RESEARCH ARTICLE Studies on Transcriptional Incorporation of 5’-N-Triphosphates of 5’-Amino-5’-

In this study, several RNA polymerases were used for the first time to examine the possibility of transcriptional incorporation of 5’-N-triphosphates of 5’-amino-5’-deoxyribonucleosides (5’NHNTPs). The T3, T7, Sp6 and T7 Y639F RNA polymerases were employed to show that the full-length transcript cannot be synthesized. The results suggest that the application of 5’NHNTPs could decrease transcription reaction rates. What is more, the modification of transcription conditions had no influence on the rate of 5’NH NTPs incorporation. Based on experimental data it is postulated that 5’NHNTPs can be used as potential transcription inhibitors. Our findings expand the knowledge on suitable uses of the 5’-N-triphosphates of 5’-amino-5’-deoxyribonucleoside and the exact mechanism of transcriptional inhibition