Microdroplet Ultrafast Reactions Speed Antibody Characterization

Area of Science:

• Biochemistry
• Analytical Chemistry
• Chemical Engineering

Background:

• Microdroplet reactions accelerate organic synthesis.
• Protein reactions in microdroplets are underexplored.
• Fast characterization of therapeutic antibodies is crucial.

Purpose of the Study:

• To investigate microdroplet reactions for large proteins.
• To achieve rapid digestion, reduction, and deglycosylation of antibodies.
• To enable faster structural analysis of therapeutic antibodies.

Main Methods:

• Utilized aqueous microdroplets for protein reactions.
• Employed IdeS protease for antibody digestion.
• Incorporated tris(2-carboxyethyl)phosphine for reduction and PNGase F for deglycosylation.
• Analyzed fragments via mass spectrometry.

Main Results:

• Achieved complete IgG1 antibody digestion in 250 microseconds.
• Demonstrated simultaneous digestion and disulfide bond reduction.
• Successfully performed antibody deglycosylation in microdroplets.
• Enabled rapid identification of glycated antibody fragments.

Conclusions:

• Microdroplets serve as efficient microreactors for large-molecule reactions.
• Ultrafast protein modification reactions are feasible in microdroplets.
• This technique significantly accelerates structural analysis of antibodies.