Bending and Base-Stacking Interactions in Double-Stranded Semiflexible Polymer

Details Bending and Base-Stacking Interactions in Double-Stranded Semiflexible Polymer Bending and Base-Stacking Interactions in Double-Stranded Semiflexible Polymer

1998-10-12

arxiv.org/abs/cond-mat/9810132v2

Physics

Condensed Matter

Soft Condensed Matter

8 pages in Revtex format, with 4 EPS figures

Scientific paper

10.1103/PhysRevLett.82.4560

Simple expressions for the bending and the base-stacking energy of double-stranded semiflexible biopolymers (such as DNA and actin) are derived. The distribution of the folding angle between the two strands is obtained by solving a Schr\"{o}dinger equation variationally. Theoretical results based on this model on the extension versus force and extension versus degree of supercoiling relations of DNA chain are in good agreement with the experimental observations of Cluzel {\it et al.} [Science {\bf 271}, 792 (1996)], Smith {\it et al.} [{\it ibid.} {\bf 271}, 795 (1996)], and Strick {\it et al.} [{\it ibid.} {\bf 271}, 1835 (1996)].

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