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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kagaya, Yasuaki Hobo, Tokunori Murata, Michiharu Ban, Atushi Hattori, Tsukaho |
| Description | Country affiliation: Japan Author Affiliation: Kagaya Y ( Center for Molecular Biology and Genetics, Mie University, 1515 Kamihama-cho, Tsu 514-8507, Japan.) |
| Abstract | The rice basic domain/Leu zipper factor TRAB1 binds to abscisic acid (ABA) response elements and mediates ABA signals to activate transcription. We show that TRAB1 is phosphorylated rapidly in an in vivo labeling experiment and by phosphatase-sensitive mobility shifts on SDS-polyacrylamide gels. We had shown previously that a chimeric promoter containing GAL4 binding sites became ABA inducible when a GAL4 binding domain-TRAB1 fusion protein was present. This expression system allowed us to assay the ABA response function of TRAB1. Using this system, we show that Ser-102 of TRAB1 is critical for this function. Because no ABA-induced mobility shift was observed when Ser-102 was replaced by Ala, we suggest that this Ser residue is phosphorylated in response to ABA. Cell fractionation experiments, as well as fluorescence microscopy observations of transiently expressed green fluorescent protein-TRAB1 fusion protein, indicated that TRAB1 was localized in the nucleus independently of ABA. Our results suggest that the terminal or nearly terminal event of the primary ABA signal transduction pathway is the phosphorylation in the nucleus of preexisting TRAB1. |
| File Format | HTM / HTML |
| ISSN | 10404651 |
| e-ISSN | 1531298X |
| Journal | THE PLANT CELL ONLINE |
| Issue Number | 12 |
| Volume Number | 14 |
| Language | English |
| Publisher | American Society of Plant Biologists |
| Publisher Date | 2002-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Botany Abscisic Acid Pharmacology Oryza Sativa Metabolism Transcription Factors Amino Acid Sequence Basic-leucine Zipper Transcription Factors Conserved Sequence Genetics Physiology Gene Expression Regulation, Plant Drug Effects Green Fluorescent Proteins Leucine Zippers Luminescent Proteins Molecular Sequence Data Nuclear Proteins Phosphorylation Plant Proteins Plants, Genetically Modified Recombinant Fusion Proteins Sequence Homology, Amino Acid Serine Signal Transduction Transcription, Genetic Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Plant Science |
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