Protein Phosphatases type 2C (PP2Cs) are major regulators of diverse signaling pathways, particularly in higher plants. In Arabidopsis thaliana, abiotic stress signaling is vastly connected to the phytohormone abscisic acid (ABA). PP2Cs from subgroup A serve as co-receptors for ABA and act as major negative regulators. In this work, a complement of PP2C interactions with the regulatory components of the ABA receptor (RCARs), and downstream target proteins was analyzed in yeast and in vivo. The results connect PP2C function to downstream signaling outcome on a molecular level. Furthermore, the conservation of PP2C-RCAR-related signaling modules in other stress response pathways was identified.
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Protein Phosphatases type 2C (PP2Cs) are major regulators of diverse signaling pathways, particularly in higher plants. In Arabidopsis thaliana, abiotic stress signaling is vastly connected to the phytohormone abscisic acid (ABA). PP2Cs from subgroup A serve as co-receptors for ABA and act as major negative regulators. In this work, a complement of PP2C interactions with the regulatory components of the ABA receptor (RCARs), and downstream target proteins was analyzed in yeast and in vivo. The r...
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