Feather protein as a support for immobilizing enzymes

Area of Science:

• Biotechnology
• Enzyme Immobilization
• Protein Chemistry

Background:

• Enzyme immobilization is crucial for industrial applications, enhancing stability and reusability.
• Feather meal protein, a byproduct, offers a sustainable and cost-effective matrix for enzyme support.
• Lactase is a key enzyme for lactose hydrolysis in food and pharmaceutical industries.

Purpose of the Study:

• To develop a granular support from feather meal protein for lactase immobilization.
• To evaluate the activity retention and operational stability of immobilized lactase.
• To investigate the kinetic properties and potential limitations of the immobilized enzyme system.

Main Methods:

• Feather meal protein was processed into a granular support.
• Glutaraldehyde was used as a crosslinking agent to immobilize lactase.
• Enzyme activity, retention, and operational stability (half-life) were measured.
• Kinetic data were analyzed to assess diffusional effects.

Main Results:

• The feather meal-based support demonstrated high retention of lactase activity.
• Immobilized lactase exhibited apparent half-lives of 50 to 100 days in column operations.
• Kinetic analysis indicated some diffusional restriction due to the support's gel-like consistency (approx. 90% water content).

Conclusions:

• Feather meal protein is a viable and effective support for lactase immobilization.
• The immobilized lactase system shows excellent operational stability, suitable for continuous processes.
• Further optimization may be needed to overcome diffusional limitations for maximal enzyme efficiency.