Methylated Nucleobases: Synthesis and Evaluation for Base Pairing In Vitro and In Vivo
作者:Amit M. Jabgunde、Faten Jaziri、Omprakash Bande、Matheus Froeyen、Mikhail Abramov、Hoai Nguyen、Guy Schepers、Eveline Lescrinier、Vitor B. Pinheiro、Valérie Pezo、Philippe Marlière、Piet Herdewijn
DOI:10.1002/chem.201802304
日期:2018.8.27
The synthesis, base pairing properties and in vitro (polymerase) and in vivo (E. coli) recognition of 2′‐deoxynucleotides with a 2‐amino‐6‐methyl‐8‐oxo‐7,8‐dihydro‐purine (X), a 2‐methyl‐6‐thiopurine (Y) and a 6‐methyl‐4‐pyrimidone (Z) base moiety are described. As demonstrated by Tm measurements, the X and Y bases fail to form a self‐complementary base pair. Despite this failure, enzymatic incorporation
具有2-氨基-6-甲基-8-氧代-7,8-二氢嘌呤(X)的2'-脱氧核苷酸的合成,碱基配对特性以及体外(聚合酶)和体内(大肠杆菌)识别,2-甲基-6-硫代嘌呤(Y)和6-甲基-4-嘧啶酮(Z)碱基部分进行了描述。正如T m测量所证明的,X和Y碱基无法形成自互补碱基对。尽管失败了,酶促掺入实验表明,选定的DNA聚合酶识别X核苷酸,并在模板中掺入了与X相对的修饰核苷酸。在体内,X主要被确认为A / G或C基地;Y被识别为G或C碱基,Z被大多数识别为T或C。很容易替换通常参与W-C识别的核碱基中的官能团(嘌呤的6-羰基和2-氨基;嘧啶的6-羰基)导致正交(缺少与自然碱基的碱基配对)。