...
首页> 外文期刊>Cell cycle >p73-mediated transcriptional activity is negatively regulated by polo-like kinase 1.
【24h】

p73-mediated transcriptional activity is negatively regulated by polo-like kinase 1.

机译:P73介导的转录活性由Polo样激酶1负调节。

获取原文
获取原文并翻译 | 示例
           

摘要

Trans-activating (TA) p73 is a member of the p53 family of transcription factors and has been implicated in cell cycle regulation, apoptosis and developmental processes. Although TAp73 positively regulates an overlapping repertoire of genes regulated by p53, TAp73 has been observed to be paradoxically overexpressed in a number of tumor cell types arousing much interest in the post-translational regulation of TAp73 transcriptional activity. Here, we present novel findings that show TAp73 can interact and co-localise, with Polo-Like Kinase 1 (PLK1) and that TAp73 is phosphorylated by this kinase on Threonine-27 (Thr-27) within the TA domain. Using reporter assays and Electrophoretic Mobility Shift Assays (EMSA), our findings suggest that TAp73-mediated activation of the p21(cip/waf), 14-3-3sigma and Bax gene promoters is abrogated by expressed PLK1 for which post-translational modification of TAp73 Thr-27 appears to be a key step in MCF7 cells. Thus highlighting a potential mechanism that uniquely contributes to PLK1-mediated and phosphor-dependent transcriptional deactivation of expressed TAp73.
机译:反式激活(TA)P73是P53系列转录因子的成员,并涉及细胞周期调节,细胞凋亡和发育过程。尽管Tap73积极地调节P53调节的重叠曲目,但是观察到在许多肿瘤细胞类型中观察到矛盾的过表达,这唤起了对TAP73转录活动的翻译后调节的兴趣很大。在这里,我们提出了表演Tap73可以与TA域-27(Thr-27)上的Polo样激酶1(PLK1)进行相互作用和共同定位的新发现和共定位。使用报道分析和电泳迁移率移位测定(EMSA),我们的研究结果表明,TAP73介导的P21(CIP / WAF)的激活是通过表达的PLK1消除的P21(CIP / WAF),14-3-3-3sigma和Bax基因启动子的转换后改性TAP73 THR-27似乎是MCF7单元格中的一个关键步骤。因此,突出了一种潜在的机制,其唯一有助于表达TAP73的PLK1介导和磷光体依赖性转录失活。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号