Scientists engineer muscle-inspired protein fibres stronger than natural materials

Researchers at Washington University in St. Louis have created a new type of protein-based fibre inspired by muscle proteins. The breakthrough, led by Fuzhong Zhang, combines synthetic biology with materials science to produce fibres with exceptional strength and flexibility. Funding for the project comes from the United States National Science Foundation.

The team engineered microbial strains to produce custom muscle protein analogues in bioreactors. This method avoids the scalability issues of harvesting proteins from natural sources. It also allows precise adjustments to protein sequences, improving material performance.

The resulting fibres mimic immunoglobulin-like structures found in animal muscles. Tests showed they possess high tensile strength, toughness, and energy absorption, even under extreme conditions. Their shape recovery and resistance to moisture-induced swelling make them particularly durable.

The engineered pathway increases protein yield and consistency, offering a more sustainable and cost-effective production method. Potential applications span medicine, textiles, and agriculture, with plans to evaluate the fibres in activewear and dental implants.

While no commercial products exist yet, the team aims to scale up production. Future uses could include protective clothing, dental implants, and vehicle components.

This research marks a step toward scalable, high-performance biomaterials. The fibres' mechanical properties and adaptability open doors for industries seeking durable, sustainable alternatives. Further testing will determine their viability in real-world applications.