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Carbazole Derivatives' Binding to c-KIT G-Quadruplex DNA
Agata Głuszyńska1, Bernard Juskowiak2, Martyna Kuta-Siejkowska3
1Laboratory of Bioanalytical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Umultowska Street 89b, 61-614 Poznań, Poland. aglusz@amu.edu.pl.
Molecules (Basel, Switzerland)
|May 12, 2018
Summary
Three carbazole derivatives effectively stabilize G-quadruplex (GQ) DNA, showing potential for therapeutic applications. Spectroscopic and modeling studies confirm their binding and stabilizing properties on c-KIT 1 DNA.
Area of Science:
- Medicinal Chemistry
- Molecular Biology
- Biophysical Chemistry
Background:
- G-quadruplex (GQ) DNA structures, particularly those in oncogenes like c-KIT 1, are promising therapeutic targets.
- Carbazole derivatives are explored for their potential to interact with and modulate DNA structures.
Purpose of the Study:
- To investigate the binding affinities and stabilizing effects of three carbazole derivatives on a specific c-KIT 1 derived G-quadruplex (GQ) DNA sequence.
- To elucidate the interaction mechanisms using spectroscopic and computational methods.
Main Methods:
- UV-Vis spectrophotometry and fluorescence spectroscopy were employed to study ligand-DNA interactions.
- Circular Dichroism (CD) spectroscopy assessed the structural changes and stabilization of G-quadruplex DNA.
- Molecular modeling provided insights into the binding modes and interactions at the molecular level.
Main Results:
- All three carbazole derivatives demonstrated significant stabilization of the c-KIT 1 derived G-quadruplex DNA.
- Spectrophotometric titrations revealed characteristic spectral shifts upon ligand binding, indicating interaction.
- Ligand binding to G-quadruplex DNA resulted in a notable increase in fluorescence intensity, with binding affinities in the order of 10⁵ M⁻¹.
Conclusions:
- The investigated carbazole derivatives possess G-quadruplex stabilization properties.
- These ligands show potential for targeting and modulating G-quadruplex DNA structures, relevant to oncogene regulation.