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Writhe of DNA induced by a terminal twist

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An Erratum to this article was published on 01 September 2005

Abstract

This paper considers the three-dimensional structure of B-form DNA. The molecule may be open or covalently closed. For the former, its two ends are not allowed to move or rotate freely in space unless the molecule is under the influence of rigid body motions of the ambient space. Implied by the elastic rod model for DNA, the molecule writhes immediately when subject to a terminal twist as long as its axis is none of the following curves: lines, circular arcs, circular helices. This result is remarkably different from well-known results about DNA of other conformations. For example, if a DNA is regarded as an elastic rod whose axis is a circle, then it has no induced writhe when subject to a terminal twist until the latter meets a critical extent.

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Authors and Affiliations

  1. Department of Applied Mathematics, National Dong Hwa University, Shoufeng, Hualien, 97441, Taiwan, Province of China

    Kai Hu

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  1. Kai Hu
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To my mother for her 70th birthday

An erratum to this article is available at http://dx.doi.org/10.1016/j.bulm.2005.06.002.

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Hu, K. Writhe of DNA induced by a terminal twist. Bull. Math. Biol. 67, 197–209 (2005). https://doi.org/10.1016/j.bulm.2004.05.008

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  • DOI: https://doi.org/10.1016/j.bulm.2004.05.008

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