Biosynthesis and Applications of Antitumor Antibiotics

Antitumor antibiotics comprise a diverse group of natural products produced chiefly by actinomycete bacteria. Their biosynthesis is orchestrated by large, multi-enzyme assemblies that include polyketide synthases and nonribosomal peptide synthetases, often augmented by tailoring enzymes such as glycosyltransferases, oxygenases and methyltransferases. These modular pathways assemble complex molecular frameworks, introduce key functional groups and confer structural diversity essential for DNA intercalation, strand scission or topoisomerase inhibition. Recent advances in genome mining, pathway engineering and synthetic biology have enabled activation of cryptic gene clusters and rational reprogramming of biosynthetic modules, yielding novel analogues with improved potency or altered toxicity profiles. Beyond fundamental insights into enzymatic mechanism, these approaches underpin practical applications in drug discovery, facilitating scalable production of established agents—such as bleomycin, anthracyclines and enediynes—and generation of next-generation derivatives with enhanced tumour selectivity or reduced side effects. Integration of structural biology, metabolic engineering and cell-free platforms continues to expand the chemotherapeutic toolbox, underscoring the global importance of antitumor antibiotics in modern oncology.

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Biosynthesis and Applications of Antitumor Antibiotics publication trend

The graph below shows the total number of articles in biosynthesis and applications of antitumor antibiotics across all publications each year (not limited to Nature Index journals).

Technical terms

Biosynthetic gene cluster: A contiguous set of genes encoding enzymes, regulators and transporters required for the assembly and export of a specific natural product.

Polyketide synthase (PKS): A multifunctional enzyme complex that iteratively condenses acyl-CoA precursors to form poly-β-keto backbones, often in antitumor compound biosynthesis.

Enediyne: A highly strained ring system containing conjugated triple bonds; enediyne antibiotics cleave DNA via radical-mediated mechanisms.

Transcriptional regulator: A DNA-binding protein that activates or represses expression of biosynthetic genes by interacting with promoter regions.

Glycosyltransferase: An enzyme that transfers sugar moieties onto aglycone cores, enhancing solubility and biological activity.

Self-resistance determinant: A protective protein or enzyme in producer organisms that neutralises or exports the antibiotic to prevent autotoxicity.

References

1. In Vivo Manipulation of the Bleomycin Biosynthetic Gene Cluster in Streptomyces verticillus ATCC15003 Revealing New Insights into Its Biosynthetic Pathway*. Journal of Biological Chemistry (2008).
2. Role of sgcR3 in positive regulation of enediyne antibiotic C-1027 production of Streptomyces globisporus C-1027. BMC Microbiology (2009).
3. Catalytic Mechanism of Bleomycin N-Acetyltransferase Proposed on the Basis of Its Crystal Structure*. Journal of Biological Chemistry (2009).