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

作者：Rodriguez PL; Benning G; Grill E^*

来源：FEBS Letters, 1998, 421(3): 185-190.

DOI：10.1016/S0014-5793(97)01558-5

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

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.

• 出版日期1998-1-16