Redox-dependent control of i-Motif DNA structure using copper cations.
Redox-dependent control of i-Motif DNA structure using copper cations.
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DOI:
10.1093/nar/gky390
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发表时间:
2018-07-06
影响因子:
14.9
通讯作者:
Waller ZA
中科院分区:
文献类型:
--
作者:
Abdelhamid MA;Fábián L;MacDonald CJ;Cheesman MR;Gates AJ;Waller ZA
Previous computational studies have shown that Cu+ can act as a substitute for H+ to support formation of cytosine (C) dimers with similar conformation to the hemi-protonated base pair found in i-motif DNA. Through a range of biophysical methods, we provide experimental evidence to support the hypothesis that Cu+ can mediate C–C base pairing in i-motif DNA and preserve i-motif structure. These effects can be reversed using a metal chelator, or exposure to ambient oxygen in the air that drives oxidation of Cu+ to Cu2+, a comparatively weak ligand. Herein, we present a dynamic and redox-sensitive system for conformational control of an i-motif forming DNA sequence in response to copper cations.
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