Sequence-specific B-DNA flexibility modulates Z-DNA formation.

Sequence-specific B-DNA flexibility modulates Z-DNA formation.
复制标题

DOI:
10.1021/ja1073068
复制
发表时间:
2011-02-23
影响因子:
15
通讯作者:
Al-Hashimi HM
Al-Hashimi HM
中科院分区:
化学1区
文献类型:
--
作者:
Bothe JR;Lowenhaupt K;Al-Hashimi HM

文献摘要

参考文献

被引文献

相似文献

右手B-DNA向左手Z-DNA的转化是生物学中最大的结构转变之一,在基因表达和调控中起着重要作用。Z-DNA片段必须在被大量B-DNA包围的基因组内形成,并且需要产生能量昂贵的B/Z连接。在这里,我们使用天然丰度NMR R1 ρ碳弛豫测量和CD光谱的组合,序列特异性B-DNA的灵活性调节热力学倾向,形成Z-DNA和B/Z结的位置。我们观察到B-DNA在快速(ps-ns)和慢速(µ sms)时间尺度上的序列特异性灵活性,这些时间尺度定位于B/Z结形成的位点。此外,我们的研究表明,CG-重复序列在调节这种内在的B-DNA柔性方面发挥着积极的作用。综上所述,我们的研究结果表明,序列特异性B-DNA的灵活性可能提供了一种机制,用于定义基因组中Z-DNA的长度和位置。
Conversion of right-handed B-DNA into left-handed Z-DNA is one of the largest structural transitions in biology that plays fundamental roles in gene expression and regulation. Z-DNA segments must form within genomes surrounded by a sea of B-DNA and require creation of energetically costly B/Z junctions. Here, we show using a combination of natural abundance NMR R1ρ carbon relaxation measurements and CD spectroscopy that sequence-specific B-DNA flexibility modulates the thermodynamic propensity to form Z-DNA and the location of B/Z junctions. We observe sequence-specific flexibility in B-DNA spanning fast (ps-ns) and slow (µsms) timescales localized at the site of B/Z junction formation. Further, our studies show that CG-repeats play an active role tuning this intrinsic B-DNA flexibility. Taken together, our results suggest that sequence-specific B-DNA flexibility may provide a mechanism for defining the length and location of Z-DNA in genomes.
DOI: 10.1021/bi0103260
发表时间: 2001-06-19
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Kojima, C;Ulyanov, NB;James, TL
通讯作者: James, TL
DOI: 10.1021/bi7020469
发表时间: 2008-07-22
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Shajani, Zahra;Varani, Gabriele
通讯作者: Varani, Gabriele
DOI: 10.1093/nar/gkp026
发表时间: 2009-04
影响因子: 14.9
作者:
Kypr J;Kejnovská I;Renciuk D;Vorlícková M
通讯作者: Vorlícková M
DOI: 10.1002/j.1460-2075.1986.tb04558.x
发表时间: 1986-10-01
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
HO, PS;ELLISON, MJ;RICH, A
通讯作者: RICH, A
DOI: 10.1016/s0092-8674(01)00446-9
发表时间: 2001-08-10
期刊: CELL
影响因子: 64.5
作者:
Liu, R;Liu, H;Zhao, KJ
通讯作者: Zhao, KJ