Organosulfur/Selenium-Based Highly Fluorogenic Molecular Probes for Live-Cell Nucleolus Imaging.

Iswar Chandra Mondal, Maksym Galkin, Shubham Sharma, N Arul Murugan, Dmytro A Yushchenko, Khyati Girdhar, Anirban Karmakar, Prosenjit Mondal, Pankaj Gaur, Subrata Ghosh

Chemistry, an Asian journal 2022 Apr 01

filter terms:

We present fluorogenic cationic organo chalcogens that are highly selective to RNA. We have demonstrated that the conformational dynamics and subsequently the optical properties of these dyes can be controlled to facilitate efficient bioimaging. We report the application of organoselenium and organosulfur-based cell-permeable red-emissive probes bearing a favorable cyclic sidearm for selective and high contrast imaging of cell nucleoli. The probes exhibit high quantum yield upon interacting with RNA in an aqueous solution. An in-depth multiscale simulation study reveals that the prominent rotational freezing of the electron-donating sidearm of the probes in the microenvironment of RNA helps in attaining more planar conformation when compared to DNA. It exerts a greater extent of intramolecular charge transfer and hence leads to enhanced fluorescence emission. A systematic structure-interaction relationship study highlighted the impact of heavy-chalcogens toward the improved emissive properties of the probes. © 2022 Wiley-VCH GmbH.

Citation

Iswar Chandra Mondal, Maksym Galkin, Shubham Sharma, N Arul Murugan, Dmytro A Yushchenko, Khyati Girdhar, Anirban Karmakar, Prosenjit Mondal, Pankaj Gaur, Subrata Ghosh. Organosulfur/Selenium-Based Highly Fluorogenic Molecular Probes for Live-Cell Nucleolus Imaging. Chemistry, an Asian journal. 2022 Apr 01;17(7):e202101281