Kinetic analysis of specificity of duplex DNA targeting by homopyrimidine peptide nucleic acids.
Kinetic analysis of specificity of duplex DNA targeting by homopyrimidine peptide nucleic acids.
复制标题
同型嘧啶肽核酸靶向双链 DNA 的特异性的动力学分析。
DOI：
10.1016/s0006-3495(97)78918-5
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Frank-Kamenetskii,MD
中科院分区：
文献类型：
--
作者：
Demidov,VV;Yavnilovich,MV;Frank-Kamenetskii,MD
A simple theoretical analysis shows that specificity of double-stranded DNA (dsDNA) targeting by homopyrimidine peptide nucleic acids (hpyPNAs) is a kinetically controlled phenomenon. Our computations give the optimum conditions for sequence-specific targeting of dsDNA by hpyPNAs. The analysis shows that, in agreement with the available experimental data, kinetic factors play a crucial role in the selective targeting of dsDNA by hpyPNAs. The selectivity may be completely lost if PNA concentration is too high and/or during prolonged incubation of dsDNA with PNA. However, quantitative estimations show that the experimentally observed differences in the kinetic constants for hpyPNA binding with the correct and mismatched DNA sites are sufficient for sequence-specific targeting of long genomic DNA by hpyPNAs with a high yield under appropriate experimental conditions. Differential dissociation of hpyPNA/dsDNA complexes is shown to enhance the selectivity of DNA targeting by PNA.
