Diverse size approach to incorporate and extend highly fluorescent unnatural nucleotides into DNA
作者:Binh Huy Le、Ja Choon Koo、Han Na Joo、Young Jun Seo
DOI:10.1016/j.bmc.2017.03.045
日期:2017.7
unnatural nucleotides containing fluorescent (dApyrTP, dUpyrTP, dUantTP, dUthiTP) and quencher (dUazoTP) units, as well as nucleotides presenting small functional groups (dAethTP, dAoctTP, dUethTP, dUiodTP), all based on deoxyadenosine and deoxyuridine, and examined their suitability for use in enzymatic incorporation and extension into DNA. We observed a size-dependence of the incorporation and extension
我们准备了一系列大小不一的非天然核苷酸,它们均基于荧光(dApyrTP,dUpyrTP,dUantTP,dUthiTP)和淬灭(dUazoTP)单元,以及具有小的官能团(dAethTP,dAoctTP,dUethTP,dUiodTP)的核苷酸。脱氧腺苷和脱氧尿苷,并检查了它们在酶促掺入和扩展到DNA中的适用性。我们观察到引物延伸过程中掺入和延伸能力的大小依赖性(遵循dUiodTP = dUethTP = dUthiTP> dUazoTP> dUpyrTP> dUantTP的顺序)。该结果得到圆二色性(CD)光谱的支持,圆二色性光谱揭示了不同B型DNA结构的趋势,该结构取决于脱氧尿苷5位单元的大小(dUiodTP> dUethTP> dUthiTP> dUpyrTP)。从PCR产物。有趣的是,dUthiTP可以在引物延伸甚至PCR扩增过程中掺入并延伸到长DNA链中,CD光谱证实了稳定的二级B