Base-pair recognition ability of hydroxyphenyl nucleobases in parallel triplex DNA
作者:Yoshiyuki Hari、Satoshi Kashima、Hiroyasu Inohara、Shin Ijitsu、Takeshi Imanishi、Satoshi Obika
DOI:10.1016/j.tet.2013.05.107
日期:2013.8
Oligonucleotides containing 2'-deoxyribonucleotides bearing hydroxyphenyl nucleobases or their 2',4'-BNA-modified analogs were synthesized, and the triplex-forming ability of their oligonucleotides with double-stranded DNA targets was evaluated by UV melting experiments. Results showed that 2'-deoxyribonucleotide bearing 2'-hydroxyphenyl nucleobase could be recognized by a dUA base pair while no affinity to a TA base pair was observed. The,4'-BNA modification led to a further increase in the binding affinity to a dUA base pair. The,4'-BNA bearing 3-hydroxyphenyl nucleobase showed moderate binding affinity to a TA base pair, but without selectivity. (C) 2013 Elsevier Ltd. All rights reserved.