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题名: Elastic property of single double-stranded DNA molecules: Theoretical study and comparison with experiments
作者: Zhou, HJ ;  Zhang, Y ;  Ou-Yang, ZC
刊名: PHYSICAL REVIEW E
出版日期: 2000
卷号: 62, 期号:1, 页码:1045-1058
关键词: SUPERCOILED DNA ;  ENTROPIC ELASTICITY ;  STRETCHING DNA ;  MODEL ;  EXTENSION ;  TOPOISOMERASES ;  FLUCTUATIONS ;  STIFFNESS ;  FILAMENTS ;  MECHANISM
学科分类: Physics
通讯作者: Zhou, HJ , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; State Key Lab Sci & Engn Comp, Beijing 100080, Peoples R China; Tsing Hua Univ, Inst Adv Study, Beijing 100084, Peoples R China
英文摘要: This paper aims at a comprehensive understanding of the novel elastic property of double-stranded DNA (dsDNA) discovered very recently through single-molecule manipulation techniques. A general elastic model for double-stranded biopolymers is proposed, and a structural parameter called the folding angle cp is introduced to characterize their deformations. The mechanical property of long dsDNA molecules is then studied based on this model, where the base-stacking interactions between DNA adjacent nucleotide base pairs, the steric effects of base pairs, and the electrostatic interactions along DNA backbones are taken into account. Quantitative results are obtained by using a path integral method and excellent agreement between theory and the observations reported by five major experimental groups are attained. The strong intensity of the base stacking interactions ensures the structural stability of DNA, while the short-ranged nature of such interactions makes externally stimulated large structural fluctuations possible. The entropic elasticity, highly extensibility, and supercoiling property of DNA are all closely related to this account. The present work also suggests the possibility that negative torque can induce structural transitions in highly extended DNA from the right-handed B form to left-handed configurations similar to the Z-form configuration. Some formulas concerned with the application of path integral methods to polymeric systems are listed in the Appendixes.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000088274200035
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12949
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Zhou, HJ,Zhang, Y,Ou-Yang, ZC. Elastic property of single double-stranded DNA molecules: Theoretical study and comparison with experiments[J]. PHYSICAL REVIEW E,2000,62(1):1045-1058.
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