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Revealing the binding properties between resorcinol and DNA.
Guofang Zeng1, Fengping Chen2, Yating Lei2
1College of Chemistry, Nanchang University, Nanchang, Jiangxi, China.
Luminescence : the Journal of Biological and Chemical Luminescence
|September 9, 2021
Summary
Resorcinol, a hair dye ingredient, binds to DNA primarily through electrostatic forces, interacting with the DNA phosphate skeleton. This study elucidates its binding mechanism, offering insights into potential health effects.
Area of Science:
- Biochemistry
- Molecular Biology
- Toxicology
Background:
- Resorcinol is a widely used coupling agent in permanent hair dyes.
- Concerns exist regarding resorcinol's potential health hazards.
- The precise mechanism of resorcinol's interaction with human DNA remains unclear.
Purpose of the Study:
- To investigate the binding properties between resorcinol and calf thymus DNA (ct-DNA).
- To elucidate the action mechanism of resorcinol on DNA at a molecular level.
- To provide data relevant to resorcinol's effects on human health.
Main Methods:
- Spectroscopic techniques (fluorescence quenching, FT-IR).
- Thermodynamic analysis.
- Molecular docking simulations.
- Competitive substitution analysis.
Main Results:
- Resorcinol-DNA binding is a static quenching process driven mainly by electrostatic forces (ΔH < 0, ΔS > 0).
- A binding constant (Kb) of 1.56 × 10^4 M^-1 at 298 K was determined.
- FT-IR and molecular docking confirmed binding to the DNA phosphate skeleton via hydroxyl groups of resorcinol and P-O bonds.
Conclusions:
- Resorcinol binds to the DNA phosphate backbone through electrostatic interactions.
- The study clarifies the molecular mechanism of resorcinol-DNA binding.
- Findings contribute to understanding resorcinol's toxicological profile and potential health implications.
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