ATP binding controls distinct structural transitions of Escherichia coli DNA gyrase in complex with DNA.

ATP binding controls distinct structural transitions of Escherichia coli DNA gyrase in complex with DNA.
复制标题

DOI:
10.1038/nsmb.2278
复制
发表时间:
2012-04-08
影响因子:
16.8
通讯作者:
Bryant Z
Bryant Z
中科院分区:
生物学1区
文献类型:
--
作者:
Basu A;Schoeffler AJ;Berger JM;Bryant Z

文献摘要

参考文献

被引文献

相似文献

DNA促旋酶是一种利用ATP水解的自由能将负超螺旋引入DNA的分子马达。该反应中的关键步骤是形成与核小体相似规模的手性DNA包裹物。在这里,我们观察旋转酶结构动力学使用单分子测定,其中旋转酶驱动附着在拉伸DNA分子一侧的纳米球的进行性,逐步旋转。旋转暂停和DNA收缩的测量分析揭示了多个ATP调制的结构转变。DNA包裹与ATP酶循环协调,并通过一种意想不到的结构中间体进行,该中间体主导超螺旋的动力学。我们的研究结果揭示了一个构象景观的松散耦合的过渡functioned电机向生产性的能量转导,一个功能,可能是共同的反应周期的其他DNA和蛋白质重塑机器。
DNA gyrase is a molecular motor that harnesses the free energy of ATP hydrolysis to introduce negative supercoils into DNA. A critical step in this reaction is the formation of a chiral DNA wrap on a similar scale to the nucleosome. Here we observe gyrase structural dynamics using a single-molecule assay in which gyrase drives the processive, stepwise rotation of a nanosphere attached to the side of a stretched DNA molecule. Analysis of rotational pauses and measurements of DNA contraction reveal multiple ATP-modulated structural transitions. DNA wrapping is coordinated with the ATPase cycle and proceeds via an unanticipated structural intermediate that dominates the kinetics of supercoiling. Our findings reveal a conformational landscape of loosely coupled transitions funneling the motor toward productive energy transduction, a feature that may be common to the reaction cycles of other DNA and protein remodeling machines.
DOI: 10.1093/nar/gkr680
发表时间: 2011-12
影响因子: 14.9
作者:
Lanz MA;Klostermeier D
通讯作者: Klostermeier D
DOI: 10.1073/pnas.93.25.14416
发表时间: 1996-12-10
影响因子: 11.1
作者:
Kampranis, SC;Maxwell, A
通讯作者: Maxwell, A
DOI: 10.1021/bi952433y
发表时间: 1996-02-06
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Bates, AD;ODea, MH;Gellert, M
通讯作者: Gellert, M
DOI: 10.1016/0092-8674(81)90435-9
发表时间: 1981-01-01
期刊: CELL
影响因子: 64.5
作者:
KIRKEGAARD, K;WANG, JC
通讯作者: WANG, JC
DOI: 10.1021/bi00061a033
发表时间: 1993-03-16
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
ALI, JA;JACKSON, AP;MAXWELL, A
通讯作者: MAXWELL, A