Stretching instability of intrinsically curved semiflexible biopolymers: A lattice model approach

doi:10.1088/1674-1056/24/2/028701

Abstract We apply a Monte Carlo simulation method to lattice systems to study the effect of an intrinsic curvature on the mechanical property of a semiflexible biopolymer. We find that when the intrinsic curvature is sufficiently large, the extension of a semiflexible biopolymer can undergo a first-order transition at finite temperature. The critical force increases with increasing intrinsic curvature. However, the relationship between the critical force and the bending rigidity is structure-dependent. In a triangle lattice system, when the intrinsic curvature is smaller than a critical value, the critical force increases with the increasing bending rigidity first, and then decreases with the increasing bending rigidity. In a square lattice system, however, the critical force always decreases with the increasing bending rigidity. In contrast, when the intrinsic curvature is greater than the critical value, the larger bending rigidity always results in a larger critical force in both lattice systems.

Keywords: semiflexible biopolymer intrinsic curvature mechanical property phase transition

Received: 10 August 2014
Revised: 16 September 2014
Accepted manuscript online:

PACS:	87.10.Pq	(Elasticity theory)
	36.20.Ey	(Conformation (statistics and dynamics))
	87.15.A-	(Theory, modeling, and computer simulation)
	87.10.Rt	(Monte Carlo simulations)

Fund: Project supported by the Funds from MOST and “National” Center for Theoretical Physics (NCTS).

Corresponding Authors: Zhou Zi-Cong
E-mail: zzhou@mail.tku.edu.tw

Cite this article:

Zhou Zi-Cong (周子聪), Lin Fang-Ting (林方庭), Chen Bo-Han (陈柏翰) Stretching instability of intrinsically curved semiflexible biopolymers: A lattice model approach 2015 Chin. Phys. B 24 028701

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Stretching instability of intrinsically curved semiflexible biopolymers: A lattice model approach

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