Antibodies with infinite affinity

Area of Science:

• Biochemistry
• Chemical Biology
• Molecular Engineering

Background:

• Avidin/biotin systems are widely used for molecular detection but can dissociate.
• Achieving high functional affinity is crucial for sensitive biological assays.
• Existing antibody/ligand systems often face limitations in binding stability.

Purpose of the Study:

• To engineer antibody/ligand pairs with enhanced functional affinity surpassing avidin/biotin.
• To develop a method for creating non-dissociating antibody/ligand complexes.
• To demonstrate the chemical principles for manipulating binding affinity.

Main Methods:

• Utilized fundamental chemical principles to design antibody/ligand pairs.
• Engineered complementary reactive groups into antibody binding pockets and ligands.
• Ensured low reactivity of engineered groups with external molecules.
• Facilitated high local concentrations of reactive groups within the complex for covalent linkage.

Main Results:

• Developed antibody/ligand pairs that retain antibody specificity.
• Achieved elimination of ligand dissociation from the antibody.
• Created antibody/ligand complexes with functionally infinite affinity.
• Demonstrated applicability to other biological binding pairs.

Conclusions:

• A novel approach for producing antibody/ligand pairs with non-dissociating characteristics was developed.
• Chemical manipulation of affinity through engineered covalent linkage offers a powerful tool.
• This method significantly enhances binding stability, surpassing traditional systems like avidin/biotin.