| First Author | Ryo A | Year | 2003 |
| Journal | Mol Cell | Volume | 12 |
| Issue | 6 | Pages | 1413-26 |
| PubMed ID | 14690596 | Mgi Jnum | J:125578 |
| Mgi Id | MGI:3759178 | Doi | 10.1016/s1097-2765(03)00490-8 |
| Citation | Ryo A, et al. (2003) Regulation of NF-kappaB signaling by Pin1-dependent prolyl isomerization and ubiquitin-mediated proteolysis of p65/RelA. Mol Cell 12(6):1413-26 |
| abstractText | The transcription factor NF-kappaB is activated by the degradation of its inhibitor IkappaBalpha, resulting in its nuclear translocation. However, the mechanism by which nuclear NF-kappaB is subsequently regulated is not clear. Here we demonstrate that NF-kappaB function is regulated by Pin1-mediated prolyl isomerization and ubiquitin-mediated proteolysis of its p65/RelA subunit. Upon cytokine treatment, Pin1 binds to the pThr254-Pro motif in p65 and inhibits p65 binding to IkappaBalpha, resulting in increased nuclear accumulation and protein stability of p65 and enhanced NF-kappaB activity. Significantly, Pin1-deficient mice and cells are refractory to NF-kappaB activation by cytokine signals. Moreover, the stability of p65 is controlled by ubiquitin-mediated proteolysis, facilitated by a cytokine signal inhibitor, SOCS-1, acting as a ubiquitin ligase. These findings uncover two important mechanisms of regulating NF-kappaB signaling and offer new insight into the pathogenesis and treatment of some human diseases such as cancers. |
