Peptide passports: Programmable import fuels novel protein building blocks

Area of Science:

• Biotechnology
• Synthetic Biology
• Protein Engineering

Background:

• Noncanonical amino acids offer unique functionalities for protein applications.
• Current methods for incorporating noncanonical amino acids into proteins are often inefficient and difficult to scale.

Purpose of the Study:

• To engineer a bacterial system for efficient and scalable incorporation of noncanonical amino acids into proteins.
• To overcome the uptake bottleneck of designer amino acids in bacterial hosts.

Main Methods:

• Engineering bacterial strains to transport and incorporate noncanonical amino acids.
• Utilizing peptide cargos to facilitate amino acid uptake.
• Implementing routine culture conditions for scalable production.

Main Results:

• Demonstrated robust and scalable incorporation of designer amino acids into peptide cargos.
• Overcame a significant bottleneck in the uptake of noncanonical amino acids.
• Successfully produced proteins with noncanonical amino acids under standard bacterial culture conditions.

Conclusions:

• The engineered bacterial system provides a viable strategy for the efficient production of proteins containing noncanonical amino acids.
• This advancement facilitates the development of novel protein-based therapeutics and precision tools.