Volume 134, Issue 46 e202211767
Forschungsartikel

A Universal Photoactivatable Tag Attached to Fluorophores Enables Their Use for Single-Molecule Imaging

Dr. Xuebo Zhang

Dr. Xuebo Zhang

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

These authors contributed equally to this work.

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Daoming Guan

Daoming Guan

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

These authors contributed equally to this work.

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Yawei Liu

Yawei Liu

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Jinyang Liu

Jinyang Liu

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Kuangshi Sun

Kuangshi Sun

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Song Chen

Song Chen

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Yanxin Zhang

Yanxin Zhang

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Bingjie Zhao

Bingjie Zhao

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Tianli Zhai

Tianli Zhai

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Prof. Yunxiang Zhang

Corresponding Author

Prof. Yunxiang Zhang

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Fuyou LiQian Liu

Corresponding Author

Qian Liu

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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First published: 21 September 2022

Abstract

Single molecule localization microscopy based on photoactivation is a powerful tool for investigating the ultrastructure of cells. We developed a general strategy for photoactivatable fluorophores, using 2,3-dihydro-1,4-oxathiine group (SO) as a tag to attach to various skeletal structures, including coumarin, BODIPY, rhodamine, and cyanine. The conjugation of SO resulted in a significant loss of fluorescence due to photoinduced electron transfer (PeT). Under the irradiation of excitation light, singlet oxygen generated by the fluorophores converted the SO moiety into its ester derivative, terminated the PeT process, and restored the fluorescence. Single molecule localization imaging was achieved using a dual functional illuminating beam in the visible, acting as both the activating and the exciting source. We successfully applied these photoactivatable probes for time-lapse super-resolution tracking in living cells and super-resolution imaging of microtubule structures in neurons.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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