A sequence-specific threading tetra-intercalator with an extremely slow dissociation rate constant.
A sequence-specific threading tetra-intercalator with an extremely slow dissociation rate constant.
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DOI:
10.1038/nchem.1151
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发表时间:
2011-09-25
期刊:
影响因子:
21.8
通讯作者:
中科院分区:
文献类型:
--
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A long-lived and sequence specific ligand-DNA complex would make possible the modulation of biological processes for extended periods. We have been investigating the threading polyintercalation approach to DNA recognition in which chains of aromatic units thread back and forth repeatedly through the double helix. Here we report the preliminary sequence specificity and detailed kinetic analysis of a structurally characterized threading tetraintercalator. Specific binding on a relatively long DNA strand was observed, strongly favoring a predicted 14-base pair sequence. Kinetic studies revealed a multi-step association process and specificity was found to derive primarily from large differences in dissociation rates. Importantly, the rate-limiting dissociation rate constant of the tetraintercalator complex dissociating from its preferred binding site was extremely slow, corresponding to a 16 day half-life, making it one of the longer non-covalent complex half-lives yet measured, and, to the best of our knowledge, the longest for a DNA binding molecule.
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影响因子:
15
作者:
Guelev, V;Sorey, S;Iverson, BL
通讯作者:
Iverson, BL
影响因子:
5.6
作者:
MULLER, W;CROTHERS, DM
通讯作者:
CROTHERS, DM
DOI:
10.1073/pnas.0909192106
发表时间:
2009-09-29
影响因子:
11.1
作者:
Muzikar, Katy A.;Nickols, Nicholas G.;Dervan, Peter B.
通讯作者:
Dervan, Peter B.
影响因子:
2.4
作者:
Graff, CP;Chester, K;Wittrup, KD
通讯作者:
Wittrup, KD
影响因子:
14.9
作者:
IVERSON, BL;DERVAN, PB
通讯作者:
DERVAN, PB