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Published on: July 5, 2024
Photoswitchable Oligonucleotides Containing Different Diarylethene-Modified Nucleotides
Christopher Sarter1, Surjendu Dey1, Andres Jäschke1
1Institut für Pharmazie und Molekulare Biotechnologie, Universität Heidelberg, 69120 Heidelberg, Germany.
Researchers created photoresponsive DNA using diarylethene photoswitches. These DNA strands can be switched on and off with light, offering new possibilities for molecular devices.
Area of Science:
- Organic Chemistry
- Molecular Biology
- Materials Science
Background:
- Diarylethenes are known photoswitches, often conjugated with other molecules.
- Previous work integrated nucleobases into diarylethene structures for photoresponsive systems.
Purpose of the Study:
- To synthesize diarylethene-deoxyuridine phosphoramidites.
- To incorporate these into oligodeoxynucleotides for site-specific photoresponsiveness.
- To characterize the resulting photochromic DNA.
Main Methods:
- Solid-phase synthesis of oligodeoxynucleotides.
- Incorporation of diarylethene-deoxyuridine phosphoramidites.
- UV irradiation and spectroscopic analysis.
Main Results:
- Successful synthesis of various DNA sequences with single or multiple diarylethene units.
- Formation of colored closed-ring isomers upon UV irradiation.
- Additive absorption spectra when different diarylethenes are combined.
- Demonstrated thermostability and photoreversibility of the modified DNA.
Conclusions:
- Diarylethene-deoxyuridine phosphoramidites can be effectively incorporated into DNA.
- Photochromic DNA oligonucleotides exhibit tunable optical properties.
- These modified DNA strands are stable and can be reversibly switched by light.
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