PTPN14 interacts with and negatively regulates the oncogenic function of YAP.

PTPN14 interacts with and negatively regulates the oncogenic function of YAP.
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DOI:
10.1038/onc.2012.147
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发表时间:
2013-03-07
期刊:
影响因子:
8
通讯作者:
Zhang, J.
Zhang, J.
中科院分区:
医学1区
文献类型:
--
作者:
Liu, X.;Yang, N.;Figel, S. A.;Wilson, K. E.;Morrison, C. D.;Gelman, I. H.;Zhang, J.

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Hippo信号通路调节细胞增殖和存活,从而对正常细胞命运和肿瘤发生产生深远影响。该途径的关键效应子是雅普,其是在小鼠和人类癌症中扩增的转录共激活因子,其中其促进上皮向间充质转化和恶性转化。在这里,我们报告了一种新的调节机制,雅普致癌功能通过直接相互作用与非受体酪氨酸磷酸酶14(PTPN 14)通过WW结构域的雅普和PPxY结构域的PTPN 14。我们还发现雅普是PTPN 14的直接底物。此外,荧光素酶报告基因分析显示PTPN 14对雅普转录共激活因子功能的抑制是通过它们的蛋白质相互作用介导的,并且可能是由于无活性的细胞质形式的雅普的增加。最后,PTPN 14的敲低诱导雅普的核滞留并增加YAP依赖的细胞迁移。总之,我们的研究结果表明PTPN 14对雅普的潜在调节作用,并证明了雅普调节的新机制。
The Hippo signaling pathway regulates cellular proliferation and survival, thus exerting profound effects on normal cell fate and tumorigenesis. The pivotal effector of this pathway is YAP, a transcriptional co-activator amplified in mouse and human cancers where it promotes epithelial-to-mesenchymal transition and malignant transformation. Here, we report a novel regulatory mechanism for the YAP oncogenic function via direct interaction with non-receptor tyrosine phosphatase 14 (PTPN14) through the WW domain of YAP and the PPxY domain of PTPN14. We also found that YAP is a direct substrate of PTPN14. In addition, luciferase reporter assay showed that the inhibition of the YAP transcriptional co-activator function by PTPN14 is mediated through their protein interactions and may result from an increase in the inactive cytoplasmic form of YAP. Last, knockdown of PTPN14 induces the nuclear retention of YAP and increases the YAP-dependent cell migration. In summary, our results indicate a potential regulatory role of PTPN14 on YAP and demonstrate a novel mechanism in YAP regulation.
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