Synthesis and hybridization properties of β- and α-oligodeoxynucleotides containing β- and α-1-(3-C-allyl-2-deoxy-D-erythro-pentofuranosyl)thymine and α-1-[3-C-(3-aminopropyl)-2-deoxy-D-erythro-pentofuranosyl]thymine
作者:Pia N. Jørgensen、Ulrik S. Sørensen、Henrik M. Pfundheller、Carl E. Olsen、Jesper Wengel
DOI:10.1039/a703173d
日期:——
Convergent synthesis of β- and α-1-(3-C-allyl-2-deoxy-D-erythro-pentofuranosyl)thymine and their incorporation into β- and α-oligodeoxynucleotides (ODNs) is described. The thermal stabilities of duplexes formed between modified ODNs and complementary single-stranded DNA and RNA have been evaluated. In all cases stable duplexes are formed, but whereas β-ODNs containing β-3â²-C-allylthymidine show moderately lowered thermal stability towards both DNA and RNA, α-ODNs containing α-3â²-C-allylthymidine show significantly increased thermal stabilities compared with the corresponding β-ODN reference duplexes. Even more stable duplexes towards both DNA and RNA have been obtained using an α-ODN containing one α-1-[3-C-(3-aminopropyl)-2-deoxy-D-erythro-pentofuranosyl]thymine monomer.
本研究描述了δ-和δ-1-(3-C-烯丙基-2-脱氧-D-赤式戊呋喃糖基)胸腺嘧啶的聚合合成及其与δ-和δ-寡脱氧核苷酸(ODNs)的结合。对修饰的 ODN 与互补的单链 DNA 和 RNA 之间形成的双链体的热稳定性进行了评估。在所有情况下都能形成稳定的双链,但与相应的δ-ODN 参考双链相比,含有δ-3â²-C-烯丙基胸苷的δ-ODN 对 DNA 和 RNA 的热稳定性略有降低,而含有δ-3â²-C-烯丙基胸苷的δ-ODN 的热稳定性则显著提高。使用含有一个δ-1-[3-C-(3-氨基丙基)-2-脱氧-D-赤式戊呋喃糖基]胸腺嘧啶单体的δ-ODN,还能获得对 DNA 和 RNA 都更稳定的双链体。