Reactive carriers of immobilized compounds

Area of Science:

• Polymer Chemistry
• Biomaterials Science
• Bioconjugation Chemistry

Background:

• Macroporous reactive carriers are essential for immobilizing biomolecules like proteins and amino acids.
• Covalent bond formation offers stable immobilization, crucial for applications in biocatalysis and diagnostics.
• The efficiency of immobilization depends on carrier properties and reaction conditions.

Purpose of the Study:

• To synthesize spherical macroporous reactive carriers capable of covalent bonding with amino acids and proteins.
• To investigate the influence of various factors on the efficiency of biomolecule attachment.
• To evaluate the potential of these carriers for enzyme immobilization.

Main Methods:

• Suspension copolymerization of key monomers including 2-hydroxyethyl methacrylate, ethylene dimethacrylate, and p-nitrophenyl esters.
• Incorporation of methacryloyl derivatives of glycine, beta-alanine, and epsilon-aminocaproic acid to create reactive sites.
• Systematic study of parameters such as spacer length, pH, buffer type, reactive group concentration, and ligand concentration.

Main Results:

• Successful preparation of spherical macroporous reactive carriers.
• Demonstrated the attachment of glycine, D,L-phenylalanine, and serum albumin via covalent bonds.
• Identified key factors influencing attachment efficiency, including spacer length and reaction conditions.
• Highlighted the role of hydrolytic and aminolytic reactions of p-nitrophenyl functional groups.

Conclusions:

• Macroporous copolymers with reactive functional groups are effective for immobilizing amino acids and proteins.
• The utility of these carriers for enzyme immobilization is feasible if activity is not hindered by p-nitrophenol byproduct.
• Optimization of reaction conditions and carrier design is critical for maximizing immobilization efficiency.