Abstract:
:A combination of isothermal titration calorimetry (ITC), topoisomerase I DNA unwinding assays, and ethidium bromide displacement studies were employed to investigate the binding of a homologous series of naphthalene diimides (NDI) to DNA. Our results suggest that the nature of the substituent plays a significant role in both the preferred binding mode and relative binding affinity of the compounds of this study. Only intercalative-type binding (K=15±3×10(6)M(-1)) was observed for the NDI with the smallest substituent (trimethyl-ethylamino), while larger members of the series (diethylmethyl-, dipropylmethyl- and dibutylmethyl-ethylamino substituents) adopted an additional binding mode of higher affinity (K(1)=31-78×10(6)M(-1)).
journal_name
Bioorg Med Chem Lettjournal_title
Bioorganic & medicinal chemistry lettersauthors
McKnight RE,Reisenauer E,Pintado MV,Polasani SR,Dixon DWdoi
10.1016/j.bmcl.2011.05.069subject
Has Abstractpub_date
2011-07-15 00:00:00pages
4288-91issue
14eissn
0960-894Xissn
1464-3405pii
S0960-894X(11)00698-6journal_volume
21pub_type
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