Exploring non-covalent interactions of β-casein with six polyphenols

Area of Science:

• Food Science and Technology
• Biochemistry
• Nutraceuticals

Background:

• Beta-casein serves as a valuable delivery system for polyphenols, preserving their bioactivity.
• Optimal polyphenol-beta-casein ratios and interaction factors require further elucidation for effective application.

Purpose of the Study:

• To investigate the impact of structural, physical, and chemical properties of six fruit-derived polyphenols on their interaction with beta-casein.
• To determine optimal molar concentration ratios for polyphenol-beta-casein complexes using multi-spectroscopy.

Main Methods:

• Correlation analysis was employed to link polyphenol properties with beta-casein interactions.
• Multi-spectroscopy techniques were utilized for optimal molar ratio evaluation.
• Analysis included molecular weight, hydroxyl group count, hydrophobicity, and charge of six different polyphenols.

Main Results:

• Quenching efficiency was positively correlated with the ratio of polyphenol molecular weight to its number of hydroxyl groups.
• Flavonoid interactions with beta-casein were enhanced by hydrophobicity, while phenolic acid interactions were negatively affected by charge.
• The optimal molar ratio for polyphenol to beta-casein was determined to be 20:40 or lower.

Conclusions:

• Understanding milk protein-polyphenol interactions is crucial for optimizing delivery systems.
• These findings facilitate cost-effective applications of polyphenols in the food and pharmaceutical industries.
• Specific polyphenol characteristics significantly influence their binding affinity and efficacy with beta-casein.