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- W4383303088 abstract "Single-molecule measurements are crucial for studying the interactions between G-quadruplex (GQ) DNA and ligands, as they provide higher resolution and sensitivity compared to those of bulk measurements. In this study, we employed plasmon-enhanced fluorescence to investigate the real-time interaction between the cationic porphyrin ligand TmPyP4 and different topologies of telomeric GQ DNA at the single-molecule level. By analyzing the time traces of the fluorescence bursts, we extracted dwell times for the ligand. For parallel telomeric GQ DNA, the dwell time distribution followed a biexponential fit, yielding mean dwell times of 5.6 and 18.6 ms. For the antiparallel topology of human telomeric GQ DNA, plasmon-enhanced fluorescence of TmPyP4 was observed, with dwell time distributions following a single-exponential fit and a mean dwell time of 5.9 ms. Our approach allows the nuances of GQ-ligand interactions to be captured and holds promise for studying weakly emitting GQ ligands at the single-molecule level." @default.
- W4383303088 created "2023-07-07" @default.
- W4383303088 creator A5012057471 @default.
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- W4383303088 date "2023-07-06" @default.
- W4383303088 modified "2023-10-11" @default.
- W4383303088 title "Use of Single-Molecule Plasmon-Enhanced Fluorescence to Investigate Ligand Binding to G-Quadruplex DNA" @default.
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- W4383303088 doi "https://doi.org/10.1021/acs.jpclett.3c01003" @default.
- W4383303088 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37409750" @default.
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