Most well studied as proteins that restrain the p53 tumor suppressor protein, MDM2 and MDMX have rich lives outside of their relationship to p53. There is much to learn about how these two proteins are regulated and how they can function in cells that lack p53.

May 1, 2021 · Most well studied as proteins that restrain the p53 tumor suppressor protein, MDM2 and MDMX have rich lives outside of their relationship to p53. There is much to learn about how these two proteins are regulated and how they can function in cells that lack p53.

The MDM2 and MDMX (also known as HDMX and MDM4) proteins are deregulated in many human cancers and exert their oncogenic activity predominantly by inhibiting the p53 tumour suppressor. However, the MDM proteins modulate and respond to many other ...

MDM2 (mouse double minute 2 homolog) and MDMX (double minute X human homolog, also known as MDM4) are critical negative regulators of tumor protein p53. Our recent work shows that MDMX binds to and promotes degradation of retinoblastoma …

Apr 12, 2025 · p53 is a tumor suppressor gene and is regarded as one of the most crucial genes in protecting humans against cancer. The protein Mdm2 and its homolog MdmX serve as negative regulators of p53. In nearly half of cancer cells, there is an overexpression of Mdm2 and MdmX, which inhibit p53 activity. Furthermore, Mdm2’s E3 ubiquitin ligase activity promotes the ubiquitination and degradation of p53.

May 23, 2016 · For more than 25 years, MDM2 and its homolog MDMX (also known as MDM4) have been shown to exert oncogenic activity. These two proteins are best understood as negative regulators of the p53 tumor suppressor, although they …

Mdm2 and MdmX regulate gene expression by multiple modes. Mdm2 and MdmX affect p53-mediated target gene selectivity both directly and indirectly. First, they regulate enzymes that catalyze p53 post-translational modifications as well as p53-mediated chromatin remodeling and p53 interacting co-factors that influence target gene selectivity.

Apr 17, 2020 · MDM2 and MDMX are critical negative regulators of p53 and p73 transcription activity and protein stability. Both MDM2 and MDMX bind to p53 N-terminus and inhibit its transcription activity (upper panel). Besides, MDM2 monoubiqutinates p53, which induces p53 nuclear export and the inability to regulate the expression of the target genes.

In normal cells, MDM2 and MDMX suppress p53 activity, but in the event of cellular stress, they themselves must be inhibited so that p53 may respond to the stress. MDM2 and MDMX are known to bind together, and play multifaceted, non-redundant roles in …

Jan 10, 2013 · The MDM2 and MDMX (also known as HDMX and MDM4) proteins are deregulated in many human cancers and exert their oncogenic activity predominantly by inhibiting the p53 tumour suppressor.