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2′-N-Guanidino,4′-C-ethylene bridged thymidine (GENA-T) modified oligonucleotide exhibits triplex formation with excellent enzymatic stability

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)12257-12260
JournalRSC Advances
Publication statusPublished - 14 Jan 2015
Externally publishedYes
Publication typeA1 Journal article-refereed


Here we present the synthesis and characterization of a new 2′-N-Guanidino,4′-C-ethylene bridged thymidine (GENA-T) modified oligonucleotide possessing North-locked sugar conformation. Incorporation of GENA-T nucleotide though did not change the thermal stability of the oligonucleotides toward the complementary RNA; it significantly increased the stability of the parallel triplex at pH 7. The melting temperature of the triplex was increased by +9.5 °C as compared to that of the isosequential unmodified sequence. Moreover this modification imparted exceptional nuclease stability to the oligonucleotides for over 33 h. This study clearly demonstrates that GENA-T modified oligonucleotides could improve triplex formation with phenomenal enzymatic stability and could be used for various biomedical applications.