UAP56 and URH49: RNA Helicases with Nucleocytoplasmic Shuttling Activity
Author Information
Author(s): Thomas Marco Lischka, Peter Müller, Regina Stamminger
Primary Institution: Institute for Clinical and Molecular Virology, University of Erlangen-Nuremberg, Erlangen, Germany
Hypothesis
The study aims to characterize the nucleocytoplasmic shuttling activity of UAP56 and URH49, two DExD/H-box RNA helicases.
Conclusion
UAP56 and URH49 exhibit a CRM1-independent nucleocytoplasmic shuttling activity, suggesting a novel cytoplasmic function for these RNA helicases.
Supporting Evidence
- UAP56 and URH49 are essential for cellular mRNA export.
- Both proteins exhibit nucleocytoplasmic shuttling activity in mammalian cells.
- The shuttling activity of UAP56 and URH49 is CRM1-independent.
- Distinct regions within UAP56 are required for nuclear localization and interaction with REF.
Takeaway
UAP56 and URH49 are proteins that help move RNA in and out of the cell's nucleus, and they can do this without needing a specific helper protein.
Methodology
The study used cotransfection of HeLa cells with expression plasmids and performed heterokaryon assays to analyze the shuttling activity of UAP56 and URH49.
Digital Object Identifier (DOI)
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