An Unnatural Hydrophobic Base Pair with Shape Complementarity between Pyrrole-2-carbaldehyde and 9-Methylimidazo[(4,5)-b]pyridine
作者:Tsuneo Mitsui、Aya Kitamura、Michiko Kimoto、Taiko To、Akira Sato、Ichiro Hirao、Shigeyuki Yokoyama
DOI:10.1021/ja028806h
日期:2003.5.1
with DNA polymerases was superior, in comparison to that of F. The aldehyde group of Pa was recognized well by the Klenow fragment of Escherichia coli DNA polymerase I and the reverse transcriptase of Avian myeloblastosis virus. The structural features of the Q-Pa pair in a DNA duplex were analyzed by NMR, showing the shape complementarity of the Pa fitting with Q. The structurally unique base Pa provides
一种非天然疏水性碱吡咯-2-甲醛(表示为 Pa)被开发为 9-甲基咪唑并 [(4,5)-b] 吡啶 (Q) 的特定配对伙伴。已知 Q 碱基与 2,4-二氟甲苯 (F) 作为 AT 对的等排体配对,并且 F 在复制中也与 A 有效配对。相比之下,Q-Pa 对在复制中表现出特异性选择性,五元环碱基 Pa 与 Q 有效配对,但与 A 配对较差。 此外,与 DNA 聚合酶相比,Pa 与 DNA 聚合酶的相互作用更好F.Pa的醛基被大肠杆菌DNA聚合酶I的Klenow片段和禽成髓细胞瘤病毒的逆转录酶很好地识别。通过核磁共振分析了DNA双链体中Q-Pa对的结构特征,显示了Pa与Q拟合的形状互补性。