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Measuring Enzymatic Stability by Isothermal Titration Calorimetry
Published on: March 26, 2019
Study on Formation of Phosvitin-Fructooligosaccharide Complex and Stability Improvement Mechanisms
Anjia Huang1, Jingyi Zhang1, Shujie Chen1
1School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China.
Biomolecules
|June 26, 2026
Summary
Fructooligosaccharides (FOS) improve the stability and functionality of phosvitin (PV) by forming a composite system. This complexation enhances solubility, metal-binding, and antioxidant activity, overcoming PV
Area of Science:
- Food Science
- Biochemistry
- Materials Science
Background:
- Phosvitin (PV) possesses significant metal-chelating and bioactive properties.
- Poor environmental stability limits the practical application of PV.
- Fructooligosaccharides (FOS) are prebiotics with potential stabilizing effects.
Purpose of the Study:
- To investigate the formation and characterization of a PV-FOS composite system.
- To elucidate the interaction mechanism between PV and FOS.
- To evaluate the impact of FOS on PV's structural stability and functional properties.
Main Methods:
- SDS-PAGE and solubility tests to confirm composite formation.
- Molecular docking to predict binding interactions.
- FTIR and Circular Dichroism (CD) for structural analysis.
- Particle size, zeta potential, and turbidity measurements for stability assessment.
- Assessment of solubility, metal-chelating capacity, and antioxidant activity.
Main Results:
- SDS-PAGE and solubility confirmed PV and FOS coexistence.
- Molecular docking indicated non-covalent binding between FOS and PV.
- FTIR and CD showed intermolecular interactions and slight PV structural rearrangement.
- The PV-FOS complex exhibited enhanced turbidity stability and anti-aggregation.
- FOS incorporation significantly improved PV's solubility, metal-chelating capacity, and antioxidant activity across various conditions.
Conclusions:
- Fructooligosaccharides (FOS) effectively complex with phosvitin (PV) through non-covalent interactions.
- The PV-FOS composite demonstrates enhanced structural stability and improved functional properties.
- This composite system offers a promising strategy to overcome PV's application limitations.
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