Arabidopsis ABA response gene ABI1: features of a calcium-modulated protein phosphatase.

J LEUNG, M Bouvier-Durand, PC MORRIS, D GUERRIER, F Chefdor, J Giraudat

    Research output: Contribution to journalArticle

    Abstract

    The Arabidopsis ABI1 locus is essential for a wide spectrum of abscisic acid (ABA) responses throughout plant development. Here, ABI1 was shown to regulate stomatal aperture in leaves and mitotic activity in root meristems. The ABI1 gene was cloned and predicted to encode a signaling protein. Although its carboxyl-terminal domain is related to serine-threonine phosphatase 2C, the ABI1 protein has a unique amino-terminal extension containing an EF hand calcium-binding site. These results suggest that the ABI1 protein is a Ca2+-modulated phosphatase and functions to integrate ABA and Ca2+ signals with phosphorylation-dependent response pathways.

    Original languageEnglish
    Pages (from-to)1448-1452
    Number of pages5
    JournalScience
    Volume264
    Issue number5164
    Publication statusPublished - 3 Jun 1994

    Keywords

    • COLD-ACCLIMATION
    • ABSCISIC-ACID
    • GUARD-CELLS
    • ARTIFICIAL CHROMOSOME LIBRARY
    • EXPRESSION
    • ACTIVATOR
    • MUTATIONS
    • CLONING
    • STOMATA
    • THALIANA L HEYNH

    Cite this

    LEUNG, J., Bouvier-Durand, M., MORRIS, PC., GUERRIER, D., Chefdor, F., & Giraudat, J. (1994). Arabidopsis ABA response gene ABI1: features of a calcium-modulated protein phosphatase. Science, 264(5164), 1448-1452.