A new photoisomeric nucleoside dUAz bearing an azobenzene group at the C5-position of 2'-deoxyuridine was designed and synthesized. Photoisomerization of dUAz in oligodeoxynucleotides can be achieved rapidly and selectively with 365 nm (forward) and 450 nm (backward) irradiation. Thermal denaturation experiments revealed that dUAz stabilized the duplex in the cis-form and destabilized it in the trans-form with mismatch discrimination ability comparable to thymidine. These results indicate that dUAz could be a powerful material for reversibly manipulating nucleic acid hybridization with spatiotemporal control.
我们设计并合成了一种新的光异构核苷 dUAz,它在 2'- 脱氧
尿苷的 C5 位上带有
偶氮苯基。在 365 纳米(正向)和 450 纳米(反向)的照射下,寡脱氧核苷酸中的 dUAz 可快速、选择性地实现光异构化。热变性实验表明,dUAz 能稳定顺式双链,而破坏反式双链的稳定性,其错配识别能力与
胸苷相当。这些结果表明,dUAz 可以成为一种强大的材料,用于可逆地操纵核酸杂交的时空控制。