A Protein Farnesyl Transferase Involved in Abscisic Acid Signal Transduction in Arabidopsis

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Science  30 Aug 1996:
Vol. 273, Issue 5279, pp. 1239-1241
DOI: 10.1126/science.273.5279.1239


The hormone abscisic acid (ABA) modulates a variety of developmental processes and responses to environmental stress in higher plants. A collection of mutations, designated era, in Arabidopsis thaliana that confer an enhanced response to exogenous ABA includes mutations in the Era1 gene, which encodes the β subunit of a protein farnesyl transferase. In yeast and mammalian systems, farnesyl transferases modify several signal transduction proteins for membrane localization. The era1 mutants suggest that a negative regulator of ABA sensitivity must be acted on by a farnesyl transferase to function.

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