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Related Experiment Video

Updated: Jun 24, 2026

Generation of RNA/DNA Hybrids in Genomic DNA by Transformation using RNA-containing Oligonucleotides

Generation of RNA/DNA Hybrids in Genomic DNA by Transformation using RNA-containing Oligonucleotides

Published on: November 25, 2010

RNA cleavage by a DNA enzyme with extended chemical functionality.

S W Santoro¹, G F Joyce, K Sakthivel

¹Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, USA.

Journal of the American Chemical Society

|September 7, 2001

Summary

This summary is machine-generated.

Researchers developed a small DNA enzyme using in vitro selection. This versatile enzyme efficiently cleaves RNA substrates using essential imidazole groups and Zn2+ catalysis.

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Area of Science:

Biochemistry
Molecular Biology
Synthetic Biology

Background:

DNA enzymes, or deoxyribozymes, offer potential for novel catalytic applications.
Integrating functional groups into nucleic acids is key to expanding their catalytic capabilities.

Purpose of the Study:

To develop a novel DNA enzyme with imidazole functionalities for RNA cleavage.
To engineer a small, versatile, and catalytically efficient nucleic acid enzyme.

Main Methods:

In vitro selection using modified nucleic acid libraries containing imidazole-functionalized deoxyuridine.
Chemical synthesis to define a minimal 12-residue catalytic domain.
Characterization of enzyme kinetics and substrate specificity.

Main Results:

A DNA enzyme with three catalytically essential imidazole groups was successfully developed.
The minimized catalytic domain forms a hairpin structure, displaying imidazole residues for RNA cleavage.
The enzyme demonstrated efficient multiple turnover catalysis (>1 min-1) with Zn2+ and saturation kinetics.
Substrate specificity can be easily altered by modifying substrate-recognition domains.

Conclusions:

A small, versatile DNA enzyme combining nucleic acid recognition with protein-like chemical functionality was created.
This imidazole-containing DNA enzyme represents a significant advancement in nucleic acid enzyme engineering.
The developed DNA enzyme is highly efficient and adaptable for cleaving various RNA sequences.