Multimodular biocatalysts for natural product assembly.

Area of Science:

• Biochemistry and Molecular Biology
• Natural Product Chemistry
• Synthetic Biology

Background:

• Nonribosomal peptides (NRPs) and polyketides (PKs) are structurally diverse natural products with significant pharmacological activities, including antibiotics and immunosuppressants.
• These compounds are synthesized by large, multimodular enzymes: nonribosomal peptide synthetases (NRPSs) and polyketide synthases (PKSs).
• NRPSs and PKSs share a similar modular architecture and assembly-line mechanism, despite differing substrates.

Purpose of the Study:

• To review the modular organization of NRPSs, PKSs, and hybrid NRPS/PKS systems.
• To explore how the modular and domain structure of these enzymes can be leveraged for rational design.
• To highlight the potential for engineering recombinant enzymes to synthesize novel compounds.

Main Methods:

• Review of existing literature on NRPS and PKS biosynthesis.
• Analysis of the modular architecture and domain functions within NRPS/PKS systems.
• Discussion of strategies for domain and module manipulation in enzyme engineering.

Main Results:

• Detailed examination of the conserved modular structure in NRPS and PKS biosynthesis.
• Identification of key domains and their roles in substrate selection, modification, and product formation.
• Demonstration of the potential for combinatorial biosynthesis through module shuffling.

Conclusions:

• The modular nature of NRPSs and PKSs provides a powerful framework for understanding natural product synthesis.
• Rational engineering of NRPS/PKS modules and domains enables the design of novel biosynthetic pathways.
• This approach facilitates the creation of new chemical entities with potential therapeutic value.