Independent Generation and Characterization of a C2‘-Oxidized Abasic Site in Chemically Synthesized Oligonucleotides
作者:Jaeseung Kim、Yvonne N. Weledji、Marc M. Greenberg
DOI:10.1021/jo049033d
日期:2004.9.1
Abasic lesions, which are formed endogenously and as a consequence of exogenous agents, are lethal and mutagenic. Hydrogen atom abstraction from C2‘ in DNA under aerobic conditions produces an oxidized abasic lesion (C2-AP), along with other forms of DNA damage. The effects of C2-AP on DNA structure and function are not well understood. A method for the solid-phase synthesis of oligonucleotides containing
内源性由于外源性因素而形成的无基础性病变具有致死性和致突变性。在有氧条件下从DNA中的C2'提取氢原子会产生氧化的无碱基损伤(C2-AP),以及其他形式的DNA损伤。C2-AP对DNA结构和功能的影响尚不清楚。报道了一种固相合成包含C2-AP损伤的寡核苷酸的方法。病变通过含邻位二醇的三醇的高碘酸盐氧化释放。通过与标准寡核苷酸合成和脱保护条件相容的亚磷酰胺引入三醇。紫外熔解研究表明,C2-AP病变对双链DNA热稳定性的影响与其他无碱基病变相似。在90°C下,哌啶可快速裂解C2-AP病变。t 1/2 = 3.3±0.2 h)。