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Unscrambling fluorophore blinking for comprehensive cluster detection via photoactivated localization microscopy

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Item Type:Article
Title:Unscrambling fluorophore blinking for comprehensive cluster detection via photoactivated localization microscopy
Creators Name:Platzer, R., Rossboth, B.K., Schneider, M.C., Sevcsik, E., Baumgart, F., Stockinger, H., Schütz, G.J., Huppa, J.B. and Brameshuber, M.
Abstract:Determining nanoscale protein distribution via Photoactivated Localization Microscopy (PALM) mandates precise knowledge of the applied fluorophore's blinking properties to counteract overcounting artifacts that distort the resulting biomolecular distributions. Here, we present a readily applicable methodology to determine, optimize and quantitatively account for the blinking behavior of any PALM-compatible fluorophore. Using a custom-designed platform, we reveal complex blinking of two photoswitchable fluorescence proteins (PS-CFP2 and mEOS3.2) and two photoactivatable organic fluorophores (PA Janelia Fluor 549 and Abberior CAGE 635) with blinking cycles on time scales of several seconds. Incorporating such detailed information in our simulation-based analysis package allows for robust evaluation of molecular clustering based on individually recorded single molecule localization maps.
Keywords:Fluorescence Imaging, Molecular Biophysics, Nanoscale Biophysics, Single-Molecule Biophysics
Source:Nature Communications
ISSN:2041-1723
Publisher:Nature Publishing Group
Volume:11
Number:1
Page Range:4993
Date:5 October 2020
Official Publication:https://doi.org/10.1038/s41467-020-18726-9
PubMed:View item in PubMed

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