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<p>Mechanical impacts on the DNA molecule induce a&#xa0;partial strain energy transfer to the breakage work of hydrogen bonds and stacking interaction between nitrogenous bases. The torsion effect on the DNA molecule provides a&#xa0;nonuniform hydrogen bond breakage in its certain regions. This paper presents mathematical simulation of the potential energy distribution of hydrogen bonds at the external torsion effect on the ATXN2 gene. It is shown that at the normal expansion of the CAG tract, the number of additional breaks does not exceed the critical threshold, which is essential for maintaining the stability of the genetic material. The proposed DNA mathematical model determines the energy parameters of hydrogen bonds, predicts structural changes in the molecule, and identifies potential locations of unstable regions.</p>

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Hydrogen bond breakage in DNA molecules induced by nonuniform energy distribution

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • O. M. Lyasota,
  • G. F. Kopytov,
  • O. A. Leontyeva,
  • A. V. Moiseev,
  • H. L. Hernandez-Caceres,
  • A. A. Dorohova

摘要

Mechanical impacts on the DNA molecule induce a partial strain energy transfer to the breakage work of hydrogen bonds and stacking interaction between nitrogenous bases. The torsion effect on the DNA molecule provides a nonuniform hydrogen bond breakage in its certain regions. This paper presents mathematical simulation of the potential energy distribution of hydrogen bonds at the external torsion effect on the ATXN2 gene. It is shown that at the normal expansion of the CAG tract, the number of additional breaks does not exceed the critical threshold, which is essential for maintaining the stability of the genetic material. The proposed DNA mathematical model determines the energy parameters of hydrogen bonds, predicts structural changes in the molecule, and identifies potential locations of unstable regions.