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Updated: Jul 18, 2026
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Sequence-specific Labeling of Nucleic Acids and Proteins with Methyltransferases and Cofactor Analogues
Published on: November 22, 2014
Development of fluorescence-labeling method for methylcytosine with metal complexation
Kazuo Tanaka1, Kazuki Tainaka, Taku Kamei
1Frontier Research System, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Nucleic Acids Symposium Series (2004)
|December 8, 2006
Summary
We developed a new method for methylcytosine-selective fluorescence labeling using an osmium ligand. This technique allows easy incorporation of various fluorophores for advanced epigenetic research.
Area of Science:
- Chemical Biology
- Epigenetics
- Organic Synthesis
Background:
- Methylcytosine is a key epigenetic marker.
- Selective labeling of methylcytosine is crucial for studying its biological roles.
- Existing methods may lack specificity or ease of use.
Purpose of the Study:
- To develop a novel method for methylcytosine-selective fluorescence labeling.
- To enable facile incorporation of diverse fluorophores at the methylcytosine site.
Main Methods:
- Synthesis of an amino-modified bipyridine as an osmium ligand.
- Utilizing the ligand for methylcytosine-selective oxidation.
- Incorporation of fluorophores via amide formation after osmium complexation.
Main Results:
- Successful preparation of the amino-modified bipyridine osmium ligand.
- Demonstration of methylcytosine-selective oxidation.
- Efficient and versatile incorporation of different fluorophores.
Conclusions:
- The developed method provides a selective and adaptable approach for methylcytosine fluorescence labeling.
- This technique facilitates the study of epigenetic modifications.
- It offers a valuable tool for chemical biology and epigenetics research.
