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Deuterated rhodamines for protein labelling in nanoscopy

Rossmann, K.; Akkaya, K. C.; Charbonnier, C.; Eichhorst, J.; Jones, B.; Lehmann, M.; Broichhagen, J.

2020-08-17 physiology
10.1101/2020.08.17.253880 bioRxiv
Show abstract

Rhodamine molecules are setting benchmarks in fluorescence microscopy. Herein, we report the deuterium (d12) congeners of tetramethyl(silicon)rhodamine, obtained by isotopic labelling of the four methyl groups, which improves photophysical (i.e. brightness, lifetimes) and chemical (i.e. bleaching) properties. We explore this finding for SNAP- and Halo-tag labelling, and highlight enhanced properties in several applications, such as Forster resonance energy transfer, fluorescence activated cell sorting, fluorescence lifetime microscopy and stimulated emission depletion nanoscopy. We envision deuteration as a generalizable concept to improve existing and develop new Chemical Biology Probes.

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