Synthesis and Characterization of Oligodeoxynucleotides Containing Formamidopyrimidine Lesions and Nonhydrolyzable Analogues
作者:Kazuhiro Haraguchi、Michael O. Delaney、Carissa J. Wiederholt、Aruna Sambandam、Zsolt Hantosi、Marc M. Greenberg
DOI:10.1021/ja012135q
日期:2002.4.1
the nucleotide proper base-pairing partner. However, duplexes containing Fapy.dG-dA mispairs melt significantly higher than those comprised of dG-dA. All duplexes containing Fapy.dA-dX or its C-nucleoside analogue melt lower than the respective complexes containing dA-dX. Studies of the alkaline lability of oligodeoxynucleotides containing formamidopyrimidine lesions indicate that Fapy.dA is readily
通过固相合成和在某些情况下酶促连接制备在特定位点含有甲酰氨基嘧啶损伤和 C-核苷类似物的寡聚脱氧核苷酸。甲酰胺嘧啶损伤作为二核苷酸引入,以防止重排为其吡喃糖异构体。通过使用各自的亚磷酰胺引入包含 Fapy.dA 的 C-核苷类似物的单一非对映异构体的寡脱氧核苷酸。当与核苷酸正确的碱基配对伙伴相对时,甲酰胺嘧啶病变会降低十二聚体相对于其未修饰核苷酸对应物的 T(M)。然而,含有 Fapy.dG-dA 错误配对的双链体比由 dG-dA 组成的双链体熔解度显着更高。含有 Fapy.dA-dX 或其 C-核苷类似物的所有双链体的熔解低于含有 dA-dX 的相应复合物。