Theory for the force-stretched double-stranded chain molecule
文献类型：期刊论文
| 作者 | Ou-Yang, ZC ; Liu, F; Dai, LR; Liu, F , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
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| 刊名 | JOURNAL OF CHEMICAL PHYSICS
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| 出版日期 | 2003 |
| 卷号 | 119期号:15页码:8112-8123 |
| 关键词 | Secondary Structure Polymer-molecules Hairpin Formation Dna-molecules Rna Sequence Configuration Denaturation Energy Shape |
| ISSN号 | 0021-9606 |
| 英文摘要 | We modify and extend the recently developed statistical mechanical theory of chain molecules having noncovalent double-stranded conformations, as in RNA or single-stranded DNA, and beta sheets in protein, to the force-stretched case as in a typical single-molecule experiment. The conformations of double-stranded regions of the molecules are calculated based on polymer graph-theoretic approach [S.-J. Chen and K. A. Dill, J. Chem. Phys. 109, 4602 (1998)], while the unpaired single-stranded regions are treated as self-avoiding walks. Two classes of conformations-the hairpin conformations and RNA secondary structures-are explored. For the hairpin conformations, all possible end-to-end distances corresponding to the different types of double-stranded regions are enumerated exactly. For the RNA secondary structures, a recursive formula incorporating the secondary structure and end-to-end distribution has been derived. The sequence dependence and excluded volume interaction are taken into account explicitly. Using the extended theory, we investigate the extension-force and force-extension curves, distribution of the extensions at fixed forces, and reentering phenomenon, respectively. We find that the mechanical behaviors of homogeneous chains of hairpin conformations and secondary structures are quite different: the unfolding of the hairpin case is two state, while the unfolding of the latter is one state. In addition, a reentering transition is observed in hairpin conformations. (C) 2003 American Institute of Physics. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000185703100056 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13203]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Liu, F , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Ou-Yang, ZC,Liu, F,Dai, LR,et al. Theory for the force-stretched double-stranded chain molecule[J]. JOURNAL OF CHEMICAL PHYSICS,2003,119(15):8112-8123. |
| APA | Ou-Yang, ZC,Liu, F,Dai, LR,&Liu, F , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2003).Theory for the force-stretched double-stranded chain molecule.JOURNAL OF CHEMICAL PHYSICS,119(15),8112-8123. |
| MLA | Ou-Yang, ZC,et al."Theory for the force-stretched double-stranded chain molecule".JOURNAL OF CHEMICAL PHYSICS 119.15(2003):8112-8123. |
入库方式： OAI收割
来源：理论物理研究所
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