A High Modulus, Multi-Stimuli Responsive, Interwoven Protein Network With Topologically Confined Micro-Association

Area of Science:

• Biomaterials Science
• Protein Engineering
• Polymer Chemistry

Background:

• All-protein materials offer genetic encodability and precise structures but struggle to combine mechanical strength, dynamic adaptability, and functional activity.
• Integrating these properties into a single system remains a significant challenge in materials science.

Purpose of the Study:

• To engineer a multi-stimuli-responsive, self-healing, all-protein-based network with enhanced mechanical properties and tunable characteristics.
• To establish topological proteins as a versatile platform for advanced biomaterial design.

Main Methods:

• Construction of a network using pseudo[2]catenanes with p53dim for entanglement and SpyTag-SpyCatcher for cyclization.
• Triggering network formation via concentration, calmodulin (CaM) binding, or light irradiation.
• Enhancing mechanical properties through tempering-induced micro-association within the topologically confined network.

Main Results:

• Development of a multi-stimuli-responsive, self-healing, all-protein network with an interwoven topology.
• Demonstrated reinforcement of mechanical strength and long-term stability via topologically confined micro-associations.
• Successful application in controlled release and enzyme immobilization, showcasing the material's utility.

Conclusions:

• Topological proteins provide a versatile platform for creating genetically programmable, mechanically tunable, and stimuli-responsive biomaterials.
• The developed network overcomes previous limitations by integrating mechanical strength, dynamic adaptability, and functional activity.