Interaction specificity of benzimidazol group compounds with AT-containing polynucleotides.
1995
Abstract The interaction between polynucleotides: poly(dA)-poly(dT), poly(dA-dT), poly(am2dA- dT), and the AT-specific compounds of benzimidazol group has been studied. It is been shown that these compounds bind to poly(dA)-poly(dT) and poly(dA-dT) at low and high salt concentration in solution. Poly(am2dA-dT) interacts with AT-specific compounds only at low salt, where this polynucleotide is in a B-form, but not at high salt when the polynucleotide converts to another conformation. Thus, the interaction specificity of the groove-binding ligands is influenced not only by the minor groove substituents, but the peculiarities of the secondary structure of polynucleotides.
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