Molecularly Imprinted Membranes: From Protein Recognition to Refolding Activity

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Biotechnology

Background:

• Molecular imprinting enables synthetic materials to recognize specific biomolecules.
• Poly (ethylene-co-vinyl alcohol) (EVAL) is a versatile polymer for membrane fabrication.
• Selective protein recognition is crucial for diagnostics and therapeutics.

Purpose of the Study:

• To develop molecularly imprinted (MIM) membranes using EVAL for selective protein recognition.
• To investigate the conformational modulation capabilities of these imprinted membranes.
• To use α-amylase as a model template for imprinting and recognition studies.

Main Methods:

• Membrane fabrication via phase inversion.
• Template (α-amylase) extraction and characterization using UV-Vis spectroscopy and SEM.
• Surface analysis using FTIR-ATR and chemical imaging.
• Protein rebinding studies and selectivity tests with bovine serum albumin.
• Enzymatic activity assays to assess protein function.

Main Results:

• Successful fabrication of porous EVAL membranes with effective α-amylase template removal.
• Demonstrated concentration-dependent rebinding of α-amylase with saturation kinetics.
• Selective recognition of α-amylase over bovine serum albumin.
• Partial recovery of catalytic activity in re-bound, thermally denatured α-amylase, suggesting conformational reorganization.

Conclusions:

• EVAL-based molecularly imprinted membranes show high selectivity for α-amylase.
• The imprinted cavities can influence protein conformation and potentially restore function.
• These biomimetic platforms hold promise for advanced protein recognition and modulation applications.