IndraLab
Statements
E3_Ub_ligase binds TP53 and MDM2. 25 / 25
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"Furthermore, another MDM2 inhibitor, Nutlin3, known to block the MDM2-p53 interaction without inhibiting the overall ubiquitin ligase activity of MDM2 xref , xref did not promote the activation of NFATc2 or the induction of cytokines in wild-type naïve CD4 + T cells, although Nutlin-3 did enhance the induction of the p53 target gene p21 ( xref )."
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"For instance, Numb is an important p53 regulator by forming a tripartite complex with tumor suppressor p53 and its E3 ligase, Mdm2, thus inhibiting the degradation of p53 and promoting its tumor suppressive functions. xref Many other functions of Numb, such as muscle stem cell proliferation and regeneration, xref endocytosis and ubiquitination, have also been reported. xref Recently, it was shown that post-translational modifications, including phosphorylation and methylation, can affect Numb functions like asymmetric distribution as well as tumor suppressive roles based on its regulation on p53. xref – xref p53, a well-studied transcription factor, is crucial for mediating cell cycle arrest and apoptosis in response to DNA damage. xref Further, it has been documented that disruption of the p53 pathway has always been associated with therapeutic resistance and poor clinical outcomes. xref Of note, cancer cells without Numb are less sensitive to chemotherapeutic drugs than cells expressing a functional Numb. xref Thus, understanding how Numb is regulated will provide us novel opportunities for improving the efficacy of existing chemotherapy."