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Updated: Oct 13, 2025
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Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
Published on: February 7, 2022
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Synthesis and Functionality Study of Photoswitchable Hydrazone Oligodeoxynucleotides.
Zhihua Chang1, Song Mao1, Ya Ying Zheng1
1Department of Chemistry and The RNA Institute, University at Albany, State University of New York, Albany, New York.
Current Protocols
|November 18, 2021
Summary
Researchers developed a new photoswitchable DNA building block, hydrazone phosphoramidite. This functional nucleotide can be incorporated into DNA for light-controlled applications, regulating DNA-enzyme interactions and synthesis using blue light.
Area of Science:
- Chemical Synthesis
- Oligonucleotide Chemistry
- Molecular Biology
Background:
- The development of functional nucleic acids is crucial for advanced molecular technologies.
- Existing DNA building blocks lack light-responsive properties for dynamic control.
Purpose of the Study:
- To synthesize and characterize a novel photoswitchable hydrazone phosphoramidite building block.
- To demonstrate its incorporation into oligodeoxynucleotides using standard solid-phase synthesis.
- To evaluate its utility in light-regulated DNA applications.
Main Methods:
- Chemical synthesis of hydrazone phosphoramidite from deoxyuridine.
- Appel reaction for installing the hydrazone group.
- Solid-phase synthesis of oligodeoxynucleotides using amidite chemistry.
- Primer extension assays for functionality studies.
Main Results:
- Successful synthesis and characterization of the photoswitchable hydrazone phosphoramidite.
- Demonstrated compatibility with conventional phosphoramidite chemistry for DNA synthesis.
- Oligodeoxynucleotides containing the hydrazone photoswitch were successfully prepared and purified.
- Functionality studies confirmed the potential for light-mediated regulation.
Conclusions:
- A novel, photoswitchable DNA building block, hydrazone phosphoramidite, has been developed.
- This building block enables the creation of functional DNA with light-responsive properties.
- The method expands the available nucleotide pool for diverse applications in molecular biology and nanotechnology.
