cis-Cyclopentyl PNA (cpPNA) as constrained chiral PNA analogues: stereochemical dependence of DNA/RNA hybridizationElectronic Supplementary Information (ESI) available: Experimental procedures for the synthesis of compounds, 1H, 13C NMR, mass spectral data, crystal structural data and melting curves for triplexes. See http://www.rsc.org/suppdata/cc/b3/b317000d/
cis-Cyclopentyl PNA (cpPNA) as constrained chiral PNA analogues: stereochemical dependence of DNA/RNA hybridizationElectronic Supplementary Information (ESI) available: Experimental procedures for the synthesis of compounds, 1H, 13C NMR, mass spectral data, crystal structural data and melting curves for triplexes. See http://www.rsc.org/suppdata/cc/b3/b317000d/
(1<i>S</i>,2<i>R</i>/1<i>R</i>,2<i>S</i>)-<i>cis</i>-Cyclopentyl PNAs (<i>cp</i>PNAs) as Constrained PNA Analogues: Synthesis and Evaluation of <i>a</i><i>eg-cp</i>PNA Chimera and Stereopreferences in Hybridization with DNA/RNA
作者:T. Govindaraju、Vaijayanti A. Kumar、Krishna N. Ganesh
DOI:10.1021/jo049442+
日期:2004.8.1
oligomers at defined positions and through the entire sequence. Hybridization studies with complementary DNA and RNA sequences using UV−Tm measurements indicate that aeg-cpPNA chimera form thermally more stable complexes than aegPNA with stereochemistry-dependent selective binding of cDNA/RNA. Differential gel shift retardation was observed on hybridization of aeg-cpPNAs with complementary DNA.
构象受限的手性PNA类似物是基于在aeg PNA的氨基乙基片段上的1,2 - c is-环戊基部分的立体有择的设计而设计的。已知环戊烷环是相对柔性的系统,其中特性起皱决定了取代基的假轴/假赤道位置。因此,当将该部分施加于常规PNA骨架上时,有利的扭转调节有可能获得必要的杂交能力构象。对映体纯的1,2-顺式-环戊基PNA单体(10a和10b)的合成是通过关键中间体酯2的立体选择性酶水解实现的。将手性(1 S,2 R / 1 R,2 S)-氨基环戊基甘氨酰胸腺嘧啶单体在确定的位置并通过整个序列掺入PNA低聚物中。使用UV- T m测量值对互补的DNA和RNA序列进行的杂交研究表明,aeg - cp PNA嵌合体形成的热稳定性比aeg PNA具有更稳定的复合体,且具有立体化学依赖性的cDNA / RNA选择性结合。在aeg - cp PNA与互补DNA杂交时观察到差异的凝胶移位阻滞。
cis-Cyclopentyl PNA (cpPNA) as constrained chiral PNA analogues: stereochemical dependence of DNA/RNA hybridizationElectronic Supplementary Information (ESI) available: Experimental procedures for the synthesis of compounds, 1H, 13C NMR, mass spectral data, crystal structural data and melting curves for triplexes. See http://www.rsc.org/suppdata/cc/b3/b317000d/
作者:T. Govindaraju、Vaijayanti A. Kumar、Krishna N. Ganesh
DOI:10.1039/b317000d
日期:——
DNA/RNA hybridization studies of PNA-T oligomers with cis-(1S,2R/1R,2S)-cyclopentyl units in the backbone show stereochemistry dependent binding with RNA/DNA discrimination.