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Construction of a tRNA-embedded-ribozyme trimming plasmid
N Yuyama1, J Ohkawa, Y Inokuchi
1Fermentation Research Institute, Agency of Industrial Science & Technology, MITI, Tsukuba Science City, Japan.
Biochemical and Biophysical Research Communications
|August 14, 1992
Summary
We developed a combined system of tRNA-embedded ribozymes and trimming units. These modified ribozymes show lower activity but enhanced stability, making them useful for tandem applications.
Area of Science:
- Molecular Biology
- Biochemistry
- RNA Therapeutics
Background:
- Ribozymes are catalytic RNA molecules with diverse applications.
- Tandem systems require robust components for efficient function.
- Previous ribozyme designs faced stability challenges in biological environments.
Purpose of the Study:
- To combine tRNA-embedded ribozymes with a 5' and 3' trimming system.
- To evaluate the activity and stability of the combined system.
- To assess the utility of this system for tandem applications.
Main Methods:
- Integration of Cotten and Birnstiel's tRNA-embedded ribozyme technology.
- Incorporation of a novel 5' and 3' RNA trimming system.
- Comparative analysis of modified versus naked ribozyme activity and stability in bovine serum.
Main Results:
- The tRNA-embedded ribozyme system exhibited approximately 30% lower activity compared to naked ribozymes.
- However, the tRNA-embedded ribozymes demonstrated significantly higher stability in bovine serum.
- The combined system showed promise, particularly when the trimming units were concatenated in tandem.
Conclusions:
- Tandem ribozyme systems benefit from enhanced stability provided by tRNA-embedding.
- Despite reduced catalytic activity, tRNA-embedded ribozymes offer a viable strategy for robust RNA-based applications.
- This approach is particularly advantageous for complex, multi-unit RNA constructs.