Gly(168)Asp abi2 protein shows a reduced PP2C activity. Thus, a pair of highly homologous PP2Cs regulate ABA signaling. (C) 1998 Federation of European Biochemical Societies.

引用

页码：185 / 190

页数：6