Omniligase-1-Mediated Phage-Peptide Library Modification and Insulin Engineering

Area of Science:

• Biochemistry
• Molecular Biology
• Protein Engineering

Background:

• Phage display is a powerful tool for protein engineering.
• Current methods have limitations in epitope and scaffold specificity.
• Expanding phage display capabilities is crucial for discovering novel therapeutics.

Purpose of the Study:

• To introduce a novel omniligase-1-mediated ligation technique for phage display.
• To engineer insulin analogues with modified B chain C-terminal regions.
• To assess the biological activity and receptor interactions of engineered insulin analogues.

Main Methods:

• Utilized omniligase-1 for selective and specific ligation on phage pIII protein.
• Applied the method to high-throughput engineering of insulin analogues.
• Performed molecular dynamics studies to analyze insulin analogue interactions.

Main Results:

• Achieved high conversion rates and compatibility with commercial phage libraries.
• Selected insulin analogues with biological activity equivalent to human insulin.
• Discovered a novel interaction between insulin B27 and the insulin receptor L1 domain.

Conclusions:

• Omniligase-1-mediated phage display is effective for engineering disulfide-rich proteins.
• This approach enables the development of novel insulin analogues with therapeutic potential.
• The method shows promise for creating other therapeutic compounds.