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RNA-binding protein RBM24 regulates p63 expression via mRNA stability
Enshun Xu1, Jin Zhang, Min Zhang
1Comparative Oncology Laboratory, University of California at Davis, Davis, CA 95616. jinzhang@ucdavis.edu.
Molecular Cancer Research : MCR
|December 31, 2013
Summary
RNA-binding protein RBM24 regulates p63 expression by decreasing p63 mRNA stability. This finding reveals a novel posttranscriptional mechanism controlling p63 levels, important for epidermal development and disease.
Area of Science:
- Molecular Biology
- Gene Regulation
- Cancer Biology
Background:
- p63, a p53 family member, is crucial for epidermal development, aging, and tumorigenesis.
- Understanding p63 expression control is vital for biological and clinical applications.
- RBM24 is an RNA-binding protein similar to RBM38, a known p63 regulator.
Purpose of the Study:
- To investigate if RBM24 regulates p63 expression.
- To elucidate the mechanism by which RBM24 affects p63 levels.
Main Methods:
- Ectopic expression and knockdown of RBM24 in cellular models.
- Analysis of p63 transcript and protein levels.
- RNA-binding assays to identify interaction sites between RBM24 and p63 mRNA.
- Functional studies involving p63 3' UTR and RBM24 RNA-binding domain.
Main Results:
- Ectopic RBM24 expression reduced p63 transcript and protein levels.
- RBM24 knockdown increased p63 transcript and protein levels.
- RBM24 binds to the p63 3' untranslated region (UTR).
- RBM24 binding destabilizes p63 mRNA, inhibiting p63 expression.
Conclusions:
- RBM24 is a novel regulator of p63.
- Regulation occurs through destabilization of p63 mRNA via its 3' UTR.
- This highlights the role of posttranscriptional regulation in controlling p63 expression.
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