Engineered protein G variants for multifunctional antibody-based assemblies.

Area of Science:

• Biotechnology
• Molecular Biology
• Immunology

Background:

• Traditional antibody engineering is time-consuming and complex.
• Need for versatile and rapidly customizable antibody-based tools for research.

Purpose of the Study:

• To develop a modular, plug-and-play platform for rapid assembly of multifunctional antibody reagents.
• To demonstrate the utility of this platform for multiplexed antigen detection, IgG-like assemblies, and bispecific T-cell engagers.

Main Methods:

• Engineering of antibody Fab scaffolds and Protein G (PG) variants using phage display for high specificity.
• Development of a modular system for creating IgG-like and bispecific antibody assemblies.
• Application of the system for multiplexed antigen detection and bispecific T-cell engager (BiTE) fabrication.

Main Results:

• Demonstrated successful creation of prefabricated antibody modules that snap together.
• Showcased multiplexed antigen detection using PG-SNAP-tag fusions.
• Produced customized IgG-like and bispecific antibodies rapidly from bulk modules.
• Validated the efficacy of BiTEs derived from the platform in cancer cell-killing assays.

Conclusions:

• The developed plug-and-play antibody platform offers a user-friendly and versatile solution for creating customized antibody reagents.
• This system significantly reduces the time and effort required for antibody-based tool development.
• The platform has broad applicability in cell biology research, diagnostics, and therapeutic development.