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Post-synthetically ligated ribozymes: an alternative approach to iterative solid-phase synthesis
L Bellon1, C T Workman, T C Jarvis
1Department of Oligonucleotide Chemistry, Ribozyme Pharmaceuticals, Inc., Boulder, Colorado 80301, USA. lbellon@rpi.com
Bioconjugate Chemistry
|March 1, 1997
Summary
This study explored a new method for synthesizing ribozymes by linking two halves together after they were made. This approach yielded over 77% amino-linked ribozymes, showing promise for improved synthesis.
Area of Science:
- Biochemistry
- Synthetic Biology
- Molecular Biology
Background:
- Ribozyme synthesis is crucial for various biotechnological applications.
- Improving the yield and efficiency of ribozyme production remains a key challenge.
Purpose of the Study:
- To investigate a convergent synthesis strategy for ribozymes.
- To develop a post-synthetic method for creating amino linkers between ribozyme fragments.
Main Methods:
- Utilized borane.pyridine-mediated reductive amination to couple half-ribozymes.
- Synthesized 3'-phosphoglycaldehyde-5'-half-ribozymes and 5'-aminohexyl-3'-half-ribozymes.
- Performed kinetic analysis of the coupling reaction and evaluated different reducing agents.
Main Results:
- Achieved yields greater than 77% for amino-linked ribozymes using the convergent approach.
- Demonstrated successful ligation on various scales.
- Observed slightly reduced in vitro catalytic activity and cell efficacy in ligated ribozymes.
Conclusions:
- The post-synthetic amino linker formation is an effective strategy for improving overall ribozyme yield.
- While catalytic activity is slightly reduced, this method offers a scalable route to functional ribozymes.