Researchers Visualized Nuclease Enzymes Cutting DNA
Scientists at Kanazawa University used atomic force microscopy to observe enzymes breaking down DNA in real time.
Updated on Sept. 25, 2026 in Life Sciences
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Researchers at Kanazawa University have successfully visualized nuclease enzymes interacting with and cleaving DNA molecules in real time. Using high-speed atomic force microscopy, the team identified the specific stages of enzyme-mediated degradation.
Why it matters
This breakthrough addresses long-standing challenges in observing how individual enzyme molecules approach and cut DNA. The study clarifies why certain compacted DNA structures resist enzymatic degradation, providing new insights into genetic protection mechanisms.
The study utilized high-speed atomic force microscopy to track DNA degradation in liquid, focusing on the STORM framework's five stages: Scan, Target, Occupy, Rupture, and Mobilize. DNase I molecules were observed repeatedly visiting restricted DNA regions.
The players
Kanazawa University
This public research university located in Kanazawa, Japan, serves as a leading institution for scientific and medical advancements.
Nano Life Science Institute
The institute serves as the specialized research facility at Kanazawa University where these high-resolution imaging experiments were conducted.
The details
The research team observed that DNase I and micrococcal nuclease enzymes preferentially target exposed DNA ends and bent regions. While protamine condensed DNA into rod-like and toroidal structures that remained resistant to degradation for six minutes, the study confirmed that compact structures become susceptible only after they partially loosen.
Timeline
September 25, 2026: Research findings were published by Kanazawa University.
Deeper Dive
The study validates the STORM conceptual framework, providing a structured map for the five stages of enzyme-mediated DNA degradation. By formalizing this process, the research offers a paradigm shift for observing how enzymes transition from scanning to rupturing genetic material.
This discovery could eventually improve the design of DNA-based therapeutics by teaching scientists how to better control enzyme access. Future gene-delivery systems may utilize these insights to ensure therapeutic genetic material remains protected until it reaches the intended cellular target.
The takeaway
Understanding the physical stages of DNA degradation is critical for engineering more stable gene-based medicines. Researchers can now better predict how different compact DNA shapes protect genetic data from environmental or enzymatic interference.
Further reading
Learn more about advancements in Life Sciences.
More information
Read the complete Nature Communications research publication.
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