Fast Generation of F(Ab')₂ Fragments From Human IgG Using Fc-Fused IgG-Degrading Enzyme.

Area of Science:

• Biochemistry
• Protein Engineering
• Immunology

Background:

• Human immunoglobulin G (IgG) and Fc-fusion proteins are crucial in therapeutics and research.
• Fc-fragment removal is essential for specific applications, requiring efficient and clean purification methods.

Purpose of the Study:

• To develop and validate a streamlined method for the selective removal of Fc-fragments from human IgG and Fc-fusion proteins.
• To ensure the integrity and purity of the resulting F(ab’)2 fragments or Fc-free proteins.

Main Methods:

• Incubation of IgG or Fc-fusion proteins with IdeS-Fc enzyme.
• Affinity retention of Fc-fragments using protein G agarose beads.
• Collection of F(ab’)2 fragments or Fc-free proteins via centrifugation in the original buffer.

Main Results:

• Successful and efficient cleavage of Fc-fragments from human IgG and Fc-fusion proteins.
• Effective retention of cleaved Fc-fragments by protein G agarose beads.
• High purity of F(ab’)2 fragments or Fc-free proteins obtained without IdeS enzyme contamination.

Conclusions:

• The described method provides a robust and efficient approach for Fc-fragment removal.
• This technique yields high-purity F(ab’)2 fragments or Fc-free proteins suitable for downstream applications.
• The process is simple, scalable, and avoids contamination, making it valuable for protein engineering and therapeutic development.