Syntheses and Oligonucleotide Incorporation of Nucleoside Analogues Containing Pendant Imidazolyl or Amino Functionalities - The Search for Sequence-Specific Artificial Ribonucleases
作者:Stephen C. Holmes、Michael J. Gait
DOI:10.1002/ejoc.200500413
日期:2005.12
of six nucleoside phosphoramidite analogues containing pendant protected imidazolyl or amino groups and their incorporation into oligonucleotides. We show that the six functionalised phosphoramidites have similar efficiencies of incorporation and present mass spectral evidence that the composition of an oligonucleotide library of 81 components is consistent with the expected mass mixture distribution
含有咪唑基和氨基官能团的寡核苷酸衍生物已被提议作为人工核糖核酸酶,可以模拟 RNase A 的活性,但具有更高的序列特异性。这种寡核苷酸试剂作为增强的反义试剂具有重要的应用,无需募集细胞核酸酶或核酸酶复合物。我们展示了六种核苷亚磷酰胺类似物的合成,其中含有侧链保护的咪唑基或氨基,并将它们掺入寡核苷酸中。我们表明,六种功能化亚磷酰胺具有相似的掺入效率,并提供了质谱证据,表明 81 种组分的寡核苷酸库的组成与预期的质量混合物分布一致。因此,此类亚磷酰胺是构建混合寡核苷酸文库的合适起始材料,该文库包含准备用于筛选序列特异性核糖核酸酶活性的咪唑基和氨基修饰的核苷酸区域。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)