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Inducible nuclear import by TetR aptamer-controlled 3' splice site selection
Adam A Mol1, Marc Vogel1, Beatrix Suess1,2
1Department of Biology, Technical University of Darmstadt, D-64287 Darmstadt, Germany.
RNA (New York, N.Y.)
|November 5, 2020
Summary
Scientists engineered a synthetic genetic device to control protein localization in human cells using alternative splicing. This system allows precise control over nuclear or cytosolic protein placement, offering new research possibilities.
Area of Science:
- Molecular Biology
- Cell Biology
- Synthetic Biology
Background:
- Cellular protein localization is critical for eukaryotic cell function and overall physiology.
- Understanding and controlling protein localization is key to deciphering cellular processes.
Purpose of the Study:
- To develop a synthetic genetic device for inducible control of protein localization (nuclear vs. cytosolic) in human cells.
- To leverage controlled alternative splicing for precise manipulation of protein isoforms.
Main Methods:
- Designed a genetic device incorporating an alternative 3' splice site within a TetR aptamer.
- Utilized doxycycline-inducible TetR repressor binding to control splice site recognition and alternative splicing.
- Fused a nuclear localization sequence to a target protein for proof-of-concept demonstration.
Main Results:
- Successfully demonstrated inducible control of alternative splicing, generating distinct splice isoforms.
- Showcased the ability to direct a cytosolic protein to the nucleus via the synthetic device.
- Validated the system's flexibility for integrating various target sequences and studying protein mislocalization.
Conclusions:
- The developed synthetic genetic device enables precise, doxycycline-inducible control over protein localization through alternative splicing in human cells.
- This tool offers significant potential for studying protein function, mislocalization effects, and the mechanisms of alternative splicing.
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