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A FRET-based ratiometric fluorescent probe to detect cysteine metabolism in mitochondria

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Abstract

As an important biothiol in living cells, cysteine is closely related to oxidative damage in living organisms. Sulfite from cysteine metabolism in living cells plays a crucial role in maintaining homeostasis in an organism, and the unbalance of sulfite in vivo would lead to multiple diseases. Thus the development of a new fluorescent probe for cysteine metabolism is needed urgently in mitochondria which are the main place of cysteine metabolism. Herein we construct a novel targeting mitochondria fluorescent probe CP-K based on the FRET mechanism to visualize sulfite in living MCF-7 cells. Probe CP-K displays a large Stokes shift of 150 nm, a low detection limit (26.3 nM) and “naked eye” detection after the addition of HSO3. Importantly, it is appropriate for imaging the endogenous sulfite from cysteine metabolism in living cells.

Graphical abstract: A FRET-based ratiometric fluorescent probe to detect cysteine metabolism in mitochondria

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Article information


Submitted
01 Jan 2020
Accepted
29 Jan 2020
First published
29 Jan 2020

Org. Biomol. Chem., 2020, Advance Article
Article type
Paper

A FRET-based ratiometric fluorescent probe to detect cysteine metabolism in mitochondria

X. Han, Z. Zhai, X. Yang, D. Zhang, J. Tang, J. Zhu, X. Zhu and Y. Ye, Org. Biomol. Chem., 2020, Advance Article , DOI: 10.1039/D0OB00002G

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