Comparative study on the interaction between transferrin and flavonols: Experimental and computational modeling...

Area of Science:

• Biochemistry
• Pharmacology
• Materials Science

Background:

• Transferrin, a key body fluid protein, is investigated as a drug carrier for targeted cancer therapy.
• Flavonols, plant-derived compounds with diverse biological activities, are explored for their interaction with transferrin.

Purpose of the Study:

• To investigate the interaction between specific flavonols (galangin, kaempferol, quercetin, myricetin) and transferrin.
• To elucidate the binding mechanism, affinity, and structural changes induced by flavonols on transferrin.

Main Methods:

• Utilized experimental techniques including fluorescence spectroscopy, UV-vis, and circular dichroism (CD).
• Employed computational approaches such as molecular docking and molecular dynamics simulations.
• Analyzed thermodynamic parameters to understand binding forces.

Main Results:

• Flavonol-transferrin interaction proceeds via static quenching with moderate binding affinity (10^3-10^4 L/mol).
• Binding is driven by enthalpy and entropy, involving hydrophobic, electrostatic, and hydrogen bonding interactions.
• Flavonols induce structural changes in transferrin, including backbone loosening, unfolding, and alterations in secondary structure (increased β-sheet, decreased α-helix/β-turn).
• Molecular docking confirmed specific binding sites, and simulations indicated complex stability.

Conclusions:

• Flavonols interact with transferrin through a combination of forces, leading to significant structural modifications.
• The findings support the potential of transferrin-flavonol interactions for developing novel drug delivery systems.
• Further research into these complexes could optimize targeted drug delivery strategies.