Base-pair resolution analysis of the effect of supercoiling on DNA flexibility and major groove recognition by triplex-forming oligonucleotides.
Base-pair resolution analysis of the effect of supercoiling on DNA flexibility and major groove recognition by triplex-forming oligonucleotides.
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碱基对分辨分析超螺旋对DNA柔韧性的影响和三链形成的寡核苷酸对主要沟槽的识别。
DOI:
10.1038/s41467-021-21243-y
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发表时间:
2021-02-16
影响因子:
16.6
通讯作者:
Harris SA
中科院分区:
文献类型:
--
作者:
Pyne ALB;Noy A;Main KHS;Velasco-Berrelleza V;Piperakis MM;Mitchenall LA;Cugliandolo FM;Beton JG;Stevenson CEM;Hoogenboom BW;Bates AD;Maxwell A;Harris SA
In the cell, DNA is arranged into highly-organised and topologically-constrained (supercoiled) structures. It remains unclear how this supercoiling affects the detailed double-helical structure of DNA, largely because of limitations in spatial resolution of the available biophysical tools. Here, we overcome these limitations, by a combination of atomic force microscopy (AFM) and atomistic molecular dynamics (MD) simulations, to resolve structures of negatively-supercoiled DNA minicircles at base-pair resolution. We observe that negative superhelical stress induces local variation in the canonical B-form DNA structure by introducing kinks and defects that affect global minicircle structure and flexibility. We probe how these local and global conformational changes affect DNA interactions through the binding of triplex-forming oligonucleotides to DNA minicircles. We show that the energetics of triplex formation is governed by a delicate balance between electrostatics and bonding interactions. Our results provide mechanistic insight into how DNA supercoiling can affect molecular recognition, that may have broader implications for DNA interactions with other molecular species. In cells, DNA is arranged into topologically-constrained (supercoiled) structures, but how this supercoiling affects the detailed double-helical structure of DNA remains unclear. Here authors use atomic force microscopy and atomistic molecular dynamics simulations, to resolve structures of negatively-supercoiled DNA minicircles at base-pair resolution.
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影响因子:
3.7
作者:
Higgins NP;Vologodskii AV
通讯作者:
Vologodskii AV
影响因子:
5.5
作者:
Hess, Berk;Kutzner, Carsten;Lindahl, Erik
通讯作者:
Lindahl, Erik
DOI:
10.1016/j.ymeth.2021.01.008
发表时间:
2021-09
期刊:
Methods (San Diego, Calif.)
影响因子:
--
作者:
Beton JG;Moorehead R;Helfmann L;Gray R;Hoogenboom BW;Joseph AP;Topf M;Pyne ALB
通讯作者:
Pyne ALB
影响因子:
14.9
作者:
Demurtas D;Amzallag A;Rawdon EJ;Maddocks JH;Dubochet J;Stasiak A
通讯作者:
Stasiak A
影响因子:
14.9
作者:
Curuksu, Jeremy;Zacharias, Martin;Zakrzewska, Krystyna
通讯作者:
Zakrzewska, Krystyna