Rapid internal contraction boosts DNA friction.

Rapid internal contraction boosts DNA friction.
复制标题

DOI:
10.1038/ncomms2790
复制
发表时间:
2013
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

宏观物体通常用力来操纵,用光来观察。然而,在纳米尺度上,这通常是相反的:单个大分子被光操纵并用力监测。这一过程是单分子力谱的基础,使我们在很大程度上定量地了解了DNA的工作原理,现在通常用于探索分子结构和相互作用、DNA-蛋白质反应和蛋白质折叠。在这里,我们通过引入动态力光谱装置进一步发展了这项技术,该装置用于非侵入性地检查紧绷的DNA链中的张力动态。分子突然释放后的内部收缩引起了粘性摩擦的急剧增加,如附着的胶体示踪剂的缓慢松弛所揭示的那样。我们的系统理论对数据进行了定量的解释,为合理设计新的动态力谱分析方法提供了有力的工具。单分子力谱提供了有关大分子性质的有用的定量信息。Otto和他的同事非侵入性地检查了紧绷的DNA链中的张力动力学,从而将单分子力谱的使用扩展到了大分子动力学的研究中。
Macroscopic objects are usually manipulated by force and observed with light. On the nanoscale, however, this is often done oppositely: individual macromolecules are manipulated by light and monitored with force. This procedure, which is the basis of single-molecule force spectroscopy, has led to much of our quantitative understanding of how DNA works, and is now routinely applied to explore molecular structure and interactions, DNA–protein reactions and protein folding. Here we develop the technique further by introducing a dynamic force spectroscopy set-up for a non-invasive inspection of the tension dynamics in a taut strand of DNA. The internal contraction after a sudden release of the molecule is shown to give rise to a drastically enhanced viscous friction, as revealed by the slow relaxation of an attached colloidal tracer. Our systematic theory explains the data quantitatively and provides a powerful tool for the rational design of new dynamic force spectroscopy assays. Single-molecule force spectroscopy provides useful quantitative information about the properties of macromolecules. Otto and colleagues non-invasively inspect the tension dynamics in a taut strand of DNA, thereby extending the use of single-molecule force spectroscopy to the study of macromolecular dynamics.
DOI: 10.1038/nature01405
发表时间: 2003-01-23
期刊: NATURE
影响因子: 64.8
作者:
Bustamante, C;Bryant, Z;Smith, SB
通讯作者: Smith, SB
DOI: 10.1073/pnas.0700333104
发表时间: 2007-07-17
影响因子: 11.1
作者:
Crut, Aurlien;Koster, Daniel A.;Dekker, Nynke H.
通讯作者: Dekker, Nynke H.
DOI: 10.1103/physreve.71.061920
发表时间: 2005-06-01
期刊: PHYSICAL REVIEW E
影响因子: 2.4
作者:
Goshen, E;Zhao, WZ;Feingold, M
通讯作者: Feingold, M
DOI: 10.1103/physrevlett.94.077804
发表时间: 2005-02-25
影响因子: 8.6
作者:
Hallatschek, O;Frey, E;Kroy, K
通讯作者: Kroy, K
DOI: 10.1122/1.1626679
发表时间: 2004-01-01
影响因子: 3.3
作者:
Shaqfeh, ESG;McKinley, GH;Sridhar, T
通讯作者: Sridhar, T