Traceless Cleavage of Protein-Biotin Conjugates under Biologically Compatible Conditions

Area of Science:

• Biochemistry
• Chemical Biology
• Molecular Biology

Background:

• Biotinylation is crucial for biomolecule conjugation.
• Existing methods result in non-removable labels or leave residual tags, impacting downstream applications.

Purpose of the Study:

• To develop a novel method for traceless and reversible biotinylation.
• To enable mild and biologically compatible conditions for biotinylation and de-biotinylation.

Main Methods:

• Introduction of RevAmines reagents for reversible biotinylation.
• Utilizing a (2-(alkylsulfonyl)ethyl) carbamate linker for controlled cleavage.
• Employing avidin-based capture and mild buffer conditions (200 mM ammonium bicarbonate, pH 8) for release.

Main Results:

• Demonstrated capture and release of biotinylated proteins and peptides.
• Successfully performed fluorescent labeling via reversible biotinylation on cell surfaces.
• Showcased selective enrichment of proteins from bacterial periplasm.

Conclusions:

• RevAmines provide a stable and easily prepared solution for traceless, reversible biotinylation.
• The method regenerates the unmodified amine after capture and release.
• Offers significant potential for proteomics, bio-molecule tagging, and purification.