Peptide-nucleic acids (PNAs) with pyrimido[4,5-d]pyrimidine-2,4,5,7-(1H,3H,6H,8H)-tetraone (PPT) as a universal base: their synthesis and binding affinity for oligodeoxyribonucleotides
作者:Taisuke Hirano、Kenji Kuroda、Masanori Kataoka、Yoshihiro Hayakawa
DOI:10.1039/b821193k
日期:——
affinity for the complementary oligodeoxyribonucleotides was investigated. We found that PNAs with one or two PPT(s) and natural nucleobases (i.e., adenine, cytosine, guanine, or thymine) have excellent binding affinity for oligodeoxyribonucleotides with complementary bases at the positions facing the natural nucleobases, and with adenine, cytosine, guanine, and thymine at the positions opposite PPT
合成了以嘧啶并[4,5 - d ]嘧啶-2,4,5,7-(1 H,3 H,6 H,8 H)-四酮(PPT)为核碱基的肽核酸(PNAs),并研究了它们对互补寡聚脱氧核糖核苷酸的结合亲和力。我们发现具有一个或两个PPT和天然核碱基的PNA(即,腺嘌呤, 胞嘧啶, 鸟嘌呤, 或者 胸腺嘧啶)对寡聚脱氧核糖核苷酸具有优异的结合亲和力,该寡聚核苷酸在面对天然核碱基的位置具有互补碱基,并且具有 腺嘌呤, 胞嘧啶, 鸟嘌呤, 和 胸腺嘧啶在PNA中与PPT相对的位置。含PPT的PNA的结合亲和力高于或等于由所有互补天然核碱基组成的PNA的结合亲和力。在含有PPT的PNA中,用合适的天然核碱基代替PPT的PNA。因此,可以得出结论,PPT是可以识别所有天然核碱基的有用的通用碱基。