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Protein phosphatase 2C (PP2C) function in higher plants

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Abstract

In the past few years, molecular cloning studies have revealed the primary structure of plant protein serine/threonine phosphatases. Two structurally distinct families, the PP1/PP2A family and the PP2C family, are present in plants as well as in animals. This review will focus on the plant PP2C family of protein phosphatases. Biochemical and molecular genetic studies in Arabidopsis have identified PP2C enzymes as key players in plant signal transduction processes. For instance, the ABI1/ABI2 PP2Cs are central components in abscisic acid (ABA) signal transduction. Arabidopsis mutants containing a single amino acid exchange in ABI1 or ABI2 show a reduced response to ABA. Another member of the PP2C family, kinase-associated protein phosphatase (KAPP), appears to be an important element in some receptor-like kinase (RLK) signalling pathways. Finally, an alfalfa PP2C acts as a negative regulator of a plant mitogen-activated protein kinase (MAPK) pathway. Thus, the plant PP2Cs function as regulators of various signal transduction pathways.

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  1. Instituto de Biologia Molecular y Celular de Plantas, Universidad Politecnica – C.S.I.C., Camino de Vera, 46022, Valencia, Spain

    Pedro L. Rodriguez

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Rodriguez, P.L. Protein phosphatase 2C (PP2C) function in higher plants. Plant Mol Biol 38, 919–927 (1998). https://doi.org/10.1023/A:1006054607850

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