Directly Quantifiable Biotinylation Using a Water-Soluble Isatoic Anhydride Platform.

Area of Science:

• Bioconjugation Chemistry
• Chemical Biology
• Assay Development

Background:

• Isatoic anhydride (IA) serves as a versatile platform for bioconjugation.
• Quantifiable bioconjugation methods are crucial for various biological applications.
• Existing methods for quantifying biotinylated proteins can be destructive or less sensitive.

Purpose of the Study:

• To develop a water-soluble isatoic anhydride-based platform for quantifiable biotinylation.
• To create biotinylation reagents that allow for nondestructive quantification.
• To compare the efficacy of the new method with traditional assays like HABA.

Main Methods:

• Synthesis of water-soluble isatoic anhydride derivatives functionalized with biotin.
• Utilizing unique absorbance or fluorescence signatures outside the biological window for quantification.
• Preparation of biotinylation reagents with varying linker lengths.
• Demonstration of biotinylated protein quantification and comparison with the HABA assay.

Main Results:

• Successfully elaborated a water-soluble isatoic anhydride-based platform.
• Developed readily quantifiable biotinylation reagents.
• Demonstrated nondestructive quantification of biotinylated proteins.
• Showcased comparable or improved results compared to the traditional HABA assay.

Conclusions:

• The developed isatoic anhydride-based platform provides a robust method for quantifiable bioconjugation.
• This approach enables sensitive and nondestructive quantification of biotinylated biomolecules.
• Offers a valuable alternative to existing biotinylation quantification techniques.