High-Throughput Engineering and Modification of Non-Ribosomal Peptide Synthetases Based on Golden Gate Assembly.

Area of Science:

• Biochemistry and Molecular Biology
• Synthetic Biology
• Natural Product Drug Discovery

Background:

• Non-ribosomal peptide synthetases (NRPS) are crucial for producing complex peptides with therapeutic potential.
• Chemical synthesis is often required for modifying natural peptides, posing sustainability challenges.
• In vivo engineering of NRPS offers a sustainable alternative for creating novel peptide structures.

Purpose of the Study:

• To develop a high-throughput method for engineering NRPS using the eXchange Unit Thiolation domain (XUT) concept.
• To create diverse libraries of hybrid NRPS enzymes.
• To generate novel peptide derivatives through targeted modification of existing NRPS systems.

Main Methods:

• Utilized Golden Gate Assembly (GGA) for efficient modular assembly of NRPS fragments.
• Implemented the eXchange Unit Thiolation domain (XUT) concept for NRPS engineering.
• Applied the method to generate NRPS libraries and modify the xenoamicin biosynthetic gene cluster (BGC).

Main Results:

• Successfully generated over 100 novel NRPS enzymes by varying starter, elongation, and termination modules.
• Created 25 novel xenoamicin derivatives through targeted modification of the xabABCD BGC.
• Demonstrated the efficiency and versatility of the GGA-based XUT approach for NRPS engineering.

Conclusions:

• The GGA-based XUT method provides a powerful tool for high-throughput NRPS engineering.
• This approach facilitates the rational design and production of custom peptides and novel drug candidates.
• Enables sustainable in vivo modification of NRPS for pharmaceutical development.