Effect of electroelastic anisotropy of DNA-like molecules on their tertiary structure

V. L. Golo; Yu. M. Evdokimov; E. I. Kats

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Effect of electroelastic anisotropy of DNA-like molecules on their tertiary structure

机译：DNA样分子的电弹性各向异性对其三级结构的影响

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Under certain conditions, mechanical forces can cause an anisotropic molecule like DNA to assume a toroidal spatial structure. A simple model describing such a behavior is suggested. The model incorporates anisotropic elastic energy and external electrical forces. The steady-state structures formed by a macromolecule have been studied numerically using this model. There exist ranges of model parameters, namely, the anisotropy of the elastic tensor, magnitude and orientation of forces, and modulation periods, where molecules have toroidal, spherical, or extended structures. Estimates of parameters characteristic of these structures are consistent with experimental data. In particular, the toroidal structure dimension corresponds to experimental dimensions of toroidal globules produced as a result of so-called PSI condensation of DNA molecules.

机译：在某些条件下，机械力会导致诸如DNA的各向异性分子呈现环形空间结构。建议使用描述这种行为的简单模型。该模型包含各向异性弹性能和外部电力。使用该模型对由高分子形成的稳态结构进行了数值研究。存在模型参数的范围，即，弹性张量的各向异性，力的大小和方向以及调制周期，其中分子具有环形，球形或扩展结构。这些结构特征参数的估计与实验数据一致。特别地，环形结构尺寸对应于由于DNA分子的所谓的PSI缩合而产生的环形球的实验尺寸。

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《Journal of Experimental and Theoretical Physics》 |1997年第6期|共7页
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V. L. Golo; Yu. M. Evdokimov; E. I. Kats;
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Effect of electroelastic anisotropy of DNA-like molecules on their tertiary structure

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