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Selection of functional DNAs which bind to a transition state analog
T Kato1, K Ikebukuro, I Karube
1Research Center for Advanced Science and Technology, University of Tokyo, Japan.
Nucleic Acids Symposium Series
|January 1, 1997
Summary
Researchers selected single-strand DNA (ssDNA) molecules that bind to a transition state analogue (TSA) for carboxyl ester hydrolysis. After nine selection rounds, ssDNA molecules with enhanced affinity for the TSA were successfully enriched.
Area of Science:
- Biochemistry
- Molecular Biology
- Chemical Biology
Background:
- Carboxyl ester hydrolysis is a fundamental chemical reaction.
- Transition state analogues (TSAs) are crucial for understanding reaction mechanisms.
- Developing molecules that specifically interact with TSAs can aid in catalysis and drug design.
Purpose of the Study:
- To demonstrate the selection of single-strand DNA (ssDNA) molecules capable of binding to a TSA of carboxyl ester hydrolysis.
- To enrich ssDNA aptamers with high affinity for the specific TSA.
Main Methods:
- Systematic Evolution of Ligands by Exponential Enrichment (SELEX) was employed.
- Selection rounds involved incubating ssDNA libraries with the TSA.
- ssDNA molecules with binding affinity were isolated and amplified.
Main Results:
- The study successfully demonstrated the selection of ssDNA molecules that bind to the carboxyl ester hydrolysis TSA.
- Significant enrichment of ssDNA molecules with high affinity for the TSA was observed after the 9th round of selection.
Conclusions:
- Single-strand DNA aptamers can be evolved to bind specifically to transition state analogues.
- This approach holds potential for developing novel catalysts or diagnostic tools based on DNA-protein interactions.