Development of red-shifted and fluorogenic nucleoside and oligonucleotide diarylethene photoswitches
The reversible modulation of fluorescence signals by light is of high interest for applications in super-resolution microscopy, especially on the DNA level. In this article we describe the systematic variation of the core structure in nucleoside-based diarylethenes (DAEs), in order to generate intri...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
October 19, 2021
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| In: |
Chemistry - a European journal
Year: 2021, Volume: 27, Issue: 69, Pages: 17386-17394 |
| ISSN: | 1521-3765 |
| DOI: | 10.1002/chem.202103133 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1002/chem.202103133 Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.202103133 
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| Author Notes: | Theresa Kolmar, Antonia Becker, Ronja A. Pfretzschner, Alina Lelke, and Andres Jäschke |
| Summary: | The reversible modulation of fluorescence signals by light is of high interest for applications in super-resolution microscopy, especially on the DNA level. In this article we describe the systematic variation of the core structure in nucleoside-based diarylethenes (DAEs), in order to generate intrinsically fluorescent photochromes. The introduction of aromatic bridging units resulted in a bathochromic shift of the visible absorption maximum of the closed-ring form, but caused reduced thermal stability and switching efficiency. The replacement of the thiophene aryl unit by thiazol improved the thermal stability, whereas the introduction of a benzothiophene unit led to inherent and modulatable turn-off fluorescence. This feature was further optimized by introducing a fluorescent indole nucleobase into the DAE core, resulting in an effective photoswitch with a fluorescence quantum yield of 0.0166 and a fluorescence turn-off factor of 3.2. The site-specific incorporation into an oligonucleotide resulted in fluorescence-switchable DNA with high cyclization quantum yields and switching efficiency, which may facilitate future applications. |
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| Item Description: | Gesehen am 27.03.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1521-3765 |
| DOI: | 10.1002/chem.202103133 |