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Updated: May 5, 2026
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Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1
Published on: April 16, 2018
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Enhancing microbial metabolic capacity through high-energy electron beam-induced intense structural variations.
Xinyuan Feng1, Zilong Li2, Yifei Zhang3
1Department of Gastroenterology of the Second Affiliated Hospital and Institute of Pharmaceutical Biotechnology, School of Medicine, Zhejiang University, Hangzhou, China.
Nature Communications
|February 19, 2026
Summary
High-energy pulsed electron beams (HEPE) efficiently induce DNA double-strand breaks (DSBs) and structural variants (SVs) in microbes. This method enhances metabolite production and aids in discovering new pharmaceutical compounds.
Area of Science:
- Microbial biotechnology
- Genomics and genetic engineering
- Metabolomics and natural product discovery
Background:
- Small-molecule metabolites are crucial pharmaceutical resources requiring scalable microbial production.
- Efficient genetic variation, particularly structural variants (SVs), is essential for microbial strain improvement but challenging to induce.
- Existing mutagenesis methods struggle to balance DNA double-strand break (DSB) induction with cellular preservation for enhanced metabolite yields.
Purpose of the Study:
- To systematically compare six irradiation technologies for inducing genetic variation in microbial strains.
- To identify a method that efficiently induces DSBs and SVs while maintaining cellular integrity for improved metabolite production.
- To leverage this method for discovering novel secondary metabolites and enhancing yields of known compounds.
Main Methods:
- Systematic comparison of six irradiation technologies in Streptomyces lividans 1326.
- Identification and application of high-energy pulsed electron beams (HEPE) for inducing DSBs and SVs.
- Integration of HEPE with high-throughput metabolomics (HEPE-HiTMS) for metabolite analysis and discovery.
Main Results:
- High-energy pulsed electron beams (HEPE) were identified as an effective method for inducing DSBs and extensive SVs with minimal cytotoxicity.
- HEPE treatment reshaped genome sequences and 3D chromatin structure, leading to activated secondary metabolite production.
- HEPE-HiTMS enabled the discovery of two novel secondary metabolites with unusual C-N linkages and significantly increased yields of clavulanic acid, microcin J25, and lovastatin.
Conclusions:
- HEPE is a powerful tool for inducing SVs with high efficiency and low cytotoxicity, surpassing conventional methods.
- This technology significantly enhances microbial strain development for industrial metabolite production.
- HEPE facilitates cryptic metabolite discovery and accelerates the development of microbial cell factories.
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