Fam83F induces p53 stabilisation and promotes its activity

Area of Science:

• Molecular Biology
• Cancer Research
• Cell Biology

Background:

• p53 is a critical tumor suppressor protein activated by DNA damage.
• Dysregulation of p53 activity is linked to cancer development.
• Maintaining p53 protein levels and activity is crucial for cellular integrity.

Purpose of the Study:

• To investigate the role of Fam83F in regulating p53 protein.
• To determine Fam83F's impact on the DNA damage response.
• To explore Fam83F's effect on both wild-type and mutant p53.

Main Methods:

• Protein stabilization assays to assess Fam83F's effect on p53 levels.
• Ubiquitination and degradation assays to understand the mechanism of p53 regulation.
• Cell culture experiments and zebrafish embryo studies to evaluate p53 activity.
• Analysis of p53 target gene transcription and cell proliferation rates.

Main Results:

• Fam83F increases p53 protein levels through stabilization, reducing its ubiquitination and degradation.
• Fam83F is induced by DNA damage and enhances p53 activity in cellular and in vivo models.
• Fam83F downregulation impairs the DNA damage response, increasing cell proliferation.
• Fam83F overexpression promotes migration in cells with mutant p53.

Conclusions:

• Fam83F is a novel regulator of the DNA damage response by stabilizing p53.
• Fam83F plays a significant role in controlling cell proliferation and survival post-DNA damage.
• Fam83F can modulate the activity of both wild-type and mutant p53, with implications for cancer therapy.