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Updated: Jun 10, 2026
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Genome Editing with CompoZr Custom Zinc Finger Nucleases (ZFNs)
Published on: June 14, 2012
Non-FokI-based zinc finger nucleases
Miki Imanishi1, Shigeru Negi, Yukio Sugiura
1Institute for Chemical Research, Kyoto University, Kyoto, Japan.
Methods in Molecular Biology (Clifton, N.J.)
|August 4, 2010
Summary
Researchers engineered zinc finger peptides to cleave DNA without needing other enzymes. These modified peptides maintain their structure and DNA-targeting capabilities, enabling site-specific DNA cleavage with metal ions.
Area of Science:
- Protein engineering
- Biochemistry
- Molecular biology
Background:
- Designing functional proteins with novel catalytic activities is a significant challenge in biochemical research.
- Classical zinc fingers are known for DNA binding but lack inherent catalytic functions.
Purpose of the Study:
- To engineer zinc finger peptides with metal-dependent DNA hydrolytic abilities.
- To achieve site-specific DNA cleavage by modifying zinc finger motifs without additional DNAse domains.
Main Methods:
- Mutating zinc ligands in classical zinc finger structures.
- Introducing a lanthanide ion-binding loop as a linker between zinc finger motifs.
- Testing hydrolytic abilities in the presence of specific metal ions, including cerium.
Main Results:
- Successfully constructed zinc finger peptides with metal-dependent DNA cleavage capabilities.
- The engineered peptides retained their native zinc finger folding and DNA-targeting specificity.
- Achieved site-specific DNA cleavage using cerium ions and the modified zinc finger peptides.
Conclusions:
- The engineered zinc finger peptides demonstrate successful de novo design of catalytic DNA-binding proteins.
- This approach offers a novel strategy for creating targeted DNA cleavage tools without relying on existing DNAse domains.
- The integration of lanthanide ion-binding loops expands the potential for metal-mediated protein functions.
