FOXO转录因子的定位调节
中文名称
通路描述
FOXO转录因子的定位,包括FOXO1、FOXO3和FOXO4,由AKT介导的磷酸化调节。在缺乏PI3K/AKT信号时,FOXO1、FOXO3和FOXO4定位于细胞核。AKT介导的磷酸化诱导构象变化,暴露出核输出信号(NES),并促进FOXO1、FOXO3和FOXO4向细胞质转运(Rena 等,1999;Brunet 等,1999;Kops 等,1999)。AKT磷酸化的FOXO1、FOXO3和FOXO4与14-3-3蛋白结合,有助于其保留在细胞质中(Rena 等,2001;Brunet 等,1999;Arimoto Ishida 等,2004;Obsilova 等,2005;Boura 等,2007;Silhan 等,2009)。FOXO6缺乏NES序列,且仅局限于细胞核,但PI3K/AKT信号诱导的磷酸化影响FOXO6的转录活性(Jacobs 等,2003;van der Heide 等,2005)。
英文描述
Regulation of localization of FOXO transcription factors Localization of FOXO transcription factors FOXO1, FOXO3 and FOXO4 is regulated by AKT-mediated phosphorylation. In the absence of PI3K/AKT signaling, FOXO1, FOXO3 and FOXO4 localize to the nucleus. AKT-mediated phosphorylation induces a conformational change that exposes a nuclear export signal (NES) and promotes translocation of FOXO1, FOXO3 and FOXO4 to the cytosol (Rena et al. 1999, Brunet et al. 1999, Kops et al. 1999). AKT-phosphorylated FOXO1, FOXO3 and FOXO4 bind to 14-3-3 proteins, which contributes to their retention in the cytosol (Rena et al. 2001, Brunet et al. 1999, Arimoto Ishida et al. 2004, Obsilova et al. 2005, Boura et al. 2007, Silhan et al. 2009). FOXO6 lacks the NES sequence and is exclusively nuclear, but phosphorylation in response to PI3K/AKT signaling affects the transcriptional activity of FOXO6 (Jacobs et al. 2003, van der Heide et al. 2005).
所含基因
12 个基因