Deciphering the transcriptional complex critical for RhoA gene expression and cancer metastasis.

Deciphering the transcriptional complex critical for RhoA gene expression and cancer metastasis.
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DOI:
10.1038/ncb2047
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发表时间:
2010-05
影响因子:
21.3
通讯作者:
Lin, Hui-Kuan
Lin, Hui-Kuan
中科院分区:
生物学1区
文献类型:
--
作者:
Chan, Chia-Hsin;Lee, Szu-Wei;Li, Chien-Feng;Wang, Jing;Yang, Wei-Lei;Wu, Ching-Yuan;Wu, Juan;Nakayama, Keiichi I.;Kang, Hong-Yo;Huang, Hsuan-Ying;Hung, Mien-Chie;Pandolfi, Pier Paolo;Lin, Hui-Kuan

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RhoA GTPase plays a crucial role in numerous biological functions and is linked to cancer metastasis. However, the understanding of the molecular mechanism responsible for RhoA transcription is still very limited. Here we show that RhoA transcription is orchestrated by the Myc/Skp2/Miz1/p300 transcription complex. Skp2 cooperates with Myc to induce RhoA transcription by recruiting Miz1 and p300 to the RhoA promoter independently of SCF-Skp2 E3 ligase activity. Deficiency of this complex results in impairment in RhoA expression, cell migration, invasion, and breast cancer metastasis, recapitulating the phenotypes observed in RhoA knockdown, and RhoA restoration rescues the defect in cell invasion. Strikingly, the overexpression of Myc/Skp2/Miz1 complex is found in metastatic human cancers and correlated with RhoA expression. Our study provides great insight into how oncogenic Skp2 and Myc coordinate to induce RhoA transcription and establishes a novel SCF-Skp2 E3 ligase-independent function for oncogenic Skp2 in transcription and cancer metastasis.
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