Which model based on fluorescence quenching is suitable to study the interaction between trans-resveratrol and BSA?

Area of Science:

• Biochemistry
• Molecular interactions
• Spectroscopy

Background:

• Fluorescence quenching is used to determine binding parameters between molecules.
• Different models yield varying binding parameters when analyzing BSA-tryptophan fluorescence quenching.
• The suitability of these models for specific interactions, like trans-resveratrol with BSA, requires investigation.

Purpose of the Study:

• To compare twelve fluorescence quenching models for determining binding parameters.
• To identify the most suitable model for studying the interaction between trans-resveratrol and bovine serum albumin (BSA).
• To establish a reliable method for analyzing polyphenol-protein interactions.

Main Methods:

• Utilizing fluorescence spectroscopy to monitor BSA's intrinsic fluorescence.
• Applying twelve different theoretical models to analyze fluorescence quenching data.
• Investigating the interaction of BSA with trans-resveratrol and eleven other flavonoids.
• Performing double logarithm regression analysis.

Main Results:

• Binding parameters varied significantly across the twelve models.
• A trend of increasing binding sites with increasing binding constants was observed for similar compounds.
• The double logarithm regression model demonstrated suitability for analyzing polyphenol binding to BSA, as exemplified by the flavonoid studies.

Conclusions:

• The choice of fluorescence quenching model significantly impacts the determined binding parameters.
• The double logarithm regression model provides a reliable approach for studying polyphenol-BSA interactions.
• This study offers a framework for selecting appropriate models in biochemical binding studies.