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Long‐Term, Single‐Molecule Imaging of Proteins in Live Cells with Photoregulated Fluxional Fluorophores

Single‐molecule localization microscopy (SMLM) can reveal nanometric details of biological samples, but its high phototoxicity hampers long‐term imaging in live specimens. A significant part of this phototoxicity stems from repeated irradiations that are necessary for controlled switching of fluorop...

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Detalles Bibliográficos
Autores principales: Eördögh, Ádám, Martin, Annabell, Rivera‐Fuentes, Pablo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10092635/
https://www.ncbi.nlm.nih.gov/pubmed/36125781
http://dx.doi.org/10.1002/chem.202202832
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author Eördögh, Ádám
Martin, Annabell
Rivera‐Fuentes, Pablo
author_facet Eördögh, Ádám
Martin, Annabell
Rivera‐Fuentes, Pablo
author_sort Eördögh, Ádám
collection PubMed
description Single‐molecule localization microscopy (SMLM) can reveal nanometric details of biological samples, but its high phototoxicity hampers long‐term imaging in live specimens. A significant part of this phototoxicity stems from repeated irradiations that are necessary for controlled switching of fluorophores to maintain the sparse labeling of the sample. Lower phototoxicity can be obtained using fluorophores that blink spontaneously, but controlling the density of single‐molecule emitters is challenging. We recently developed photoregulated fluxional fluorophores (PFFs) that combine the benefits of spontaneously blinking dyes with photocontrol of emitter density. These dyes, however, were limited to imaging acidic organelles in live cells. Herein, we report a systematic study of PFFs that culminates in probes that are functional at physiological pH and operate at longer wavelengths than their predecessors. Moreover, these probes are compatible with HaloTag labeling, thus enabling timelapse, single‐molecule imaging of specific protein targets for exceptionally long times.
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spelling pubmed-100926352023-04-13 Long‐Term, Single‐Molecule Imaging of Proteins in Live Cells with Photoregulated Fluxional Fluorophores Eördögh, Ádám Martin, Annabell Rivera‐Fuentes, Pablo Chemistry Research Articles Single‐molecule localization microscopy (SMLM) can reveal nanometric details of biological samples, but its high phototoxicity hampers long‐term imaging in live specimens. A significant part of this phototoxicity stems from repeated irradiations that are necessary for controlled switching of fluorophores to maintain the sparse labeling of the sample. Lower phototoxicity can be obtained using fluorophores that blink spontaneously, but controlling the density of single‐molecule emitters is challenging. We recently developed photoregulated fluxional fluorophores (PFFs) that combine the benefits of spontaneously blinking dyes with photocontrol of emitter density. These dyes, however, were limited to imaging acidic organelles in live cells. Herein, we report a systematic study of PFFs that culminates in probes that are functional at physiological pH and operate at longer wavelengths than their predecessors. Moreover, these probes are compatible with HaloTag labeling, thus enabling timelapse, single‐molecule imaging of specific protein targets for exceptionally long times. John Wiley and Sons Inc. 2022-10-27 2022-12-20 /pmc/articles/PMC10092635/ /pubmed/36125781 http://dx.doi.org/10.1002/chem.202202832 Text en © 2022 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Research Articles
Eördögh, Ádám
Martin, Annabell
Rivera‐Fuentes, Pablo
Long‐Term, Single‐Molecule Imaging of Proteins in Live Cells with Photoregulated Fluxional Fluorophores
title Long‐Term, Single‐Molecule Imaging of Proteins in Live Cells with Photoregulated Fluxional Fluorophores
title_full Long‐Term, Single‐Molecule Imaging of Proteins in Live Cells with Photoregulated Fluxional Fluorophores
title_fullStr Long‐Term, Single‐Molecule Imaging of Proteins in Live Cells with Photoregulated Fluxional Fluorophores
title_full_unstemmed Long‐Term, Single‐Molecule Imaging of Proteins in Live Cells with Photoregulated Fluxional Fluorophores
title_short Long‐Term, Single‐Molecule Imaging of Proteins in Live Cells with Photoregulated Fluxional Fluorophores
title_sort long‐term, single‐molecule imaging of proteins in live cells with photoregulated fluxional fluorophores
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10092635/
https://www.ncbi.nlm.nih.gov/pubmed/36125781
http://dx.doi.org/10.1002/chem.202202832
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