An Efficient Method for the Construction of Functionalized DNA Bearing Amino Acid Groups through Cross-Coupling Reactions of Nucleoside Triphosphates Followed by Primer Extension or PCR
作者:Petr Čapek、Hana Cahová、Radek Pohl、Michal Hocek、Christian Gloeckner、Andreas Marx
DOI:10.1002/chem.200700220
日期:2007.7.16
for DNA polymerases for construction of functionalized DNA through primer extension and PCR. While 8-substituted adenosine triphosphates were poor substrates for DNA polymerases, the corresponding 7-substituted 7-deazaadenine and 5-substituted uracil nucleotides were efficiently incorporated in place of dATP or dTTP, respectively, by Pwo (Pyrococcus woesei) DNA polymerase. Nucleotides bearing the amino
核碱基卤代的2'-脱氧核苷(8-溴-2'-脱氧腺苷,7-碘-7-脱氮-2'-脱氧腺苷或5-碘-2'-脱氧尿苷的单步水交叉偶联反应)或它们的4'-硼烷苯基丙氨酸或4-乙炔基苯基丙氨酸的5'-三磷酸酯已被开发出来,并用于有效合成带有氨基酸基团的修饰的2'-脱氧核苷三磷酸酯(dNTP)。然后将这些dNTPs作为DNA聚合酶的底物进行测试,以通过引物延伸和PCR构建功能化的DNA。虽然8取代的腺苷三磷酸是DNA聚合酶的较差底物,但Pwo(Pyrococcus woesei)DNA聚合酶分别有效地将相应的7取代的7-deazaadenine和5取代的尿嘧啶核苷酸取代了dATP或dTTP。与通过较大体积的亚苯基直接连接的核苷酸相比,具有通过较小体积的乙炔连接子连接的氨基酸的核苷酸的掺入效率更高。另外,通过Pwo聚合酶掺入了修饰的dATP和dTTP的组合。通过这种两步法制备了带有氨基酸部分的新型功能化D