Natural Product Biosynthesis in Cyanobacterial Systems

Summary

Cyanobacteria possess remarkable biosynthetic capabilities that give rise to an extensive repertoire of natural products. These organisms employ non-ribosomal peptide synthetases, polyketide synthases and ribosomally synthesised pathways to assemble a wide variety of secondary metabolites, including peptides, polyketides, alkaloids, macrolides and lipopeptides. Biosynthetic gene clusters encode modular enzymes that catalyse sequential condensations, tailoring modifications and unusual cyclisations. Advances in genome and metagenome mining have uncovered cryptic clusters and novel enzyme domains, revealing mechanisms such as trans-acylation, hybrid NRPS-PKS modules and post-assembly glycosylation. Such metabolic diversity underpins ecological functions—defence, signalling and nutrient acquisition—and underlies the discovery of new antibiotics, antifungals, antivirals and anticancer agents. Integration of analytical chemistry, genomics and synthetic biology has enabled heterologous expression, pathway refactoring and precursor supply engineering, enhancing yields and facilitating structural diversification. Understanding regulatory networks and environmental triggers further informs bioprocess optimisation. Beyond drug discovery, these insights support agricultural applications and environmental monitoring of cyanobacterial blooms. As climate change alters cyanobacterial distribution, elucidating their natural product biosynthesis remains crucial for harnessing biotechnological potential and managing ecological risk.

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Natural Product Biosynthesis in Cyanobacterial Systems publication trend

The graph below shows the total number of articles in natural product biosynthesis in cyanobacterial systems across all publications each year (not limited to Nature Index journals).

Technical terms

Biosynthetic gene cluster (BGC): A contiguous set of genes encoding enzymes responsible for the assembly and tailoring of a natural product.

Non-ribosomal peptide synthetase (NRPS): A modular enzyme complex that constructs peptides via thiotemplate-mediated condensation of amino acids independent of the ribosome.

Polyketide synthase (PKS): An enzyme assembly line that synthesises polyketide chains through successive decarboxylative condensations of acyl building blocks.

Secondary metabolites: Low-molecular-weight compounds not directly involved in growth or reproduction but often mediating ecological interactions and bioactivity.

Ribosomally synthesised and post-translationally modified peptides (RiPPs): Peptides initially produced by the ribosome and subsequently modified by specialised enzymes to yield diverse bioactive structures.

References

  1. Cyanobacteria: A Promising Source of Antifungal Metabolites. Marine Drugs (2023).
  2. Four new suomilides isolated from the cyanobacterium Nostoc sp. KVJ20 and proposal of their biosynthetic origin. Frontiers in Microbiology (2023).
  3. Genome Mining of Pseudanabaena galeata CCNP1313 Indicates a New Scope in the Search for Antiproliferative and Antiviral Agents. Microorganisms (2024).

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