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Elucidation on the Interaction Between Transferrin and Tetrachlorobisphenol A Based on Multispectroscopic Analysis,
Yuchuan Feng1, Qiumei Zhang1, Xiting Li1
1School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, Jiangxi, China.
Luminescence : the Journal of Biological and Chemical Luminescence
|January 22, 2025
Summary
Tetrachlorobisphenol A (TCBPA), a fire retardant, interacts with transferrin (TF), altering its structure and potentially disrupting iron transport. This binding suggests adverse effects on TF
Area of Science:
- Biochemistry
- Toxicology
- Environmental Science
Background:
- Tetrachlorobisphenol A (TCBPA) is a widely used flame retardant with potential toxic effects and bioaccumulation.
- Transferrin (TF) is a key plasma glycoprotein responsible for iron transport and delivery in the body.
Purpose of the Study:
- To investigate the interaction between TCBPA and TF.
- To elucidate the binding mechanism and its impact on TF structure and function.
Main Methods:
- Multi-spectroscopic techniques (e.g., fluorescence, circular dichroism).
- Molecular docking simulations.
- Thermodynamic analysis (ΔH, ΔS).
Main Results:
- TCBPA binds to TF with a binding constant (Ka) of 2.181 × 10^4 M⁻¹ at 298 K.
- The interaction is driven by van der Waals forces and hydrogen bonds (negative ΔH and ΔS).
- TCBPA binding alters TF secondary structure, decreasing α-helix and increasing β-sheet content.
- Molecular docking shows TCBPA interacting with key residues (Tyr426, Asp392, His585), suggesting interference with iron binding.
Conclusions:
- TCBPA interacts with TF, inducing structural changes.
- The binding may impair TF's ability to transport iron ions in vivo.
- Further attention is needed regarding the adverse effects of TCBPA on TF structure and activity.
