Nonribosomal Peptide Biosynthesis and Engineering Techniques

Nonribosomal peptides are a diverse class of bioactive natural products assembled by large, modular enzymatic complexes known as nonribosomal peptide synthetases (NRPSs). Each NRPS is composed of discrete modules, and each module contains domains responsible for specific catalytic functions: the adenylation (A) domain for monomer selection and activation, the condensation (C) domain for peptide bond formation, the thiolation (T) domain for tethering intermediates, and often a thioesterase (TE) domain for product release. The inherent modularity of these assembly lines underpins strategies to engineer novel peptides with enhanced therapeutic or agricultural properties. Approaches include domain or module swapping, directed evolution of substrate-selecting domains, high-throughput screening of mutated domains, structural redesign of docking interfaces and targeted gene editing. Together, these techniques have transformed NRPS engineering from trial-and-error to increasingly predictable redesign, facilitating the sustainable production of next-generation antibiotics, immunosuppressants and other valuable compounds.

Research from Nature Portfolio

Recent advances have introduced a high-throughput platform for reprogramming the condensation domain, enabling rapid screening of large libraries on the surface of yeast cells. This method has dramatically increased catalytic efficiency for noncanonical substrates by more than forty-fold and offers precision control of enzyme selectivity. Complementary work has demonstrated the use of CRISPR-Cas9 gene editing to reconfigure entire NRPS assembly lines, exchanging subdomains to yield multiple new lipopeptide variants at preparative yields, a stark improvement over conventional recombination methods. In addition, foundational studies have shown that simple substitution of adenylation domains alone can generate novel nonribosomal peptides in high yields, overturning previous assumptions about the necessity of simultaneous condensation domain modifications.

Research from all publishers

Machine-learning approaches have been applied to predict adenylation domain specificity with unprecedented accuracy, using ensemble algorithms and one-hot encoding to classify potential monomers and reveal clusters corresponding to novel amino acids. Bioinformatic pipelines combining feature-based sequence mining with phylogenetic analysis have uncovered an extensive hidden diversity of bacterial siderophores, predicting nearly two hundred distinct structures and associated uptake receptors in a single genus. Evolutionary studies have further elucidated the role of domain recombination as the principal driver of nonribosomal peptide diversity, identifying natural exchange units within adenylation domains and demonstrating that condensation domains act less as strict selectivity filters than previously believed—insights that now guide rational engineering of assembly lines.

Nonribosomal Peptide Biosynthesis and Engineering Techniques publication trend

The graph below shows the total number of articles in nonribosomal peptide biosynthesis and engineering techniques across all publications each year (not limited to Nature Index journals).

Technical terms

Nonribosomal peptide synthetase (NRPS): A large, multi-modular enzyme complex that assembles peptides independently of the ribosome.

Module: A functional unit within an NRPS containing domains that catalyse the incorporation of a single monomer.

Adenylation (A) domain: The domain responsible for selecting and activating amino acid or other monomer substrates.

Condensation (C) domain: The domain that catalyses peptide bond formation between tethered intermediates.

Thiolation (T) domain: Also known as the peptidyl carrier protein domain; it shuttles reaction intermediates between catalytic centres.

Thioesterase (TE) domain: The domain that releases the completed peptide, often through hydrolysis or cyclisation.

Docking domain: A structural motif mediating specific interactions between separate NRPS subunits in a defined order.

References

1. High-throughput reprogramming of an NRPS condensation domain. Nature Chemical Biology (2024).
2. AdenPredictor: accurate prediction of the adenylation domain specificity of nonribosomal peptide biosynthetic gene clusters in microbial genomes. Bioinformatics (2023).
3. Feature sequence-based genome mining uncovers the hidden diversity of bacterial siderophore pathways. eLife (2024).
4. Recent advances in engineering nonribosomal peptide assembly lines. Natural Product Reports (2016).
5. Efficient rational modification of non-ribosomal peptides by adenylation domain substitution. Nature Communications (2020).
6. Structure-based redesign of docking domain interactions modulates the product spectrum of a rhabdopeptide-synthesizing NRPS. Nature Communications (2018).
7. The Landscape of Recombination Events That Create Nonribosomal Peptide Diversity. Molecular Biology and Evolution (2021).
8. Gene editing enables rapid engineering of complex antibiotic assembly lines. Nature Communications (2021).