Affiliation:
1. Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering China Agricultural University Beijing 100083 China
2. Air Force Medical Center PLA Beijing 100142 China
Abstract
SummaryVitamin A (VA) is a fat‐soluble compound that is essential for physiological functions including vision, fetal growth, immune response, cell differentiation and proliferation. However, its susceptibility to environmental conditions leading to poor stability limits its application in food. This study investigated the interaction between egg white protein (EWP) and VA by spectroscopy and molecular docking. The results indicated one EWP could bind 16.00 ± 0.89 VA molecules and the binding constant is (2.59 ± 0.71) × 105 m−1. What's more, there was a fluorescence resonance energy transfer between EWP and VA, and the Förster radius is 5.28 nm. In addition, VA enhanced the hydrophobic interactions with the EWP, resulting in protein aggregation, larger average particle size and more uniform particle size distribution. Finally, the combination of VA with EWP could significantly improve the photothermal stability and storage stability of VA. These studies indicate that EWP nanocomplexes can be used as ideal delivery carriers for bioactive substances.