A Carbocyclic Analog of the Oxidatively Generated DNA Lesion Spiroiminodihydantoin
作者:Heiko Müller、Thomas Carell
DOI:10.1002/ejoc.200600982
日期:2007.3
is prone to further oxidation. One-electron oxidants like IrIV oxidize 8-oxo-dG to give secondary lesions such as the spiroiminodihydantoin. This lesion blocks DNA polymerases and induces G T as well as G C transversions. Here, we report the synthesis of a carbocyclic analog of the 8-oxo-dG lesion and the carbocyclic version of the spiroiminodihydantoin lesion. Both lesion analogs were obtained within
8-Oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dG) 是一种易于进一步氧化的诱变 DNA 损伤。像 IrIV 这样的单电子氧化剂氧化 8-oxo-dG 以产生继发性病变,如螺亚胺二乙内酰脲。这种损伤会阻断 DNA 聚合酶并诱导 GT 和 GC 颠换。在这里,我们报告了 8-oxo-dG 病变的碳环类似物和螺亚氨基二乙内酰脲病变的碳环版本的合成。两种损伤类似物都是在单链 DNA 中获得的,并作为它们相应的核苷。病变类似物的表征通过 HPLC、ESI-MS 和 ESI-MS/MS 以及寡核苷酸的酶消化来实现。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)