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| Content Provider | Springer Nature Link |
|---|---|
| Author | Lynch, Tim Erickson, B. Joy Finkelstein, Ruth R. |
| Copyright Year | 2012 |
| Abstract | Abscisic acid (ABA) signaling via the pyrabactin-resistant and related (PYR/PYL/RCAR) receptors begins with ABA-dependent inactivation of the ABA-insensitive(ABI)-clade protein phosphatases(PP)2Cs, thereby permitting phosphorylation and activation of the Snf1-related (SnRK)2 clade of protein kinases, and activation of their downstream targets such as ABA-response element binding basic leucine zipper (bZIP) transcription factors (ABF/AREB/ABI5 clade). Several of these are also activated by calcium–dependent protein kinases such as CPK11. Turning off ABA response requires turnover and/or inactivation of these transcription factors, which could result from their dephosphorylation. To address the hypothesis that the ABI-clade PP2Cs regulate the bZIPs directly, in addition to their indirect effects via SnRKs, we have assayed interactions between multiple members of the ABF/AREB clade and the PP2Cs by yeast two-hybrid, in vitro phosphatase, and bimolecular fluorescence complementation assays. In addition, we have expanded the list of documented specific interactions among these bZIP proteins and the kinases that could activate them and found that some PP2Cs can also interact directly with CPK11. These studies support specific interactions among kinases, phosphatases and transcription factors that are co-expressed in early seedling development. |
| Starting Page | 647 |
| Ending Page | 658 |
| Page Count | 12 |
| File Format | |
| ISSN | 01674412 |
| Journal | Plant Molecular Biology |
| Volume Number | 80 |
| Issue Number | 6 |
| e-ISSN | 15735028 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2012-09-25 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Abscisic Acid Arabidopsis ABA-insensitive(ABI)5 ABRE binding factors Protein phosphatase 2Cs SnRK2s Calcium-dependent protein kinase(CPK)11 Plant Pathology Plant Sciences Biochemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science Medicine Agronomy and Crop Science |
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