A new application of molecularly imprinted materials

Area of Science:

• Biocatalysis
• Enzyme Engineering
• Materials Science

Background:

• Enzymatic reactions often face unfavorable thermodynamic equilibria, limiting product yield.
• Aspartame (Z-L-Asp-L-Phe-OMe) synthesis is a commercially important enzymatic process.
• Efficient product removal is key to overcoming equilibrium limitations.

Purpose of the Study:

• To investigate the use of specific adsorbents to shift enzymatic equilibrium towards product formation.
• To enhance the yield of the enzymatic synthesis of aspartame.
• To explore the potential of molecular imprinting for creating tailored adsorbents for enzymatic processes.

Main Methods:

• Preparation of highly stable and specific adsorbents using molecular imprinting.
• Utilizing these adsorbents to selectively bind the product, Z-aspartame.
• Conducting the enzymatic condensation reaction in the presence of the adsorbents.

Main Results:

• A significant increase of 40% in product yield was achieved.
• The adsorbents demonstrated high specificity and stability for Z-aspartame.
• The method effectively shifted the unfavorable enzymatic equilibrium.

Conclusions:

• Specific, sterilizable adsorbents are a viable strategy to increase yields in enzymatic processes.
• Molecular imprinting offers a powerful technique for designing custom adsorbents.
• Direct product isolation via adsorbent retrieval is a promising application, especially with magnetic adsorbents.