How the FMR1 Gene Controls Protein Production
Author Information
Author(s): Tara Dobson, Erika Kube, Stephanie Timmerman, Les A. Krushel
Primary Institution: University of Colorado Denver School of Medicine
Hypothesis
The FMR1 5' leader contains an internal ribosomal entry site (IRES) that regulates translation.
Conclusion
The study shows that multiple stimuli influence IRES-dependent translation of the FMR1 mRNA and highlights the role of CGG nucleotide repeats.
Supporting Evidence
- The FMR1 5' leader was shown to contain an IRES through various transfection experiments.
- Inhibiting cap-dependent translation did not affect the expression level of endogenous FMRP.
- Multiple cellular stimuli were found to differentially affect FMR1 IRES activity.
Takeaway
The FMR1 gene has a special part that helps make its protein, and this part can be turned on or off by different signals in the cell.
Methodology
The study used cellular transfection and luciferase assays to test for IRES activity in the FMR1 5' leader.
Limitations
The presence of a cryptic promoter in the FMR1 5' leader may confound the interpretation of results.
Digital Object Identifier (DOI)
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