Patterning Functional Proteins in Ultrabithorax-Based Materials.

Area of Science:

• Biomaterials Science
• Protein Engineering
• Biotechnology

Background:

• Adding bioactivities to biomaterials enables complex functions like cell signaling.
• Patterning these bioactivities within materials is challenging, especially for protein-based systems assembled via coacervation.
• Existing methods like photolithography and 3D printing have limitations for protein material patterning.

Purpose of the Study:

• To develop a method for creating patterned biomaterials using self-assembling proteins.
• To demonstrate the ability to localize multiple bioactivities within a single protein-based material.
• To leverage protein coacervation at the air-water interface for macroscale patterning.

Main Methods:

• Utilized gene fusion to create single polypeptides combining a self-assembling protein (Drosophila melanogaster Ultrabithorax, Ubx) with a functional protein.
• Leveraged the coacervation of protein films at the air-water interface to assemble protein fibers.
• Employed multiple Ubx fusion proteins to introduce and pattern diverse bioactivities.

Main Results:

• Successfully produced functional protein fibers with appended bioactivities.
• Demonstrated the creation of macroscale patterns, including striped, bifunctional-faced, gradient, and core-shell fibers.
• Confirmed that the appended protein functionalities were retained in the final patterned materials.

Conclusions:

• A novel method for patterning biomaterials using self-assembling protein fusions and coacervation has been established.
• This technique enables the creation of complex, multi-functional fibrous materials with spatially controlled bioactivities.
• The developed approach offers a versatile platform for designing advanced protein-based materials for various applications.