Ting Zhou, Zhiqiang Ke, Qianqian Ma, Jiani Xiang, Meng Gao, Yongqi Huang, Xiyao Cheng, Zhengding Su
Scientific reports 2023 Dec 11The tumor suppressor p53 (p53) is regulated by murine double minute 2 (Mdm2) and its homologous MdmX in maintaining the basal level of p53. Overexpressed Mdm2/MdmX inhibits cellular p53 activity, which is highly relevant to cancer occurrence. Coiled-coil domain-containing protein 106 (CCDC106) has been identified as a p53-interacting partner. However, the molecular mechanism of the p53/Mdm2/MdmX/CCDC106 interactions is still elusive. Here, we show that CCDC106 functions as a signaling regulator of the p53-Mdm2/MdmX axis. We identified that CCDC106 directly interacts with the p53 transactivation domain by competing with Mdm2 and MdmX. CCDC106 overexpression downregulates the cellular level of p53 and Mdm2/MdmX, and decreased p53 reversibly downregulates the cellular level of CCDC106. Our work provides a molecular mechanism by which CCDC106 regulates the cellular levels of p53 and Mdm2/MdmX. © 2023. The Author(s).
Ting Zhou, Zhiqiang Ke, Qianqian Ma, Jiani Xiang, Meng Gao, Yongqi Huang, Xiyao Cheng, Zhengding Su. Molecular mechanism of CCDC106 regulating the p53-Mdm2/MdmX signaling axis. Scientific reports. 2023 Dec 11;13(1):21892
PMID: 38081879
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