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the claim

DNA molecules naturally form complex topological knots

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that DNA molecules naturally form complex topological knots?

Yes. Multiple studies demonstrate that DNA molecules naturally form complex topological knots and entanglements due to helical structure, replication, and intracellular processes.

Verdict: SUPPORTED · 5 sources for, 0 against · Last checked

The analysis

The retrieved papers consistently confirm that DNA naturally forms complex knots and entanglements as a byproduct of its double-helical structure, replication, and cellular processing (e.g., papers 0, 2, 4, 5, 11). There are no papers refuting this claim; therefore, the verdict is SUPPORTED.

Evidence for · 5
Condensin minimizes topoisomerase II-mediated entanglements of DNA in vivo.
2021
Condensin minimizes topoisomerase II-mediated entanglements of DNA in vivo, indicating that DNA knots naturally form and must be actively suppressed.
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S, D., J, S., B, M., A, V., & J, R. (2021). Condensin minimizes topoisomerase II-mediated entanglements of DNA in vivo.. doi.org. https://doi.org/10.15252/embj.2020105393

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More for · 4
Closing the DNA replication cycle: from simple circular molecules to supercoiled and knotted DNA catenanes
2019
The helical structure of DNA causes supercoiling, catenation, and knotting to naturally coexist and influence each other during replication.
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Schvartzman, J., Hernández, P., Krimer, D., Dorier, J., & Stasiak, A. (2019). Closing the DNA replication cycle: from simple circular molecules to supercoiled and knotted DNA catenanes. doi.org. https://doi.org/10.1093/nar/gkz586

DNA-Topology Simplification by Topoisomerases.
2021
Knotting and catenation are fundamental topological properties of circular and genomic DNA molecules that present natural challenges to cellular processes.
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A, H., R, Z., & SD, L. (2021). DNA-Topology Simplification by Topoisomerases.. doi.org. https://doi.org/10.3390/molecules26113375

Two convergent pathways of DNA knotting in replicating DNA molecules as revealed by θ-curve analysis.
2018
DNA knots are inadvertently produced during DNA replication in living cells due to the 3D organization and activity of topoisomerases.
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D, O., A, S., & D, B. (2018). Two convergent pathways of DNA knotting in replicating DNA molecules as revealed by θ-curve analysis.. doi.org. https://doi.org/10.1093/nar/gky559

Unzipping of knotted DNA via nanopore translocation.
2025
DNA knots inevitably occur in isolated equilibrated filaments as well as in vivo, affecting processes such as nanopore translocation.
Get citation
A, S. & C, M. (2025). Unzipping of knotted DNA via nanopore translocation.. doi.org. https://doi.org/10.1017/qrd.2024.26

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Receipt History
first checked05 Aug 2026
judged → SUPPORTED · 8505 Aug 2026
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