Involvement of G-triplex and G-hairpin in the multi-pathway folding of human telomeric G-quadruplex.
Involvement of G-triplex and G-hairpin in the multi-pathway folding of human telomeric G-quadruplex.
复制标题
G-三链体和 G-发夹参与人端粒 G-四链体的多途径折叠
DOI:
10.1093/nar/gkx766
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发表时间:
2017-11-02
影响因子:
14.9
通讯作者:
Xi XG
中科院分区:
文献类型:
--
作者:
Hou XM;Fu YB;Wu WQ;Wang L;Teng FY;Xie P;Wang PY;Xi XG
Abstract G-quadruplex (G4) can be formed by G-rich DNA sequences that are widely distributed throughout the human genome. Although G-triplex and G-hairpin have been proposed as G4 folding intermediates, their formation still requires further investigation by experiments. Here, we employed single-molecule FRET to characterize the folding dynamics of G4 from human telomeric sequence. First, we observed four states during G4 folding initially assigned to be anti-parallel G4, G-triplex, G-hairpin and unfolded ssDNA. Then we constructed putative intra-strand G-triplex, G-hairpin structures and confirmed their existences in both NaCl and KCl. Further studies revealed those structures are going through dynamic transitions between different states and show relatively weak dependence on cations, unlike G4. Based on those results and molecular dynamics simulations, we proposed a multi-pathway folding mechanism for human telomeric G4. The present work may shed new light on our current understanding about the existence and stability of G4 intermediate states.
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影响因子:
14.9
作者:
Cerofolini L;Amato J;Giachetti A;Limongelli V;Novellino E;Parrinello M;Fragai M;Randazzo A;Luchinat C
通讯作者:
Luchinat C
DOI:
10.1038/nrg3296
发表时间:
2012-11
期刊:
Nature reviews. Genetics
影响因子:
--
作者:
通讯作者:
--
影响因子:
46.9
作者:
Chambers, Vicki S.;Marsico, Giovanni;Balasubramanian, Shankar
通讯作者:
Balasubramanian, Shankar
影响因子:
14.9
作者:
Lane AN;Chaires JB;Gray RD;Trent JO
通讯作者:
Trent JO
影响因子:
14.9
作者:
Kypr J;Kejnovská I;Renciuk D;Vorlícková M
通讯作者:
Vorlícková M