New buffer systems for photopainting of single biomolecules
Literature Information
Publication Date
2023-10-07
DOI
10.1039/D3LF00125C
Impact Factor
0
Authors
Christoph Naderer, Heinrich Krobath, Dmitry Sivun, Georgii Gvindzhiliia, Thomas A. Klar, Jaroslaw Jacak
View Original
Abstract
We present newly developed buffer systems that significantly improve the efficiency of a photochemically induced surface modification at the single molecule level. Buffers with paramagnetic cations and radical oxygen promoting species facilitate laser-assisted protein adsorption by photobleaching (LAPAP) of single fluorescently labelled oligonucleotides or biotin onto multi-photon-lithography-structured 2D and 3D acrylate scaffolds. Single molecule fluorescence microscopy has been used to quantify photopainting efficiency. We identify specific cation interaction sites for members of the cyanine, coumarin and rhodamine classes of fluorophores using quantum mechanical calculations. We show that our buffer systems provide an up to three-fold LAPAP-efficiency increase for the cyanine fluorophore, while keeping excitation parameters constant.
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Recommended Compounds
![N-[(1S,2R,4S)-2-Amino-4-(dimethylcarbamoyl)cyclohexyl]-N'-(5-chloro-2-pyridinyl)ethanediamide structure](https://static.chemtradehub.com/structs/480/480452-37-7-0898.webp "N-[(1S,2R,4S)-2-Amino-4-(dimethylcarbamoyl)cyclohexyl]-N'-(5-chloro-2-pyridinyl)ethanediamide structure")
N-[(1S,2R,4S)-2-Amino-4-(dimethylcarbamoyl)cyclohexyl]-N'-(5-chloro-2-pyridinyl)ethanediamide
CAS Number:
480452-37-7
Molecular Formula:
C16H22ClN5O3
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