| First Author | Ren F | Year | 2015 |
| Journal | FEBS Lett | Volume | 589 |
| Issue | 15 | Pages | 1890-6 |
| PubMed ID | 26026268 | Mgi Jnum | J:223391 |
| Mgi Id | MGI:5648764 | Doi | 10.1016/j.febslet.2015.05.031 |
| Citation | Ren F, et al. (2015) Nuclear termination of STAT3 signaling through SIPAR (STAT3-Interacting Protein As a Repressor)-dependent recruitment of T cell tyrosine phosphatase TC-PTP. FEBS Lett 589(15):1890-6 |
| abstractText | STAT3 is associated with embryo development and survival as well as proliferation and metastasis of tumor cells. In a previous study, we demonstrated that STAT3-Interacting Protein As a Repressor (SIPAR) enhances the dephosphorylation of STAT3 and negatively regulates its activity. However, it remains unclear how SIPAR inhibits phosphorylation of STAT3. Here we demonstrate that SIPAR directly interacts with T cell protein tyrosine phosphatase TC45 and enhances its association with STAT3. This interaction triggers an accelerated dephosphorylation process for STAT3. Furthermore, SIPAR inhibits the transcriptional activity of STAT3 in wild-type MEF cells but not in TC45 null MEF cells. These results suggest that SIPAR terminates the activation of STAT3 through a dephosphorylation process that is dependent upon interaction with TC45 in the nucleus. |
