5-iodo-dCTP with the corresponding (fluoro)cytosine-alkynes. The modified dCXCTPs were good substrates for DNA polymerases and were used for enzymatic synthesis of cytosine-functionalized DNA by primer extension or PCR. The cytosine- or fluorocytosine-linked DNA probes did not significantly inhibit DNA methyltransferases and did not cross-link to these proteins.
新型的双头2'-脱氧
胞苷5'- O-
三磷酸酯(dC XC TP s)带有另一个通过柔性炔丙基,高炔丙基或戊-1-炔基连接至位置5的
胞嘧啶或5-
氟胞嘧啶,其制备方法如下: 5-
碘-dCTP与相应的(
氟)
胞嘧啶炔烃的Sonogashira
水溶液的交叉偶联反应。修饰的dC XC TP s是
DNA聚合酶的良好底物,可用于通过引物延伸或PCR酶法合成
胞嘧啶官能化的DNA。
胞嘧啶或
氟胞嘧啶连接的DNA探针没有明显抑制DNA甲基转移酶,也没有与这些蛋白质交联。