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| Content Provider | PubMed Central |
|---|---|
| Author | Müller, Jürgen Ritt, Daniel A. Copeland, Terry D. Morrison, Deborah K. |
| Copyright Year | 2003 |
| Abstract | Cdc25C-associated kinase 1 (C-TAK1) has been implicated in cell cycle regulation and Ras signaling through its interactions with two putative substrates, the Cdc25C phosphatase and the MAPK scaffold KSR1. Here, we identify sequence motifs required for stable C-TAK1 association and substrate phosphorylation. Using a mutational approach to disrupt binding of C-TAK1 to KSR1 and Cdc25C, we demonstrate that C-TAK1 contributes to the regulation of these proteins in vivo through the generation of 14-3-3-binding sites. KSR1 proteins defective in C-TAK1 binding had severely reduced phosphorylation at the 14-3-3-binding site in vivo, were constitutively localized to the plasma membrane and had increased biological activity. Disruption of the Cdc25C–C-TAK1 interaction resulted in reduced 14-3-3-binding site phosphorylation and nuclear accumulation of Cdc25C in interphase cells. Finally, utilizing the acquired C-TAK1 binding and substrate phosphorylation data, we identify plakophilin 2 (PKP2) as a novel C-TAK1 substrate. Phosphorylation of PKP2 by C-TAK1 also generates a 14-3-3-binding site that influences PKP2 localization. These findings underscore the importance of C-TAK1 as a regulator of 14-3-3 binding and protein localization. |
| Related Links | http://dx.doi.org/10.1093/emboj/cdg426 |
| Ending Page | 4442 |
| Page Count | 12 |
| Starting Page | 4431 |
| File Format | |
| ISSN | 14602075 |
| e-ISSN | 14602075 |
| Journal | The EMBO Journal |
| Issue Number | 17 |
| Volume Number | 22 |
| Language | English |
| Publisher | Oxford University Press |
| Publisher Date | 2003-09-01 |
| Access Restriction | Open |
| Rights Holder | Oxford University Press |
| Subject Keyword | Biochemistry, Genetics and Molecular Biology(all) Immunology and Microbiology(all) Neuroscience(all) Molecular Biology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Medicine Molecular Biology |
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