Analysis of Noncovalent Complexes between Human Telomeric DNA and Polyamides ContainingN-Methylpyrrole andN-Methylimidazole by Using Electrospray Ionization Mass Spectrometry
作者:Jiang Zhou、Gu Yuan
DOI:10.1002/chem.200400803
日期:2005.2.4
Electrospray ionization mass spectrometry (ESI-MS) was used to investigate noncovalent complexes formed between four novel polyamides containing N-methylpyrrole (Py) and N-methylimidazole (Im), and human telomeric DNA. Of the four polyamides investigated, PyPyPygammaImImImbetaDp (3) had the highest binding affinity towards the duplex d(TTAGGGTTAGGG/CCCTAACCCTAA) (D1). Results of competition analysis
电喷雾电离质谱(ESI-MS)用于研究包含N-甲基吡咯(Py)和N-甲基咪唑(Im)的四种新型聚酰胺与人类端粒DNA之间形成的非共价复合物。在研究的四种聚酰胺中,PyPyPygammaImImImbetaDp(3)对双链体d(TTAGGGTTAGGG / CCCTAACCCTAA)(D1)的结合亲和力最高。竞争分析结果表明,聚酰胺与D1的结合亲和力依次为PyPyPygammaImImImbetaDp(3)> PyPyPyPygammaPyImImPybetaDp(4)> PyPyPyPybetaImImImbetaDp(2)>> ImImImbetaDp(2)。MS / MS光谱证实,D1和发夹形聚酰胺之间的结合比三环聚酰胺更稳定。相反,在单链d(TTAGGGTTAGGG)(D2)的情况下,结合顺序变为ImImImbetaDp(1)>