A new biomimetic route to engineer enzymatically active mechano-responsive materials

Area of Science:

• Biomaterials Science
• Enzyme Engineering
• Polymer Chemistry

Background:

• Enzymes are crucial biocatalysts, but their activity is often fixed.
• Developing materials that can control or modulate enzyme function is an active research area.
• Mechano-responsive materials offer dynamic control over material properties.

Purpose of the Study:

• To design and characterize novel biocatalytic materials with tunable enzymatic activity.
• To investigate the effect of mechanical stimuli on enzyme function within a material matrix.
• To explore the potential of enzyme conformational changes for creating responsive biomaterials.

Main Methods:

• Covalent immobilization of modified β-galactosidase onto cross-linked polyelectrolyte multilayers (PEM).
• Mechanical stretching of the PEM to induce conformational changes in the enzyme.
• Assays to measure changes in enzymatic activity in response to stretching.

Main Results:

• Catalytically active materials were successfully synthesized using modified β-galactosidase and PEM.
• Enzymatic activity was modulated by mechanical stretching of the polyelectrolyte multilayers.
• Partial reversibility of the enzymatic activity modulation was observed upon release of the mechanical stress.

Conclusions:

• A novel strategy for creating biocatalytic mechano-responsive materials has been established.
• Enzyme conformational changes induced by mechanical force can be harnessed to control biocatalysis.
• This approach provides a new platform for developing smart biomaterials with tunable functions.