NDLI: The eto1, eto2, and eto3 mutations and cytokinin treatment increase ethylene biosynthesis in Arabidopsis by increasing the stability of ACS protein.

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The eto1, eto2, and eto3 mutations and cytokinin treatment increase ethylene biosynthesis in Arabidopsis by increasing the stability of ACS protein.

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The eto1, eto2, and eto3 mutations and cytokinin treatment increase ethylene biosynthesis in Arabidopsis by increasing the stability of ACS protein.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Chae, Hyun Sook Faure, Francois Kieber, Joseph J.
Description	Country affiliation: United States Author Affiliation: Chae HS ( Department of Biology, University of North Carolina, Chapel Hill, North Carolina 27599-3280, USA.)
Abstract	The Arabidopsis ethylene-overproducing mutants eto1, eto2, and eto3 have been suggested to affect the post-transcriptional regulation of 1-aminocyclopropane-1-carboxylic acid synthase (ACS). Here, we present the positional cloning of the gene corresponding to the dominant eto3 mutation and show that the eto3 phenotype is the result of a missense mutation within the C-terminal domain of ACS9, which encodes one isoform of the Arabidopsis ACS gene family. This mutation is analogous to the dominant eto2 mutation that affects the C-terminal domain of the highly similar ACS5. Analysis of purified recombinant ACS5 and epitope-tagged ACS5 in transgenic Arabidopsis revealed that eto2 does not increase the specific activity of the enzyme either in vitro or in vivo; rather, it increases the half-life of the protein. In a similar manner, cytokinin treatment increased the stability of ACS5 by a mechanism that is at least partially independent of the eto2 mutation. The eto1 mutation was found to act by increasing the function of ACS5 by stabilizing this protein. These results suggest that an important mechanism by which ethylene biosynthesis is controlled is the regulation of the stability of ACS, mediated at least in part through the C-terminal domain.
File Format	HTM / HTML
ISSN	10404651
e-ISSN	1531298X
Journal	THE PLANT CELL ONLINE
Issue Number	2
Volume Number	15
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2003-02-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Botany Arabidopsis Proteins Genetics Arabidopsis Cytokinins Pharmacology Ethylenes Biosynthesis Lyases Amino Acid Sequence Drug Effects Metabolism Dexamethasone Enzyme Stability Gene Expression Regulation, Enzymologic Gene Expression Regulation, Plant Isoenzymes Molecular Sequence Data Mutation Phylogeny Sequence Homology, Amino Acid Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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