“…Second, the functional properties of proteins, including water-binding capacity, emulsification, gelation, and foaming, endow food products with a good sensory appeal, such as a specific texture, flavor, cohesiveness, and elasticity. , Thus, the utilization of proteins in food for nutritional and functional purposes has been given close attention in the past centuries, leading to a boost of various food products. These days, with a deep understanding of protein structure, function, and advantageous properties, shifts have taken place from the nutritional aspect to novel functional biomaterial fabrication for food sector applications, such as highly catalytic protein biomaterials, controllable delivery systems, packing materials, and antimicrobial agents. − So far, great progress has been made by exploiting natural protein biomaterials, − for example, utilization of soybean ferritin cages as vehicles for food bioactive compound encapsulation and delivery, exploitation of natural enzymes for the food industry, and development of antimicrobial peptides for food preservation. ,,− Although natural proteins derived from plants, animals, and microorganisms provide numerous protein biomaterials, it seems that natural protein macromolecules with ideal functions and characteristics are highly limited by their intrinsic physicochemical properties. Moreover, the manufacturing, processing, circulation, and consumption of food are usually accompanied by adverse environments such as high-temperature thermal treatments, which will destroy the structure and functionality of protein materials and limit their wide application.…”