G-quadruplex DNA bound by a synthetic ligand is highly dynamic.

G-quadruplex DNA bound by a synthetic ligand is highly dynamic.
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DOI:
10.1021/ja903408r
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发表时间:
2009-09-09
影响因子:
15
通讯作者:
Ha, Taekjip
Ha, Taekjip
中科院分区:
化学1区
文献类型:
--
作者:
Jena, Prakrit V.;Shirude, Pravin S.;Okumus, Burak;Laxmi-Reddy, Katta;Godde, Frederic;Huc, Ivan;Balasubramanian, Shankar;Ha, Taekjip

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Using single molecule fluorescence resonance energy transfer, we investigated the interaction between a quadruplex-binding ligand and the human telomeric G-quadruplex. The binding of quinolinecarboxamide macrocycle to telomeric DNA was essentially irreversible and selectively induced and favored one quadruplex conformation. The ligand−quadruplex complex displayed intramolecular dynamics including quadruplex folding and unfolding in the absence of ligand association and dissociation. We report that the G-quadruplex can be stabilized without preventing the intrinsic intramolecular dynamics of telomeric DNA.
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