Minimal genetically encoded tags for fluorescent protein labeling in living neurons

Aleksandra Arsić, Cathleen Hagemann, Nevena Stajković, Timm Schubert and Ivana Nikić-Spiegel ()
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Aleksandra Arsić: University of Tübingen
Cathleen Hagemann: University of Tübingen
Nevena Stajković: University of Tübingen
Timm Schubert: University of Tübingen
Ivana Nikić-Spiegel: University of Tübingen

Nature Communications, 2022, vol. 13, issue 1, 1-18

Abstract: Abstract Modern light microscopy, including super-resolution techniques, has brought about a demand for small labeling tags that bring the fluorophore closer to the target. This challenge can be addressed by labeling unnatural amino acids (UAAs) with bioorthogonal click chemistry. The minimal size of the UAA and the possibility to couple the fluorophores directly to the protein of interest with single-residue precision in living cells make click labeling unique. Here, we establish click labeling in living primary neurons and use it for fixed-cell, live-cell, dual-color pulse–chase, and super-resolution microscopy of neurofilament light chain (NFL). We also show that click labeling can be combined with CRISPR/Cas9 genome engineering for tagging endogenous NFL. Due to its versatile nature and compatibility with advanced multicolor microscopy techniques, we anticipate that click labeling will contribute to novel discoveries in the neurobiology field.

Date: 2022
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DOI: 10.1038/s41467-022-27956-y

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