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Communication

A Bioorthogonal Double Fluorogenic Probe to Visualize Protein–DNA Interaction

1
Chemical Biology Research Group, Institute of Organic Chemistry, ELKH Research Centre for Natural Sciences, Magyar Tudósok Krt 2, 1117 Budapest, Hungary
2
Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter Sétány 1/a, 1117 Budapest, Hungary
*
Authors to whom correspondence should be addressed.
Academic Editor: Bolze Frederic
Chemosensors 2022, 10(1), 37; https://doi.org/10.3390/chemosensors10010037
Received: 17 December 2021 / Revised: 12 January 2022 / Accepted: 13 January 2022 / Published: 17 January 2022
Two sets of bioorthogonally applicable, double fluorogenic probes, capable of sensing DNA–protein interactions, were prepared by installing an azide or tetrazine motif onto structurally fluorogenic, DNA sensitive frames. Installation of these bioorthogonal functions onto DNA intercalating dyes furnished these scaffolds with reactivity based fluorogenicity, rendering these probes double-fluorogenic, AND-type logic switches that require the simultaneous occurrence of a bioorthogonal reaction and interaction with DNA to trigger high intensity fluorescence. The probes were evaluated for double fluorogenic behavior in the presence/absence of DNA and a complementary bioorthogonal function. Our studies revealed that azide and tetrazine appending thiazole orange frames show remarkable double fluorogenic features. One of these probes, a membrane permeable tetrazine modified thiazole orange derivative was further tested in live cell labeling studies. Cells expressing bioorthogonalized DNA-binding proteins showed intensive fluorescence characteristics of the localization of the proteins upon treatment with our double fluorogenic probe. On the contrary, labeling similarly bioorthogonalized cytosolic proteins did not result in the appearance of the fluorescence signal. These studies suggest that such double-fluorogenic probes are indeed capable of sensing DNA–protein interactions in cells. View Full-Text
Keywords: double fluorogenic sensor; thiazole orange; bioorthogonal labeling; DNA intercalator; protein–DNA interaction; confocal imaging; self-labeling tag double fluorogenic sensor; thiazole orange; bioorthogonal labeling; DNA intercalator; protein–DNA interaction; confocal imaging; self-labeling tag
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MDPI and ACS Style

Kormos, A.; Egyed, A.; Olvany, J.M.; Szatmári, Á.; Biró, A.; Csorba, Z.; Kele, P.; Németh, K. A Bioorthogonal Double Fluorogenic Probe to Visualize Protein–DNA Interaction. Chemosensors 2022, 10, 37. https://doi.org/10.3390/chemosensors10010037

AMA Style

Kormos A, Egyed A, Olvany JM, Szatmári Á, Biró A, Csorba Z, Kele P, Németh K. A Bioorthogonal Double Fluorogenic Probe to Visualize Protein–DNA Interaction. Chemosensors. 2022; 10(1):37. https://doi.org/10.3390/chemosensors10010037

Chicago/Turabian Style

Kormos, Attila, Alexandra Egyed, Jasmine M. Olvany, Ágnes Szatmári, Adrienn Biró, Zsóka Csorba, Péter Kele, and Krisztina Németh. 2022. "A Bioorthogonal Double Fluorogenic Probe to Visualize Protein–DNA Interaction" Chemosensors 10, no. 1: 37. https://doi.org/10.3390/chemosensors10010037

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